Industrial Metering Unit-II/S (IMU-II/S) AC-Powered Unit Assembly with Serial Port and Control Output Option Mercury Instruments Stock #

Transcription

1 Honeywell Process Solutions Industrial Metering Unit-II/S (IMU-II/S) AC-Powered Unit Assembly with Serial Port and Control Output Option Mercury Instruments Stock # User Manual November 2010 Revision D Honeywell

2 Document: Revision: C July, 2008 ii

3 COMMON QUESTIONS What does this device do? The IMU-II/s can count electrical pulses from two independent, external sources. A pulse could represent any measurable quantity such as a volume of gas, a kilowatt of electricity or an item dispensed from a vending machine. The IMU-II/s counts these pulses over a predetermined period of time and then saves the total count in its memory as one record. It then starts over for the next time period and continues this process for hours, days or weeks at a time. At regular intervals the IMU-II/s establishes a wired phone call to a central computer system and transmits this information for processing. Mercury Instruments provides a powerful application program called DC-2000 which can process calls from thousands of devices, store their data in a database and present the results to users in a variety of formats. The IMU-II/s can also monitor several external and internal signals that might indicate alarm conditions, such as device tampering, excessive pressure, loss of power, etc. The IMU-II/s can be programmed to place an immediate call when any of these conditions occur. In addition to monitoring alarm conditions and counting pulses any external device with a standard RS-232 serial port can be connected to the IMU-II/s. In a special mode the IMU-II/s can act as a transparent link between the device and the central computer system. Finally, the IMU-II/s can produce up to four digital control signals that can be altered remotely from the central computer. These signals can be used to activate lights, motors or audible alarm devices. What equipment can be used with the IMU-II/s? The pulse and alarm inputs can be connected to normally open switch contacts, such as relays, reed switches or open-collector semiconductor devices such as transistors. The IMU-II/s cannot accept signals that can source current, such as an output from an amplifier. Nearly any device that has a serial RS-232 port can be connected to the IMU-II/s serial port. A minimum of three wires is needed to carry data between the two units. Baud rates from 300 to 9600 are supported. Using an optional adapter board called a dual-port multiplexer two separate RS-232 devices can be connected to the same IMU-II/s. The devices do not have to be similar to each other and can operate at different baud rates. The four digital control outputs switch between 0V and +5V. These outputs do not produce enough current to directly drive heavy loads such as relays or lights and will probably have to be buffered or amplified. They cannot be pulled to voltages higher than +5V. How is the IMU-II/s packaged? The IMU-II/s circuit board, a power supply board and optional backup batteries are mounted in a robust NEMA4X weatherproof enclosure that can be mounted to a wall or pole. iii

4 Is the IMU-II/s ready to use immediately? No, there are three important steps before the IMU-II/s can be put into service: 1) Any external equipment, including a phone line, must be wired to the IMU-II/s (Chapter- 2). 2) You must configure the IMU-II/s using a computer and a special program and cable from Mercury Instruments (Chapter-3). 3) The data collection software supplied by Mercury Instruments (DC-2000) must be supplied with information about the IMU-II/s (Chapter-4). Why must the IMU-II/s be configured? When the IMU-II/s places a phone call it must have a phone number to dial, instructions about what to do if the line is busy, what baud rate to use, etc. Each IMU-II/s must also be assigned a unique ID number. The IMU-II/s is configured using your computer and a special cable and software supplied by Mercury Instruments. This can be done any time before, during or after installation. Chapter-3 has more information. What does the DC-2000 data collection software do? Mercury Instruments data collection software, DC-2000, has the ability to process calls from, or place calls to thousands of units. Each IMU-II/s can be scheduled to call in at specific times throughout the day, or once a week or once a month. The data collection software can process the IMU-II/s information in many different ways, depending upon the customer s needs. It can also notify the customer immediately when an alarm condition occurs. To do this properly, each unit must be registered with the software. When using DC-2000 a special Mercury Instruments modem is required at the central computer. This modem can support up to eight incoming phone lines and supports a special secure protocol known only to Mercury Instruments devices. iv

5 TABLE OF CONTENTS 1 PRODUCT DESCRIPTION Product Overview Communications Unit Configuration INSTALLATION and TECHNICAL INFORMATION Unpacking, Damage reports, Item List Additional Items Required for Installation Unit Assembly Dimensions IMU-II/s Board Layout IMU-II/s Block Diagram Power Supply Board AC Power Cable Wiring Connection AC Voltage Selection Lithium Backup Battery Installation Electrical Block Diagram Wiring External Devices to the IMU-II/s Installing the Optional Dual-Port Multiplexer Using the IMU-II/s Control Outputs Quick Power-Up Check CONFIGURATION USING MP Mercury Instruments Programmer Cable MP32 Software Startup Main Configuration Screen Remote Unit ID Destination Originate Calls Respond to Voice Calls Respond to SMS Maintain Internet Connection Dialer Type Dual Port Firmware Version Answer RING Count Time Interval Size Primary Call Retry Rate Primary Call Retry Count Secondary Call Retry Interval Counter/Status Input Counter/Status Input Serial Port-1 Screen Port Select ID Max BPS Data Bits Parity Type Stop Bits Serial Port-2 Screen Cellular Settings Screen Programming the IMU-II/s v

6 4 DC-2000 DATA COLLECTION SYSTEM Introduction Starting the IMU-II/s Configuration Process Setting up a Call Schedule Defining the IMU-II/s Altering the Control Outputs of the IMU-II/s Starting the Data Collection Process IMU-II/s OPERATION Call Retry Strategy What Causes the IMU-II/s to Call In? Alarm Condition Scheduled Call Behavior when Originating a Call Behavior when Answering a Call Transparent mode for alarm status and maintenance Transparent mode for one external serial device Transparent mode for two external serial devices SAFETY, HAZARDOUS AREAS, ESD PRECAUTIONS TECHNICAL SPECIFICATIONS ASCII-HEX-DECIMAL CONVERSION CHART LIST OF TABLES IMU-II/s Circuit Board Jumper Configuration Transparent Mode Status Commands vi

7 LIST OF FIGURES Mercury Instruments Programmer Cables Outside Enclosure Dimensions Enclosure and Wire Gland Dimensions Enclosure Mounting Tab (1 of 4) Primary Components of the IMU-II/s Board Block Diagram of the IMU-II/s AC Power Supply Board Block Diagram of the Power Supply Board Metal Safety Shield Routing and Connection of AC Mains Power Electrical Block Diagram Connection of External Devices to the IMU-II/s Dual Port Multiplexer Board Wiring Two Serial Devices to the Multiplexer Board Control Output Adapter Board Typical Control Output Application - RNM MP32 Login Screen MP32 Start-Up Screen Communication Port Configuration Screen Main Configuration Screen Screen Image with Serial Port 1 Tab Selected Starting the System Configuration Changing the Data Collection Configuration Configuring DC-2000 for Phone Line Connections Configuring a Call Schedule Defining a Call Profile Name Defining the Call Profile Parameters Starting the IMU-II/s Configuration Process Selecting a Default Account Configuration Setup Screen Data Input Configuration Screen Call Profile Screen Hardware Alarm Configuration Screen Relay Information Screen IMU-II/s s LED Indicators vii

