Operating Manual. Digital Transducer Electronics AED9101D Basic device for AD103C with RS 232, RS 422, RS 485. English. I

Transcription

1 Operating Manual English Digital Transducer Electronics Basic device for AD103C with RS 232, RS 422, RS 485 I en

2 1 Safety instructions Markings used Symbols on the device The marking used in this document Introduction Scope of supply Application Design and function Mechanical installation Electrical connection Transducer connection Six-wire circuit (standard mode of operation) Four-wire circuit Connecting the supply voltage Connection to a PC Connection via RS Connection via RS Connection via RS Using several AEDs (bus mode with RS 485) Connecting the diagnostic bus Trigger input Cable connection via the PG gland Ground (GND) and shield wiring Selling on, waste disposal and environmental protection Index I en

3 1 Safety instructions Appropriate use The device is to be used exclusively for measurement tasks and directly related control tasks within the application limits detailed in the specifications. Use for any purpose other than the above is deemed to be non-designated use. Any person instructed to carry out installation, commissioning or operation of the device must have read and understood the Operating Manual and in particular the technical safety instructions. In the interests of safety, the device should only be operated by qualified personnel and as described in the Operating Manual. It is also essential to comply with the legal and safety requirements for the application concerned during use. The same applies to the use of accessories. The device is not intended for use as a safety component. Please also follow the instructions in the "Additional safety precautions" section. Proper and safe operation requires proper transportation, correct storage, siting and mounting, and careful operation. Operating conditions Protect the device from direct contact with water. Protect the device from moisture and weather such as rain or snow. The protection class of the device is IP65 (DIN EN 60529). Do not expose the device to direct sunlight. Comply with the maximum permissible ambient temperatures and the data on maximum humidity as stated in the specifications. I en 3

4 The device must not be modified from the design or safety engineering point of view except with our express agreement. In particular, any repair or soldering work on motherboards (replacement of components) is prohibited. When exchanging complete modules, use only original parts from HBM. The device is delivered from the factory with a fixed hardware and software configuration. Changes can only be made within the possibilities documented in the manuals. The device is maintenance free. Please note the following points when cleaning the housing: - Disconnect the device from all current and voltage supplies before cleaning it. - Clean the housing with a soft, slightly damp (not wet!) cloth. Never use solvent as this could damage the labeling or the housing. - When cleaning, ensure that no liquid gets into the device or connections. In accordance with national and local environmental protection and material recovery and recycling regulations, old equipment that can no longer be used must be disposed of separately and not with normal household garbage, see Chapter 7, page 31. Qualified personnel Qualified persons means persons entrusted with the installation, fitting, commissioning and operation of the product who possess the appropriate qualifications for their function. 4 I en

5 This includes people who meet at least one of the three following requirements: Knowledge of the safety concepts of measurement and automation technology is a requirement and as project personnel, they must be familiar with these concepts. As measurement or automation plant operating personnel, they have been instructed how to handle the machinery. They are familiar with the operation of the equipment and technologies described in this documentation. As commissioning engineers or service engineers, they have successfully completed the training to qualify them to repair the automation systems. They are also authorized to activate, ground and label circuits and equipment in accordance with safety engineering standards. Working safely The device must not be directly connected to the power supply system. The supply voltage must be between 10 and 30 V DC. Error messages should only be acknowledged once the cause of the error is removed and no further danger exists. Automation equipment and devices must be designed in such a way that adequate protection or locking against unintentional actuation is provided (e.g. access checks, password protection, etc.). For those devices operating in networks, safety precautions must be taken both in terms of hardware and software, so that a line break or other interruptions to I en 5