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9 1.1 Product Overview 1 PRODUCT DESCRIPTION Many metering devices generate electrical pulses to indicate a unit of measure. For example a gasoline pump might contain a rotating device whose speed of rotation is directly related to the amount of fluid flowing past it. With each rotation an electrical pulse is generated to indicate that a certain amount of gas has been dispensed. At a movie theater the machine that dispenses tickets might generate one pulse per ticket, or perhaps a pulse per ticket for each movie playing. For these pulses to be meaningful there must be a way to count them and save the results for later use. In the movie theater example this information can be gathered at the end of the day from all of the theaters in the country to see how well any particular movie is doing. Mercury Instruments IMU-II/s is designed to count pulses over a specific period time and save the total as one record. It then repeats the process for the next time period and can do this for hours, days or months at a time. It can process pulses from two independent sources. It can also monitor several other electrical signals that might indicate alarm conditions, such as a low-pressure situation on a gas pipeline. In these situations the IMU-II/s can contact the central computer system immediately. At some point the IMU-II/s must transmit its records to a central computer system for processing and to make room for more storage. The IMU-II/s uses a low-speed wire line modem to communicate with the central computer system. The IMU-II/s can produce up to four digital output signals that can be controlled from the central computer system. These signals can be used to activate lights, motors, alarms or many other devices. Mercury Instruments offers a powerful application program called DC-2000 that can collect information from thousands of devices, store their data in a database and present the results to the user in a variety of formats. It can also notify the customer immediately when an alarm condition occurs. When using DC-2000 a special Mercury Instruments modem is required at the central computer. This modem can support up to eight incoming phone lines and supports a special secure protocol known only to Mercury Instruments devices. In addition to counting pulses and monitoring alarm signals nearly any device that has a serial RS-232 port can be connected to the IMU-II/s. A minimum of three wires is needed to carry data between the two units. Baud rates from 300 to 9600 are supported. In a special mode the IMU-II/s allows the central computer system to communicate directly with the serial device as though they were directly wired together. In this mode it is not necessary to use the DC-2000 program or the special Mercury Instruments modem equipment. A simple low-speed modem is all that is required. 1-1

10 1.2 Communications Figures 1-1 illustrates a typical connection from end to end. Figure 1-1 Typical Data Collection System Scenario #1: The IMU-II/s initiates a call to the central computer running Mercury Instruments DC-2000 data collection software: The IMU-II/s determines that a call should be made due to an alarm condition or a regularly scheduled call event. The IMU-II/s initiates an outbound phone call to the central computer. The central computer answers the call and processes the IMU-II/s data and stores it in a database structure format. The IMU-II/s is updated with new information such as the next call time and the call is then terminated

11 Scenario #2: The data collection computer running Mercury Instruments DC-2000 data collection software initiates a call to the IMU-II/s: The IMU-II/s is always listening for an incoming call. The central computer dials the IMU-II/s phone number. When the IMU-II/s answers the call it will establish a link with the computer. The computer processes the meter s data and stores it in a database structure format. The IMU-II/s is updated with new information such as the next call time and the call is then terminated. Scenario #3: The computer initiates a call to the IMU-II/s or the IMU-II/s calls the computer. In either case the computer is not running the DC-2000 program and is connected to a simple (non-mercury Instruments) modem. A serial device is connected to the IMU-II/s serial port. The computer or IMU-II/s answers the call. The IMU-II/s will first attempt to communicate with a Mercury Instruments modem. After several seconds without an appropriate response, the IMU-II/s will enter a transparent mode. Any information received from the modem will be passed on to the serial device, and visa-versa. The call will terminate if 60 seconds has gone by without data being sent by either device, or if the computer terminates the connection. 1.3 Unit Configuration Two circuit boards and several cables are mounted in a weatherproof NEMA4X enclosure suitable for mounting to a wall or pole. The IMU-II/s circuit board takes care of all pulse counting, alarm monitoring, serial communications and phone line communications. The other board accepts either 115 or 230 VAC power and produces low-voltage dc power for the IMU-II/s board. This board also accepts several optional lithium batteries that will power the unit when AC power is lost. It generates an alarm signal to the IMU- II/s when AC power is lost. The IMU-II/s can be configured to place calls when AC power is lost and restored. This is a special configuration that can produce up to four digital control signals that can be controlled by the central computer. These signals can be used to control motors, lights or alarms. One particular application allows another Mercury Instruments device called the Remote Notification Module, or RNM, to be controlled in this fashion. There is more information about this in Chapters-2 and

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13 2 INSTALLATION and TECHNICAL INFORMATION 2.1 Unpacking, Damage reports, Item List Inspect the IMU-II/s for any potential shipping damage. If any damage is detected that can be attributed to the way the package was handled, then a claim should be filed with the shipping agent as quickly as possible. A typical IMU-II/s is provided with the following items: The IMU-II/s circuit board with firmware AC Power supply board Backup batteries (optional) Outdoor enclosure Control output adapter board installed on the IMU-II/s board. Manual (this document). Normally only one manual is included with each shipment rather than with each unit. Additional manuals can be ordered separately or obtained in PDF file format upon request. Note: The items listed above may vary depending on what was requested with the original purchase order. Refer to the shipping document or the purchase order for a precise record when inspecting the package contents. 2.2 Additional Items Required for Installation Several additional tools and items will be required before proceeding with the field site installation. These are: Equipment available from Mercury Instruments: Mercury Instruments programmer cable as illustrated in Figure 2-1. MP-32 programmer software application program, available under Mercury Instruments stock number

14 Figure 2-1 Mercury Instruments Programmer Cables 2-2

15 Common off-the-shelf items required for installation: x86 or Pentium class laptop computer for configuration of the IMU-II/s. The operating system must be Microsoft Windows-98 or newer. The computer must have an RS-232 serial port available. This is used to program the unit using the MP32 software and programming cable. Voltmeter (for troubleshooting). Hand tools, fasteners, mounting hardware, PVC pipe, etc. 2.3 Unit Assembly Dimensions Figure 2-2 Outside Enclosure Dimensions 2-3