6 signal transmission do not cause undefined states or loss of data in the automation device. After making settings and carrying out activities that are password-protected, ensure that any controls that may be connected remain in a safe condition until the switching performance of the device has been tested. Additional safety precautions Additional safety precautions to meet the requirements of the relevant national and local accident prevention regulations must be taken in plants where malfunctions could cause major damage, loss of data or even personal injury. The scope of supply and performance of the device covers only a small area of measurement technology. Before starting up the device in a system, a project planning and risk analysis must first be implemented, taking into account all the safety aspects of measurement and automation technology so that residual dangers are minimized. This particularly concerns personal and machine protection. In the event of a fault, the relevant precautions must establish safe operating conditions. General dangers of failing to follow the safety instructions The device is state of the art and reliable. The device may give rise to residual dangers if it is inappropriately installed and operated. 6 I en

7 2 Markings used 2.1 Symbols on the device CE mark The CE mark enables the manufacturer to guarantee that the product complies with the requirements of the relevant EC directives (the Declaration of Conformity can be found on the HBM website ( under HBMdoc). Statutory waste disposal mark In accordance with national and local environmental protection and material recovery and recycling regulations, old devices that can no longer be used must be disposed of separately and not with normal household garbage. Also see Section7 on page The marking used in this document Important instructions for your safety are specifically identified. It is essential to follow these instructions in order to prevent accidents and damage to property. Symbol Note Important Meaning This marking draws your attention to a situation in which failure to comply with safety requirements could lead to damage to property. This marking draws your attention to important information about the product or about handling the product. I en 7

8 Symbol Tip Emphasis See STP; Meaning This marking indicates application tips or other information that is useful to you. Italics are used to emphasize and highlight text and identify references to sections, diagrams, or external documents and files. Bold italics indicate inputs or commands sent to the device. 8 I en

9 3 Introduction 3.1 Scope of supply Quick start guide (basic device) A PDF of this operating manual is available on the HBM website ( under HBMdoc at Digital weighing electronics. 3.2 Application digital transducer electronics are part of the AED component family that digitally conditions signals from mechanical transducers and networks them with bus capability. They include digital amplifier boards, basic devices with serial interfaces, and intelligent sensors with integrated signal conditioning. Using digital transducer electronics, you can connect SG 1 transducers in a full bridge circuit directly to a computer or a PLC. This enables you to configure complete measuring chains quickly and with little extra work. The basic device takes AD101B or AD103C amplifier boards. It provides mechanical protection, shields the amplifier board (EMC protection) and allows you to select RS-422 (factory setting), RS-485 or RS-232 serial interfaces. An amplifier board is not included in the scope of supply of the basic device, and must be ordered separately. 1) Strain gauges I en 9

10 transducer electronics is shortened in the following text to AED (digital transducer electronics). The AED_Panel32 PC software is available to facilitate parameter settings, to display dynamic measurement signals and for comprehensive analysis of the system. Download your (free) software from the HBM website, at Digital weighing electronics: Software. The AED commands are described in the online Help of this program. The DWS2103 digital indicator can be connected to all AED basic devices and supports all the implemented functions. Tip All the factory settings are stored in the amplifier, where they are power failsafe and cannot be changed. The factory settings can be restored at any time, using the TDD0; command. Further information can be found in the online Help of the AED_Panel32 program. 10 I en

11 4 Design and function The AED basic device extends the functionality of AD amplifier boards and provides: mechanical protection (IP65) the voltage supply for the amplifier board and transducer excitation bridge excitation for transducers with a total bridge resistance of 40 to 4000 a choice of RS-422, RS-485 and RS-232 serial interfaces an EMC-tested combination of basic device and AD101B or AD103C amplifier boards Diagnostic bus The amplifier board is a plug-in board, with two plug connections for inserting into the carrier board of the basic device. The basic device contains terminals for transducer, power supply and interface connection, slide switches for interface selection and the voltage stabilizer. The connection cables exit the housing via PG glands on the side. I en 11

12 1 Transducer connection 2 Interface settings 3 RS 485 bus termination 4 AD10x amplifier connection 5 Terminals for interface, supply voltage, trigger input and diagnostic bus Fig. 4.1 Mechanical construction 12 I en

13 5 Mechanical installation Conditions on site Protect the device from direct contact with water. Protect the device from moisture and weather such as rain or snow. The protection class of the device is IP65 (DIN EN 60529). Do not expose the device to direct sunlight Comply with the maximum permissible ambient temperatures and the data on maximum humidity as stated in the specifications. Mounting position The device can be mounted in any position. Installation Mount the device with two bolts with an outside diameter less than 4.4mm. Remove the lid of the housing to reach the mounting holes. I en 13

14 6 Electrical connection Note Electronic components are sensitive to electrostatic discharge (ESD). So you must discharge your own static electricity before opening the device. We recommend wearing an antistatic band (a conductive wristband) and using a conductive base. The required power supply is an extra-low voltage ( V DC ) with safe disconnection from the mains. Use shielded cables for the connecting cables to transducers and interfaces and connect the shield extensively to the device housings on both sides, not to the measurement ground or the supply voltage GND (use shielded terminals if necessary). Also see Section 6.8 on page 29. The cables for the supply voltage and the digital I/Os only need to be shielded if the cables are longer than 30 m, or are routed outside closed buildings (as per EN ). Please ensure when making connections that the cable wires do not project beyond the connection terminals (risk of short circuit) and do not lie on the amplifier board (risk of interference coupling). Please also make sure that the cable shield is properly connected to the PG gland, see Section 6.7 on page 28. Tip A connection diagram is attached inside the lid of the each basic device. 14 I en

15 6.1 Transducer connection You can connect the SG transducers in a full bridge circuit with a total bridge resistance of R B = With a transducer resistance of more than 1000, increased noise (measurement ripple) is to be expected. Transducer excitation is supplied in the basic device at 5V DC (bridge excitation voltage). When connecting several transducers, use the HBM VKKx junction box Six wire circuit (standard mode of operation) TE1 BU (3) GN (3') RD (4) WH (1) GY (2') BK (2) 1 HBM color code: BU = blue GN = green RD = red WH = white GY = gray BK = black 2 TE Fig. 6.1 Connecting transducers with a six-wire configuration in the basic device I en 15

16 Bridge excitation voltage (+) Sense lead (+) Measurement signal (-) Measurement signal (+) Sense lead (-) Bridge excitation voltage (-) Cable shield HBM color code BU (blue) GN (green) RD (red) WH (white) GY (gray) BK (black) Cable braid Connector 3 3' 4 1 2' 2 Housing Fig. 6.2 Transducer connections for a six wire configuration (HBM color and connection coding) The six-wire connection eliminates the effect of cable resistance. If you are using several transducers, make the six-wire connection up to the junction box Four wire circuit You have two connection options for transducers in a four-wire configuration: 1. Connection without an extension cable; the sense leads are bridged at the AED (Fig. 6.3). 2. Connection via a 6-wire extension cable; the sense leads are bridged in the transducer plug (Fig. 6.4). 16 I en

17 TE1 BU (3) GN (3') RD (4) WH (1) GY (2') BK (2) 1 2 HBM color code: BU = blue GN = green RD = red WH = white GY = gray BK = black TE Fig. 6.3 Connecting transducers with a four wire configuration without an extension cable Plug connection Transducer BU RD WH BK BU GN RD WH GY BK Cable to the transducer electronics Cable shield Fig. 6.4 Connecting transducers with a four wire configuration via a 6 wire extension cable When transducers are in a four-wire configuration, the connections for the sense leads must be connected to I en 17

18 the relevant connections for the bridge excitation voltage, i.e. 2' to 2 and 3' to 3 (Fig. 6.4 or Fig. 6.3). 6.2 Connecting the supply voltage The required voltage supply is an extra-low voltage ( V DC ) with safe disconnection from the mains. The maximum current consumption is: I max 100mA bridgeexcitationvoltageu B 5V bridgeresistancer B The actual current consumption depends on the level of the voltage supply and falls if the supply voltage is higher. TE1 1 2 TE4 1 RD WH U v V GND HBM color code: RD = red WH = white Fig. 6.5 Connecting the voltage supply The voltage supply leads can be routed together with the interface leads in one cable, or you can use a separate cable. If several AEDs are being supplied by one cable, note the voltage drop over the cable, so that the supply voltage to the AEDs does not get too low. The voltage 18 I en