16 Figure 2-3 Enclosure and Wire Gland Dimensions CAUTION If using metallic conduit connectors, the non-metallic enclosure does not provide grounding between the conduit connectors. Use grounding bushings and jumper wires to achieve the necessary grounding. Mounting of the unit is normally accomplished by bolting the enclosure to a wall or other support structure. The four mounting tabs are capable of accepting bolts of 5/16 (0.312 ) maximum diameter, although smaller bolts can be used with washers. Figure 2-4 provides an illustration of one of the enclosure mounting tabs. Figure 2-4 Enclosure Mounting Tab (1 of 4) 2-4

17 2.4 IMU-II/s Board Layout The IMU-II/s circuit board assembly is shown in Figure 2-5. Figure 2-5 Primary Components of the IMU-II/s Board 2-5

18 Various jumpers exist on the IMU-II/s board to enable different operating modes and options. Table 2-1 lists these jumpers and their purpose. JUMPER POSITION NOTES JP11 OPEN Shorting this input will force the unit to originate a call if the unit has been programmed to originate calls. JP3 A-B For applications that require the DSR control line to have RS- 232 voltage levels ( 9V) JP3 B-C For applications that require the DSR control line to have +5V and 0V voltage levels. JP4 OPEN Momentary short will reset unit and clear data memory JP7 OPEN Used for factory testing JP9 SHORTED When shorted, the unit will respond to incoming RING signals from the phone line interface if the unit has been programmed to answer incoming calls. JP8 A-B Always keep in the A-B position. JP14 A-B Always keep in the A-B position. JP15 A-B Always keep in the A-B position. 2.5 IMU-II/s Block Diagram Table 2-1 IMU-II/s Circuit Board Jumper Configuration Figure 2-6 Block Diagram of the IMU-II/s 2-6

19 2.6 Power Supply Board Figure 2-7 AC Power Supply Board The larger circuit board in the unit provides the regulated DC power source for the IMU- II/s. Here is a brief description of these components: Fuse F1: Serves to protect both the user and the electronics in case of a surge or overload condition. Terminal Block: Entry point for the AC mains power. Three conductors are necessary for the connection: AC line, AC line, and Earth Ground. Transformer T1: Converts the AC mains power to a lower voltage level that can then be utilized by the regulator electronics. In addition, the transformer provides isolation between the primary (high voltage) and the secondary (low voltage) for user safety. 2-7

20 Voltage selector S1: Selects operation between 115 and 230 VAC Bridge Rectifier DB1: Provides full-wave rectification of the AC power signal from the transformer, which results in a pulsating DC waveform. Capacitors C1, C2, C7: Serves to smooth-out the ripples from the pulsating DC power signal coming from the bridge rectifier. Voltage Regulator U1: Converts the filtered DC power signal to a highly regulated 5v output voltage that varies relatively little regardless of the applied load. LED D8: Provides a simple indicator to the user that the power supply is operating. Caution is advised however since failure of this light to illuminate does not necessarily mean that the AC mains power is absent. It should always be assumed that the AC mains power is present at the terminal block until confirmed otherwise. Connector J3: J3 is the connector that routes the AC power status signal to the IMU-II/s board. This same connector also provides a +9.5V power source for external devices in some applications. Maximum current is 1000 ma. Connector J2: J2 is the connector that routes +5V power to the IMU-II/s board. Battery Holders BATT1, BATT2: These holders are optional. Two 3.6V lithium C batteries are installed here to provide backup power when the main AC line fails. Surge Protectors D1, D4, D5: Protects the circuitry from damage during high input voltage conditions, such as those caused by lightning strikes. Jumper Block JP1: For this application there should be a jumper block located between the A and B terminals

21 Figure 2-8 Block Diagram of the Power Supply Board 2.7 AC Power Cable Wiring Connection Removal of the safety shield is only to be performed after it has been confirmed that the AC mains power has been disconnected at the source. 2-9

22 Figure 2-9 Metal Safety Shield Entry for the AC mains power is at the right-hand side conduit hole. Three connection points are available at terminal block TB1: AC Line, AC Line, and Earth Ground (see Figure 2-10). It is mandatory that an earth ground connection be made to protect service personnel from the possibility of an electric shock hazard. In addition, the metal safety shield must be replaced before AC power is applied to guard against accidental contact with components carrying high voltage potentials. Figure 2-10 Routing and Connection of AC Mains Power

23 2.8 AC Voltage Selection Refer to Figure 2-10 for the location of the line voltage selector switch. Select either 115 or 230 VAC, depending upon the actual line voltage to be used. CAUTION It is extremely important that the line voltage selector switch setting matches the actual line voltage. Damage or personal injury could result if the setting is incorrect! 2.9 Lithium Backup Battery Installation Battery backup is an optional feature that allows the IMU-II/s to continue normal operation during a power failure. There are two C type battery holders located on the power supply board. NOTE Only 3.6V lithium batteries should be used. Standard alkaline or NiCad batteries will not provide enough voltage to operate the unit. See Chapter-7 for the recommended battery type. NOTE The unit will begin to operate as soon as the backup batteries are installed. It is best to prepare the unit to operate from AC power before installing the batteries. AC power should be applied soon after the batteries are installed. This will preserve the life of the batteries. 2-11

24 2.10 Electrical Block Diagram Figure 2-11 Electrical Block Diagram 2.11 Wiring External Devices to the IMU-II/s WARNING All alarm or pulse inputs must be contact closures only, such as mechanical switches or open-collector transistor outputs. Do not connect devices that produce voltages, such as amplifiers, or damage may result. NOTE Use the left-hand cable entry hole for alarm, pulse and communications signals. The right-hand cable entry hole should only be used for the AC power lines. Figure 2-12 depicts typical connections to some of these alarm inputs. Here is how the IMU-II/s processes these inputs. Any input can cause the IMU-II/s to place an immediate call to the central computer, but only if the IMU-II/s has been configured to call in

25 Alarm Inputs #1 and #2 accept Form-A (normally open) contacts. The IMU-II/s can be programmed to place an immediate call when either input closes. If an immediate call is not allowed, the alarm condition(s) will be reported on the next call to the central computer. If the IMU-II/s has been configured to collect pulse information from these inputs then they cannot be used for alarm monitoring. You can however use one input for pulse counting and the other for alarm monitoring. In this case Alarm Input #1 must be used for pulse counting. The General Alarm input is wired in parallel with the CALL jumper JP11. Momentarily closing this connection will cause the unit to place an immediate call to the central computer. Another input called TAMPER accepts a Form-B (normally closed) contact that, when opened, will place an immediate call to the central computer. In some unit assemblies this input will be connected to a magnetic reed switch that opens when the enclosure s door is opened. Figure 2-12 Connection of External Devices to the IMU-II/s Any external device that has an RS-232 serial port can be connected to IMU-II/s. In a special mode the central computer can exchange information directly with the serial device. The IMU-II/s does not support handshaking, so only the transmit (Tx), receive (Rx) and common lines are used. Baud rates of 300 to 9600 are supported. 2-13