19 drop depends on the supply current and on the line resistance. 6.3 Connection to a PC The basic device has an interface that can be operated in different configurations. You can select one of them for communication and data transmission. The choice is made via several DIP switches (S1 to S6). TE1 Bus termination TE S1 S2 S3 S4 S5 S6 RS 232 RS 422 RS wire RXD TXD DTR GND TB TA RB RA TB TA RB RA Equivalent interface cable designations: TA = T- TB = T+ RA = R- RB = R+ RS wire TB/RB TA/RA Fig. 6.6 Pin assignment and switch positions for the various interfaces Again use shielded cables for the interface cables, with the cable shield connected to the AED housing via the PG gland (see Sections 6.7 and 6.8, starting on page 28). The voltage supply can also be routed via this cable, which means that a 5 or 6-wire, shielded cable is required, depending on the interface. EMC reasons make it an advantage to use a double-shielded cable, such as HBM type , at m 2. I en 19

20 Interface configuration, DIP switches S1 to S6 Bus termination Fig. 6.7 DIP switch positions for the interface configuration The interface cable shield must not be connected to GND or to the supply ground, but to the housing of the AED (see Section 6.8 on page 29). The sections that follow contain more connection information. Note With longer cables (over 30m, only possible with RS 422 and RS 485), there is a risk that the individual bus nodes will have different ground potentials. The interface allows a maximum common-mode range of V, related to GND. If these values could possibly be exceeded, a separate line must be used to establish potential equalization between the bus nodes. A flexible cable with a conductor cross-section of at least 10mm 2 is the best choice for potential equalization. 20 I en

21 6.3.1 Connection via RS 232 The RS-232 interface allows an AED to be directly connected to a PC. The length of the cable is limited to 15m, and only one AED can ever be connected to each interface on the PC. Slide DIP switches S1 to S6 to the right (factory settings). The switch position for bus termination (termination) is not relevant. A cable routing example is shown in Fig PC RS 232 AED RS pin socket (solder view) RxD TxD GND TxD RxD Housing +U v (voltage supply) GND Housing Power supply Fig. 6.8 Connecting the AED to a PC via the RS 232 interface I en 21

22 6.3.2 Connection via RS 422 The RS-422 interface is a 4-wire interface with a maximum cable length of 1000m. Connecting the AED to the COM port of a PC (RS-232) requires an interface converter (HBM interface converter: 1-SC232/422B). Only one AED can ever be connected to each interface on the PC. Slide DIP switches S1 to S5 to the left, switch S6 and the switch for bus termination (termination) to the right (ON). The arrangement is the same as for the 4 wire version of the RS 485 interface, see Fig. 6.9 on page Connection via RS 485 You have two options for connection via the RS 485 interface: 1. RS-485 with a 4-wire connection This connection allows the full range of AED functions with a maximum cable length of 1000 m, and is the preferred option. 2. RS-485 with a 2-wire connection This connection also allows cable lengths up to 1000 m. However, only COF formats are then possible. So when starting up, the relevant COF command must be the first command sent. The command MSV?0; must not be used, as in this mode of operation, it is no longer possible to interrupt measurement output with command STP;. The interface converter must be set to 2-wire operation. In both cases, an interface converter is required at the PC's (RS-232) COM port (HBM interface converter: 1-SC232/422B). The advantage of this interface is that 22 I en

23 you can connect several AEDs to one interface on the PC (bus mode, see Section6.4). For 4 wire connection, slide DIP switches S1 to S6 to the left. For 2 wire connection, slide S1 to S4 and S6 to the left, S5 to the right. The switch position for bus termination (termination) is geared to the position of the AED in the bus system, see Section 6.4, page 23. PC COM port RxD TxD TxD GND RxD GND D-Sub plug, 9-pin (PC) PIN 2 = RxD 3 = TxD 5 = GND Interface converter RS RS 485 RS V RS 485 2/4-wire D-Sub socket, 9-pin (converter) PIN 2 = TxD 3 = RxD 5 = GND U v : 10 30V DC TA TB RA RB GND Uv RS 485 bus AED Equivalent designations: TA = T- TB = T+ RA = R- RB = R+ TA (blue) TB (black) RA (green) RB (gray) GND (white) U v (red, V DC ) Fig. 6.9 Connecting an AED (RS 422 or RS 4854 wire) to a PC via the HBM interface converter; also see Fig. 6.6 on page Using several AEDs (bus mode with RS 485) Up to 89 AEDs can be connected via the RS 485 interface to a common bus line, the total length of which can I en 23

24 be as much as 1000 m. Bus cabling for 4-wire mode is shown in Fig Line termination +5V 500 TB Line termination +5V 500 TA V 500 RB V RA TB T TA RB R RA TB T TA RB R RA... TB T TA RB R RA TxD on/off RxD TxD on/off RxD TxD on/off RxD PC = Master AED 1 = Slave 01 AED 89 = Slave 89 Fig Bus structure for a 4 wire bus with RS 485 The termination resistors (termination) of 500 marked in Fig at the (physical) ends of the bus system are important for the interface to work perfectly. These resistors ensure interference-free data transmission (no signal reflections) and defined potentials (voltage levels), if no data is transmitted over the bus (interface). The node at the start of the interface cable and the node at the end of the cable must have resistors available (bus termination), which in Fig is the PC and AED 89. The HBM interface converter already contains these bus termination resistors (cannot be switched off); in the AED (89 in the example), you must slide the DIP switch for bus termination to the right (ON) (see Fig. 6.7 on page 20 for the switch position). You must also activate bus 24 I en

25 termination with commands STR1;TDD1; in the relevant AED. If the DIP switch for bus termination is set to OFF, the commands will not take effect, i.e. bus termination will remain switched off! Important Termination resistors must only be activated at the end points of the interface cable. If resistors are also activated in between, this will weaken the signal and anything from interference to data transmission failure could result. RS 485 with a 2 wire connection Wiring and bus termination occur in the same way in the 2 wire connection with RS 485; it is merely lines RA and RB that are missing. Their function is taken up by lines TA and TB. Line TA/RA is also described as T/R and line TB/RB as T/R Connecting the diagnostic bus The diagnostic bus is used for analysis during the development of a measuring system and the encrypted exchange of data in a legal-for-trade configuration with digital indicator DWS2103. The bus is designed as a 2-wire bus with RS-485 (lines: TA/RA, TB/RB and GND). I en 25

26 TE1 1 2 TE4 1 Diagnostic bus TA/RA TB/RB GND Fig Diagnostic bus connection The interface setting of the bus is fixed, and cannot be changed: baud, 8E1 (8 bits, even parity, 1 stop bit). The same address as for the normal interface is used as the address. Bus termination resistors are not necessary for this bus, otherwise the same conditions apply to connection as for the normal RS-485 interface, see Section 6.3.3, starting on page 22. You can also use the HBM interface converter for connecting the RS-485 diagnostic bus to a PC COM port (RS-232). All the diagnostic bus functions are also available via the AED_Panel32 program (from Version V4.0.0); see the program's online Help for more information. 26 I en

27 6.6 Trigger input When using AD103C, you can connect an external sensor (light barrier, contact, etc.), to the trigger input, to enable you to use the trigger measurement function (see AD103C operating manual). Use command TRC to activate the input as an external trigger. Leave the input unassigned, if you do not need it. TE1 1 2 TE Trigger GND Fig Trigger input The trigger input GND is connected to the supply voltage GND. The trigger input has the following properties: Quiescent level Active edge High level Low level Input current Low High > Low 2 30 V 0 1V 3mA (when U v = 30V), 10k input resistance I en 27