26 2.12 Installing the Optional Dual-Port Multiplexer The optional dual-port multiplexer board (Mercury Instruments Stock # C-001) allows two external serial devices to connect to one IMU-II/s. Figure 2-13 Dual Port Multiplexer Board NOTE: There are 11 pins on the multiplexer board and 13 receptacles on the IMU-II/s board. The multiplexer board is installed so that Pin-1 of the multiplexer board inserts into TB-3 on the IMU-II/s board. Figure 2-14 depicts a typical wiring diagram for two serial devices

27 Figure 2-14 Wiring Two Serial Devices to the Multiplexer Board 2-15

28 2.13 Using the IMU-II/s Control Outputs The control output adapter board provides four individual digital signals that can be controlled remotely. These are low-current (10 ma max.) +5V logic signals. They can not be used to drive heavy loads directly such as relays or lamps. These outputs can only be controlled using the DC-2000 data collection program. This is discussed in Chapter-4. NOTE Whenever the IMU-II/s is powered up or reset, all four control outputs will be set to a high (+5V) level. Figure 2-15 Control Output Adapter Board A typical application is shown in Figure In this example another Mercury Instruments device known as a Remote Notification Module (RNM) is being controlled by the IMU-II/s. The RNM contains three bi-color LEDs (green and red) and an audible alarm. The state of each LED can be controlled individually using three of the four control outputs. Any time one or more of the LEDs changes color, those LEDs will begin flashing and the audible alarm will start beeping. The flashing and beeping can only be stopped by manually pressing a pushbutton switch on the RNM or by a remote switch wired to the RNM s terminal block. All three LEDs can be controlled together by simply connecting only one of the control outputs to all three inputs on the RNM. If the RNM requires power from the IMU-II/s, there is a separate 2-conductor cable that provides +9.5V for the RNM. On some RNM units there are several jumpers that must be configured to accept a +12V supply. The proper jumper settings and connections are shown in Figure

29 Figure 2-16 Typical Control Output Application - RNM NOTE Whenever the IMU-II/s is powered up or reset, the three LEDs on the RNM unit will be set to the GREEN level Quick Power-Up Check Connect the AC power lines to the power supply as discussed earlier. When powered up the green PROGRAM MONITOR light should light solidly. The red RECEIVE DATA light should light momentarily, then go out. The green PROGRAM MONITOR light should then start flashing once per second. This indicates the IMU-II/s is running. Turn off power for now until it is time to configure the unit (see Chapter-3). 2-17

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31 3 CONFIGURATION USING MP Mercury Instruments Programmer Cable Before placing a IMU-II/s into service, it is necessary to setup certain configuration parameters. Setting up the configuration requires a computer, Mercury Instruments programmer (MP32) software and a special programming cable. These items are listed below: 80x86 or Pentium-based personal computer with an available 9-pin serial port (COM1, COM2). Minimum operating system is Windows 98. Windows-based Mercury Instruments Programmer software, MP32, available under Mercury Instruments P/N: The MP32 software must be version or later. Mercury Instruments programming cable as shown in Chapter-2, Figure 2-1. The IMU-II/s stores configuration information in non-volatile memory. This information is not lost when power is removed or the unit is reset. Certain parameters are unique to each IMU-II/s, such as a phone number to call, ID number, etc. These parameters can be programmed prior to, during, or after installation of the device in the field, although it is normally most convenient to setup and test the configuration prior to installation. 3.2 MP32 Software Startup MP32 can operate as a stand-alone program or can work in conjunction with Mercury Instruments DC-2000 data collection software. When MP32 is started it will require a user name and password. If DC-2000 is present then the password must match one of the passwords from DC-2000 s list of authorized users. If this is a standalone application then leave the password blank. Figure 3-1 MP32 Login Screen After login a window will appear to allow you to select the type of Mercury Instruments device to program (Figure 3-2). Prior to selecting the device, select the Communication Configuration button. In the next window (Figure 3-3) select the Cable Comm Port as 3-1

32 the default, and make sure that the selected port matches the port that the cable is plugged into on the computer, such as COM1, COM2, etc. Then select the OK button. Figure 3-2 MP32 Start-Up Screen Figure 3-3 Communication Port Configuration Screen 3-2

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34 3.3.1 Remote Unit ID Each IMU-II/s must have a unique ID number. Legal six-digit values are FFFFFF (hexadecimal notation). Sequential numbering is not required, nor is it necessary to use any of the hexadecimal digits A, B, C, D, E, or F Destination This is the phone number that the IMU-II/s will dial to contact the central computer. Select the Phone Number button and enter up to 32 numeric digits (0-9, * or # ). You can also use the character B to force the IMU-II/s to wait for a dial tone. This is often used in cases in which the phone line is shared with another phone, or if the phone system requires a special code to gain access to an outside line. For example, the phone number string B9B will cause the IMU-II/s to go off hook, wait for a dial tone, then dial the digit 9, then wait for a second dial tone, then dial the phone number You can use the character D to introduce a delay in the dial out process. The character immediately following the D specifies the amount of delay in ½ second intervals. This number is a hexadecimal number in the range of 1 F (1 to 15 decimal). Therefore the delay can be specified from ½ second to 7 ½ seconds. For example, the phone number string D49D will cause the IMU-II/s to go off hook, wait 2 seconds, dial the digit 9, wait another 1 second, then dial the phone number Originate Calls Check this box if the IMU-II/s is allowed to originate phone calls to the central computer Respond to Voice Calls Check this box if the IMU-II/s is allowed to answer incoming phone calls Respond to SMS This feature applies only to wireless products Maintain Internet Connection This feature applies only to wireless products Dialer Type This is normally set to Tone but can be set to Pulse for older phone systems Dual Port This selection allows two external RS-232 devices to be connected to the IMU-II/s using the optional dual-port multiplexer board described in Chapter-2. If the Dual Port box is checked then two other selections are enabled. The first selection allows the IMU-II/s to wait a certain number of seconds to receive a port select command from the central computer, which will be discussed in Chapter-5. If no command is received within this time frame, the IMU-II/s will select a port based on the second selection

35 The second selection allows the IMU-II/s to select a port by itself if no port select command is received. The choices are Port-1, Port-2, Alternate or None. If Alternate is selected then the port selection will alternate with every call. The first call will go to Port-1, the second call to Port-2, the third to Port-1 and so on. See Chapter-5 for more information. If NONE is selected then the call will be terminated Firmware Version The firmware version is a value that is updated on the screen whenever a Read operation is performed. This is not a parameter that can be modified by the user Answer RING Count If the IMU-II/s has been configured to answer incoming calls you can specify how many RINGs must occur before answering the call. This is normally set to 1 but in cases in which the phone line is shared it might be necessary to set the number of rings higher. For instance if the IMU-II/s shares a line with a business phone you might want the IMU- II/s to answer on the 5 th ring. This would allow the IMU-II/s to answer calls after normal business hours Time Interval Size If the IMU-II/s is to be used for counting pulses, those pulses will be counted over a specific period of time from 1 to 60 minutes in length. The total count from each input at the end of that time period will be saved as a record in memory, and the counting process will start over. When these records are reported to the DC-2000 data collection software, each period will have a time-of-day associated with it. Therefore these records are referred to as time-tagged intervals. A shorter time period allows minor changes to be observed more clearly but also causes more storage space to be used. The IMU-II/s will notify DC-2000 when there is less than 25% of storage memory remaining. If the data is not recovered in time, the oldest records will be overwritten with new records. There is space for about records if only one input is used or 6000 records if both inputs are used Primary Call Retry Rate If the IMU-II/s is programmed to originate a call, and the call is unsuccessful for any reason, it will try again at a later time. The IMU-II/s can be programmed to wait from 1 to 15 minutes between each attempt Primary Call Retry Count This is the number of times (15 maximum) the IMU-II/s will try to repeat a call at the Primary Call Retry Rate, discussed previously. After this, calls will be attempted at the Secondary Call Retry Rate, discussed next Secondary Call Retry Interval After the Primary Call Retry Count has expired, the Secondary Call Retry Interval defines the time between each additional attempt, in 1-hour increments up to a maximum of 15 hours. There is no limit to the number of times the IMU-II/s will attempt to place a call at this rate. Once a call is successful, the IMU-II/s will return to using the primary retry rate and count. 3-5

36 Counter/Status Input-1 If Input #1 of the IMU-II/s s terminal block is to be used for counting pulses, select Data. If Input #1 is to be used to monitor an alarm or status switch, select Alarm. If the IMU- II/s is allowed to originate a call when an Alarm #1 condition occurs, the primary phone number will be used. This is shown to the right for reference and is a copy of the Destination number near the top of the screen. A special mode called Transparent Mode is discussed in detail in Chapter-5. In this mode the IMU-II/s can send readable text strings to the computer to describe the current alarm status, such as * CUSTOMER ALARM-1 *, * TAMPER ALARM *, etc. If this is desired, check the Alarm String Download box. You can also define a custom text string for Alarm #1 up to 20 characters in length, such as High Pressure Counter/Status Input-2 If Input #2 of the IMU-II/s s terminal block is to be used for counting pulses, select Data. If Input #2 is to be used to monitor an alarm or status switch, select Alarm. If the IMU- II/s is allowed to originate a call when an Alarm #2 condition occurs, you can define a different phone number for this condition only. However, the destination doesn t necessarily have to be a computer. It might be the phone number of a pager, cell phone or warning device to alert someone of a serious situation. A special mode called Transparent Mode is discussed in detail in Chapter-5. In this mode the IMU-II/s can send readable text strings to the computer to describe the current alarm status, such as *CUSTOMER ALARM-2 *, * TAMPER ALARM *, etc. If this is desired, check the Alarm String Download box. You can also define a custom text string for Alarm #2 up to 20 characters in length, such as Gas Leak. NOTE If one input is to be used for data and the other for alarm monitoring, then always use Input #1 for data and Input #2 for alarm

37 3-7

38 3.4.5 Stop Bits This value must match the number of stop bits used by the external RS-232 device. 3.5 Serial Port-2 Screen If you have selected Dual Port mode (discussed earlier), then select the SERIAL PORT 2 tab to continue the configuration. All settings are identical to those for Serial Port 1 except for the Port Select ID. You must assign a unique ID number to the device connected to Port-2. This will allow the central computer to distinguish between the two devices. Legal six-digit values are FFFFFF (hexadecimal notation). Sequential numbering is not required, nor is it necessary to use any of the hexadecimal digits A, B, C, D, E, or F. 3.6 Cellular Settings Screen This screen applies only to wireless products. 3.7 Programming the IMU-II/s 1) Attach the programming cable to an available serial communications port or USB port on the computer. Make sure MP32 is configured to use this port. 2) Attach the opposite end of the interface cable to the 4-position connector (J8) on the IMU-II/s board. The connector is keyed and can only insert in one direction. 3) Apply power to the IMU-II/s. The green PROGRAM MONITOR light should light solidly. The red RECEIVE DATA light should light momentarily, then go out. The green PROGRAM MONITOR light should then start flashing once per second. This indicates the IMU-II/s is running. 4) Once the parameters have been entered (or read in from a previously-saved configuration file), select the PROGRAM button to start programming the IMU- II/s. Status messages will appear in the lower left-hand corner of the screen. If the IMU-II/s is busy it could take up to 30 seconds to respond to the program command. If communications cannot be established within several minutes, check your cable and serial port, and try again. 5) When programming has completed, unplug the 4-pin connector of the serial cable from the J8 connector on the IMU-II/s board. The IMU-II/s is now ready to be put into service

39 4-1

40 On the next screen select the Data Collection process. Figure 4-2 Changing the Data Collection Configuration On the next screen (Figure 4-3) select the Analog Modem Ports tab. The IMU-II/s operates at 2400 baud but can shift down to 1200 baud if needed. Therefore you will need at least one 2400 baud MODSMOD modem card in the Mercury Instruments MODSMOD chassis. In the example shown in Figure 4-3 we have configured DC-2000 for a 9600-baud MODSMOD card on channel-1 using a Mercury Instruments software driver. The baud rate selection box near the bottom of the screen is the baud rate between the computer and the MODSMOD card, not between the MODSMOD and the IMU-II/s. This baud rate is determined by a set of jumpers on the MODSMOD card. Contact Mercury Instruments for more information. The 9600 card will downshift to 2400 baud when the IMU-II/s calls in

41 Figure 4-3 Configuring DC-2000 for Phone Line Connections 4-3

42 4-4

43 On the final screen you can define specifically when the device should call in. In Figure 4-6 the IMU-II/s will call in at regular 8-hour intervals starting at 14:00:00. Select the Apply button to make the changes permanent. Figure 4-6 Defining the Call Profile Parameters 4-5

44 4-6

45 The process of setting up an account is made easier by starting with a default account to be used as a template. In Figure 4-8, a template for an IMU product has been selected. Double-clicking on this selection will bring the user to another level where the account information is entered. Figure 4-8 Selecting a Default Account 4-7

46 Figure 4-9 illustrates one of the seven tabs or folders that can be accessed at this level. It is important to select the correct number of data inputs and to instruct the remote device to Send Latest data only. Some of the fields (i.e. Battery Information) are not critical since they exist primarily as a convenience for the system operator. Figure 4-9 Configuration Setup Screen 4-8