28 6.7 Cable connection via the PG gland The connection between and other devices can only be made via a connecting cable with a shield grounded on both sides and metal connectors (or a metalized connector housing). Bring the screen extensively into contact on both sides at the PG gland and at the connector housing. If the device cannot be connected by a metal connector, you must lay the cable shield extensively to ground and housing ground, using a shielded terminal, for example. Also see Section 6.8. Note With longer cables (over 30m, only possible with RS 422 and RS 485), there is a risk that the individual bus nodes will have different ground potentials. In this case, a separate cable can be used to establish potential equalization between the bus nodes. A flexible cable with a conductor cross-section of at least 10mm 2 is the best choice for potential equalization. 28 I en

29 1 Remove the outer cable 2 sheath to the required length of wire L Push the screwed cable gland with the gasket and thrust collars over the end of the cable Shorten the cable shield and bare the stranded wires Strip the insulation from the cable termination and tin it 3 Ground sleeve 4 Radially fan out the cable shield Push the ground sleeve between the stranded wires and the cable shield until it comes to a stop, press the shield to the sleeve flange, cut off any excess Push the cable through the intermediate gland on the housing until it comes to a stop, bring the screwed cable gland forward and screw down tightly Fig Cable connection via PG glands 6.8 Ground (GND) and shield wiring GND or ground/0v must not be connected to cable shields, as otherwise the effectiveness of the shielding would be impaired. Extensively connect the cable shields on both sides to the device housing, not to the measurement ground or the supply voltage GND and 0V. If a suitable connector is not available at a node of the RS-485 bus, you can use shielded terminals, for example. I en 29

30 An example of cable shield and supply voltage wiring is shown in Fig Assignment at the PC (RS 232): 25 pin socket (solder view) 9 pin socket (solder view) Grounding/ power supply housing + - AED with RS TxD RxD RxD TxD GND U v TxD RxD GND 7 GND Shield grounding/housing Fig Connection of an AED to the supply voltage and a computer via the RS-232 interface 30 I en

31 7 Selling on, waste disposal and environmental protection Selling or passing a device on If the device is sold on, this Quick Start Guide must accompany the device. Waste disposal All electrical and electronic products must be disposed of as hazardous waste. The correct disposal of old equipment prevents ecological damage and health hazards. The electrical and electronic devices that bear this symbol are subject to European waste electrical and electronic equipment directive 2002/96/EC. The symbol indicates that, in accordance with national and local environmental protection and material recovery and recycling regulations, old devices that can no longer be used must be disposed of separately and not with normal household garbage. As waste disposal regulations may differ from country to country, we ask that you contact your supplier to determine what type of disposal or recycling is legally applicable in your country. Packaging The original packaging of HBM devices is made from recyclable material and can be sent for recycling. For ecological reasons, empty packaging should not be returned to us. I en 31

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33 8 Index 4 4-wire configuration, 16, wire connection, 16 A a basic box, 11 B Basic device, 11 Bus Bus line, 23 Bus structure, 24 Bus mode RS232, 21 RS485, 22, 23 Bus termination, 25 RS485 bus termination, 23 C Cable connection - serial interface, 19 Computer connection, 19 Connection to a computer, 19 D Diagnostic bus, 25 Diagnostic bus connection, 25 E Electrical connections, 14 I Interface, 19 Interface converter, 22 M Mechanical construction, 12, 13 Multi-channel measurement, 23 P PG gland, 14, 28, 29 Potential equalization, 19 Cable connection via PG, 28 I en 33

34 R RS232, 13, 19 RS422, 13, 19 RS485 quiescent level, 23 RS485 with 2-wire, 19 RS485 with 4-wire, 19 S Safety instructions, 3 Serial interface, 13 RS232, 9, 11, 19 RS422, 9, 11, 19 RS485, 11, 19 Supply voltage, AED9101C supply voltage, 29 Supply voltage cable connection, 29 AED9101C cable connection, 29 T Trigger input, I en

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36 Hottinger Baldwin Messtechnik GmbH. Subject to modifications. All product descriptions are for general information only. They are not to be understood as a guarantee of quality or durability. Hottinger Baldwin Messtechnik GmbH Im Tiefen See Darmstadt Germany Tel Fax: info@hbm.com measure and predict with confidence I en