47 Figure 4-10 below illustrates the configuration for the data inputs. It is critical that the interval size setup in DC-2000 matches the interval size that was programmed into the memory of the IMU-II/s (Chapter-3). It is possible to assign various names to the data inputs. In the example below, it has been called Corrected Volume. Figure 4-10 Data Input Configuration Screen 4-9

48 Proper configuration of the call information fields are essential to ensure that data will be collected and available for processing when expected. If the IMU-II/s is programmed to originate calls only, then it will not be possible to initiate outbound calls to the unit. Figure 4-11 Call Profile Screen

49 Alarms are of benefit to the user since they can be used to report unusual events that might require immediate attention. Alarms that are available for the IMU-II/s are: Magnetic Switch Alarm: On the IMU-II/s board is a jumper block JP11 labeled CALL. This is wired in parallel with positions 1 & 2 on the terminal block. Momentarily shorting either connection will cause the unit to place an immediate call to report a CALL switch alarm or MAG switch alarm. The phrase MAG originates from other Mercury Instruments products in which a magnetic reed switch is mounted against an inside wall of a non-metallic enclosure. The field technician can trigger a call without opening the enclosure by simply by holding a magnet to the outside wall of the enclosure. The alarm description can be changed to more accurately reflect the exact nature of the alarm, such as Open Valve or Call. Tamper Detect Alarm: If an external switch is connected to the TAMPER input on the IMU-II/s terminal block, this indicates that the switch is opened. In some unit assemblies this input will be connected to a magnetic reed switch that opens when the enclosure s door is opened. Customer Alarm 1: If an external switch is connected to the Input-1 input on the IMU- II/s terminal block, this indicates that the switch is closed. Active only if the input is configured as an alarm input. Customer Alarm 2: If an external switch is connected to the Input-2 input on the IMU- II/s terminal block, this indicates that the switch is closed. Active only if the input is configured as an alarm input. Unit Reset Alarm: Reports if the IMU-II/s has been reset, indicating that all previously collected data has been lost. Call Retry Alarm: Reports if the previous call attempt was not successfully completed. KYZ-1 Input Failure: Not used. KYZ-2 Input Failure: Not used. Queue 75% Full Alarm: Reported if the IMU-II/s data memory is 75% or more full. Clock Resync Alarm: Reported if the IMU-II/s s time-of-day clock has been corrected by more than 20 seconds. Remote Daily Volume Low Input-1,2: Reports if daily volume use is below limits. Remote Daily Volume High Input-1,2: Reports if daily volume use is above limits. Remote TTI Consumption Low Input-1,2: Reports if interval volume use is below limits. Remote TTI Consumption High Input-1,2: Reports if interval volume use is above limits. 4-11

50 AC-Off Alarm: This indicates that the signal connected to the Power Fail input has been in an off state for more than five minutes. The alarm description can be changed to more accurately reflect the exact nature of the indication, such as AC Power Lost. AC-On Alarm: This indicates that the signal connected to the Power Fail input has been in an on state for more than five minutes. The alarm description can be changed to more accurately reflect the exact nature of the indication, such as AC Power Restored. Low Battery Alarm: Not used. Figure 4-12 depicts the Hardware Alarm configuration screen. For each alarm condition that occurs you can elect to save that event in a trace file by checking the Save checkbox. The event can also be immediately displayed on DC-2000 s alarm handler screen by checking the Log checkbox. As each alarm condition is detected the IMU-II/s will decide whether to place an immediate call or to report the condition on the next scheduled call. If you wish to have an immediate call for an alarm then check the Immediate Alarm Notification checkbox. Note that there are some alarms that always result in an immediate call such as a unit reset. Once a particular alarm is configured, select the Apply button to make the changes permanent. You must do this for each alarm. Note: Changes made to any alarm configuration will not go into effect until the next communication with the IMU-II/s

51 Figure 4-12 Hardware Alarm Configuration Screen 4-13

52 4.5 Altering the Control Outputs of the IMU-II/s The IMU-II/s provides up to four digital output signals that can be controlled from DC using the Relay Information screen. The term relay really refers to any device that can be turned on or off. Figure 4-13 Relay Information Screen On the IMU-II/s board is an adapter board attached to the J2 connector. This is discussed in Chapter-2. On this board is a 5-position terminal block: one connection for each output and a common ground signal. The Relay Information screen refers to Relay numbers 1,2 3 and 4. These correspond to terminal block positions 1,2,3 and 4 on the adapter board

53 Set the Relay Limit box to the number of outputs needed. Then for each output select the ADD button to include it in the Relay List. You can change the Relay Description to something more meaningful, such as Exhaust Fan or Circulation Pump. The ADD button adds relays in ascending order (1,2,3,4) and the DELETE button only deletes in descending order (4,3,2,1). NOTE If you define only one relay you must use Output #1 on the IMU-II/s. If you define two relays you must use Outputs #1 & #2 on the IMU-II/s. If you define three relays you must use Outputs #1, #2 & #3 on the IMU-II/s. To control each output, first highlight the name of the output in the Relay List, then select either the SET or RESET state. You must then select the APPLY button to make the change occur on the next call. NOTE The SET state results in a low (0V) output. If controlling a Mercury Instruments Remote Notification Module (RNM), the selected LED will turn RED. The RESET state results in a high (+5V) output. If controlling a Mercury Instruments Remote Notification Module (RNM), the selected LED will turn GREEN. Whenever the IMU-II/s is powered up or reset, all four control outputs will be set The changes will go into effect after the next successful communications with the IMU- II/s. If the call is not successful for any reason, the outputs will remain in their pre-call state and will not be altered until the next successful call. 4.6 Starting the Data Collection Process Once all IMU-II/s parameters have been defined you can start DC The appropriate modem channels will be initialized and the data collection process will begin. DC-2000 is a sophisticated program with many more features than were described here. Contact Mercury Instruments for more details or to arrange for training. 4-15

54 4-16

55 5 IMU-II/s OPERATION 5.1 Call Retry Strategy If the IMU-II/s is configured to originate calls and a call fails due to a data error or a phone line problem, the following retry strategy is followed: 1) The first retry will occur from 1 to 15 minutes after the original call, as defined by the Primary Call Retry Rate. 2) Subsequent calls will be made at the Primary Call Retry Rate until the Primary Call Retry Count is exhausted. 3) Once the Primary Call Retry Count is exhausted, subsequent calls will be made at the Secondary Call Retry Interval, which is defined in hours (1-15). There is no limit to the number of retries that can occur at the secondary rate. 5.2 What Causes the IMU-II/s to Call In? First, the IMU-II/s must be configured to originate calls. See Chapter-3 for programming instructions. Second, most alarms conditions can be configured to generate an immediate call. See Chepter-4 for this information. All calls are made to the primary phone number except for Alarm Input #2, which can be assigned a different phone number Alarm Condition For any alarm condition described in Chapter-4 the IMU-II/s can be programmed to place an immediate call into DC Some alarms such as the TAMPER or CALL alarm will always generate a call and cannot be disabled from DC Scheduled Call Each time the IMU-II/s communicates with DC-2000 it will be given a new time to call in. This schedule is defined by the user using the Call Profile Configuration Screen in DC (see Chapter-4). 5-1

56 5.3 Behavior when Originating a Call Figure 5-1 depicts the status LEDs on the IMU-II/s board. Figure 5-1 IMU-II/s s LED Indicators When power is first applied to the IMU-II/s or when the unit is reset the green program monitor LED will light steadily for several seconds then should start flashing slowly. If the IMU-II/s has been configured to originate a call, it will attempt to make a call to the primary phone number that was been programmed into the IMU-II/s. The reason for the call is to report a unit reset alarm. First, the IMU-II/s applies power to the cellular radio and will initialize the radio for data communications. During this time the program monitor LED will flash very slowly. When the radio is ready, the program monitor LED will flash twice as fast. The call in progress LED will light solid red. The phone number is dialed. If a connection is established with the central computer s modem the carrier detect LED will light solid red. If a link cannot be established the IMU-II/s will try again at a later time. If a modem connection is established the transmit data and receive data lights will blink randomly, indicating that data is being exchanged with the central computer. At the end of the call the call in progress and carrier detect LEDs will turn off. If the call was successful both of the good call LEDs will light solid red. If the call was not successful due to data errors or the loss of a connection the IMU-II/s will attempt to call again at a later time. The connection will be terminated if: The central computer terminates its connection No data has been received from either the computer or the external serial device for one minute The modem connection has been lost 5-2

57 All data has been successfully exchanged. 4 5 minutes after the initial power-up or reset all LEDs will turn off and the IMU-II/s will go into a low-power standby mode to conserve power. Additional calls can now be made. For each additional successful call both of the good call LEDs will light solid red for about 3 seconds before the unit returns to a low-power standby mode. 5.4 Behavior when Answering a Call If the IMU-II/s has been configured to answer a call it will: Wait for the preprogrammed number of RING signals to be received, then answer the call. The call in progress LED will light solid red. The IMU-II/s will attempt to establish communications with the central computer s modem. If this is successful the carrier detect LED will light solid red. If a link cannot be established within for 30 seconds the IMU-II/s will terminate the call. If a modem connection is established the transmit data and receive data lights will blink randomly to indicate that data is being exchanged. At the end of the call the call in progress and carrier detect LEDs will turn off. If the call was successful both of the good call LEDs will light solid red. The connection will be terminated if: The central computer terminates its connection No data has been received from either the computer or the external serial device for one minute The modem connection has been lost All data has been successfully exchanged. The good call LEDs will remain on for about 3 seconds before the unit returns to a lowpower standby mode. 5-3

58 5.5 Transparent mode for alarm status and maintenance When placing or receiving a call the IMU-II/s will always attempt to communicate with a Mercury Instruments system first (DC-2000 and a Mercury Instruments modem). After the modem connection is established the IMU-II/s will send a special ASCII string and wait several seconds for a valid Mercury Instruments response. It will repeat this sequence several more times. If a valid response is still not received the IMU-II/s switches to Transparent Mode. Transparent mode allows a non-mercury Instruments system (such as a standard AT modem and a computer running a terminal emulation program such as HyperTerminal) to use the IMU-II/s as an alarm-monitoring device. Pulse counting information is not available in this mode. It also allows the computer to communicate with a serial device connected to the IMU-II/s serial port. This is discussed in the next sections. If either of the IMU-II/s inputs has been configured as an alarm input, and the Alarm String Download function has been enabled, the IMU-II/s will immediately send one or more ASCII text strings relating to its status and alarm conditions. A single carriagereturn character (13 decimal or 0d hex) terminates each string. The first string sent is: UID# xxxxxx where xxxxxx is the 6-digit remote unit ID that was programmed into the IMU-II/s (see Chapter-3). If there are no alarm conditions, this is the only string sent. Otherwise any of the following strings may be sent relating to status and alarm conditions (see Chapter- 4 for a description of the various alarm conditions): * CALL RETRY ALARM * * UNIT RESET ALARM * * TAMPER ALARM * * CUSTOMER ALARM * * AC OFF ALARM * * AC ON ALARM * * CUSTOMER ALARM 1 * * CUSTOMER ALARM 2 * Note: * Customer Alarm 1 * and * Customer Alarm 2 * are default strings for Input #1 and #2, respectively. These strings can be changed when configuring the device. See Chapter-3. The IMU-II/s can also respond to several short command strings from the computer, shown in the next table. A single carriage-return character (13 decimal or 0d hex) must terminate all strings. Upper or lower case characters are accepted

59 COMMAND +-+CA +-+CLRALMS +-+SA +-+PAxxxxxx DESCRIPTION Clear Alarms. All alarm conditions that were present at the time of the call are cleared. If the IMU-II/s originated a call due to an alarm condition, this command will prevent the IMU-II/s from calling again. The IMU-II/s will respond with an OK string after the alarms are cleared. Send Alarms. The IMU-II/s will return the unit ID string followed by other strings describing any alarm or status conditions. See the previous discussion about these messages. Port Address, where xxxxxx is the 6-digit remote unit ID that was programmed into the IMU-II/s for the serial ports (see Chapter-3). This is used when communicating with two external serial devices connected to the IMU-II/s serial port. Table 5-1 Transparent Mode Status Commands 5.6 Transparent mode for one external serial device In addition to monitoring alarm conditions and counting pulses, an external serial device can be connected to the IMU-II/s. The device might be a pressure transducer, a temperature sensor, a gas volume corrector or any device capable of RS-232 communications. There is also an adapter card available that allows two serial devices to share the same port. This mode is discussed in the next section. Serial devices often have their own unique communications protocols of commands and responses, but the IMU-II/s does not have this information. However, the Transparent Mode allows the serial device to communicate directly with the system that is being called or is calling. That system should know how to communicate with the serial device. The IMU-II/s simply passes the information back and forth between the two devices. Chapter-2 describes the RS-232 serial port. Characteristics such as baud rate and parity are configured using the Mercury Instruments Programmer (MP32) software. This is discussed in Chapter-3. When placing or receiving a call the IMU-II/s will always attempt to communicate with a Mercury Instruments system first (DC-2000 and a Mercury Instruments modem). After the modem connection is established, the IMU-II/s will send a special ASCII string and wait several seconds for a valid Mercury Instruments response. It will repeat this sequence several more times. If a valid response is still not received, the IMU-II/s switches to Transparent Mode. If either of the IMU-II/s s inputs has been configured as an alarm input, and the Alarm String Download function has been enabled, the IMU-II/s will immediately send one or more ASCII text strings relating to its status and alarm conditions. The IMU-II/s can also respond to several short command strings from the computer. See the previous section about this. 5-5

60 After this, any characters received from the computer will be passed along to the serial device, and any characters received from the serial device will be passed along to the computer. The IMU-II/s will always be looking for the commands listed in Table 5-1. If any are received, they will be processed as described in the previous section. The connection will be terminated if: The remote computer terminates its connection No character has been received from either device for one minute The modem connection has been lost 5.7 Transparent mode for two external serial devices If using a dual port multiplexer, the +-+PAxxxxxx command allows the computer to select one of the two ports. See Chapter-3 for more information about dual port mode. For example, if the primary unit ID is (which is also the ID for Serial Port-1), and the ID for Serial Port-2 is , then the command to select Port-2 would be The IMU-II/s will respond with the string +-+PA CONNECTION WITH PORT NOW TRANSPARENT After this, any characters received from the computer will be passed along to the serial device, and any characters received from the serial device will be passed along to the computer. The IMU-II/s will always be looking for the commands listed in Table 5-1. If any are received, they will be processed as described in the previous section. For incoming calls, the IMU-II/s can be configured to select a port without the need for the Port Address command. See Chapter-3 for more information

61 6 SAFETY, HAZARDOUS AREAS, ESD PRECAUTIONS Hazardous Area Classification At the time of this publication no hazardous area safety approvals have been received for the IMU-II/s product. It is therefore necessary to ensure that the product is only installed at locations that are classified as safe area sites. Safety barriers must be utilized if it becomes necessary to route any cables into a hazardous area boundary. Refer to the U.S. National Electrical Code (NEC) book, article 510, as well as any relevant local ordnance for guidance with hazardous area wiring. It is the responsibility of the user to ensure compliance with regulations regarding hazardous area locations. This may require the site to be inspected by a certified electrician to maintain full compliance. ESD Handling Precautions Any electronics device contains components sensitive to ESD (electrostatic discharge). For example people experience up to 35kV ESD, typically while walking on a carpet in low humidity environments. In the same manner many electronic components can be damaged by less than 1000 volts of ESD. For this reason you must observe the following handling precautions when servicing this equipment: Always wear a conductive wrist strap. Eliminate static generators (plastics, styrofoam, and so on) in the work area. Remove nylon or polyester jackets, roll up long sleeves, and remove or tie back loose hanging neckties, jewelry, and long hair. Store and transport all static sensitive components in ESD protective containers. Disconnect all power from the unit before ESD sensitive components are removed or inserted, unless noted. Use a static safeguarded workstation, which can be set up by using an anti-static kit (Motorola part number A82). This kit includes a writes strap, two ground cords, a static control tablemat, and a static control floor mat. The Motorola part number for a replacement wrist strap that connects to the tablemat is A59. When anti-static facilities are unavailable, use the following technique to minimize the chance of damaging the equipment: o Let the static sensitive component rest on a conductive surface when you are not holding it. o When setting down or picking up the static sensitive component, make skin contact with a conductive work surface first and maintain this contact while handling the component. o If possible, maintain relative humidity of 70-75% in development labs and service shops. 6-1

62 6-2

63 7 TECHNICAL SPECIFICATIONS Model: IMU-II/s with Serial Port and Control Output Option, ACpowered. Mercury Instruments Stock # Firmware: Main crystal frequency: Modem crystal frequency: Storage Capacity: MHz MHz Approximately 12,000 records for one input Approximately 6000 records per input for two inputs. POWER Input Voltage: Selectable 90 to 140 volts (115 VAC setting) or volts (230 VAC setting). Line frequency: 50 or 60 Hz. Fuse ratings: 0.5A (500 ma) slow-blow fuse at position F1. Fuse type: 5x20mm. Littelfuse or equivalent (Mercury Instruments ) Backup Battery Type: Lithium C Cell: 3.6V, 5.5 AHr, Saft brand LSH14 or equivalent (Mercury Instruments ), two required. Outputs: 100 ma (for the IMU-II/s board) 9.5Vdc, 1000 ma (for external equipment) INPUTS Number of inputs: Wetting current per input: Wetting Voltage per Input: Maximum Voltage Drop / Resistance: (switch + cable, switch on) Active State: 1 Form-A alarm input, 1 Form-B alarm input, 2 Form-A alarm or pulse data inputs 175uA nominal 3 to 5 volts (nominal) 0.8VDC maximum, 1000 ohms maximum Must be active for greater than 40ms. (Inputs must be active for 40 msec minimum before new pulse can be detected.) 7-1

64 Data Input Rate: 600 counts / minute maximum SERIAL PORT Type: RS-232C Baud Rate: 300, 1200, 2400, 4800 or 9600 bps Data Bits: 7 or 8 Stop Bits: 1, 1.5, or 2 Parity: Even, Odd, or None Output levels: TX, DCD and DSR: 9V max. Input levels: RX and DTR: 15V max. CONTROL OUTPUTS Number of outputs: 4 Output levels: Low level < 0.5V, high level > 3.5V Output current: 10 ma max sink current per output. TELEPHONE INTERFACE Ringer Equivalence: FCC Registration Number: 0.3 B BK5USA DT-E Pulse Dialing Mode: Dial Rate: 10 pulses / second Percent Break: 60% Interdigit Interval: 800ms Dialing Digits: 31 (maximum) DTMF Dialing Mode: Deviation from standard tone: Dial Rate: Interdigit Interval: Output Level: Dialing Digits: Pause Mode: Communication Signals: Modulation Standards : Data Output Level: Modem Sensitivity: Telephone Connector: 0.73% maximum 3.3 digits / second 150ms -6dBm (nominal) 31 (maximum) Programmable CCITT V.22bis (2400 bps) CCITT V.22 (1200 bps) Bell 212A (1200 bps) Bell 103 (300 bps) Less than -9dBm (fixed) -40dBm (minimum) 4-conductor RJ-11C 7-2

65 MECHANICAL Weight: Dimensions: Without lithium batteries: 3.6 pounds (1.6 Kg) With lithium batteries: 3.75 pounds (1.7 Kg) 6.91 x 8.50 x 4.25 (17.6 cm x 21.6 cm x 10.8 cm) Operating temperature range: -22 to +140 Fahrenheit (-30 to +60 Celsius) 7-3

66 7-4

67 8 ASCII-HEX-DECIMAL CONVERSION CHART 8-1