CPCI-DIO48H & CPCI-DIO96H

Transcription

1 CPCIDIO8H & CPCIDIO96H DIGITAL INPUT/OUTPUT User s Manual Revision, March, Copyright, Measurement Computing Corporation

2 MEGAFIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data acquisition board model numbers, PCMDAS8, PCMDC, PCMDAC, PCMCOM, PCMCOM85, PCMDMM, PCMDAS6D/, PCMDAS6S/, PCMDAS6D/6, PCMDAS6S/6, PCIDAS6/6, Universal Library, InstaCal, Harsh Environment Warranty and Measurement Computing Corp. are registered trademarks of Measurement Computing Corp. IBM, PC, and PC/AT are trademarks of International Business Machines Corp. Windows is a trademark of Microsoft Corp. All other trademarks are the property of their respective owners. Information furnished by Measurement Computing Corp. is believed to be accurate and reliable. However, no responsibility is assumed by Measurement Computing Corp. neither for its use; nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corp. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by photocopying, recording or otherwise without the prior written permission of Measurement Computing Corp. Notice Measurement Computing Corp. does not authorize any Measurement Computing Corp. product for use in life support systems and/or devices without the written approval of the President of Measurement Computing Corp. Life support devices/systems are devices or systems which, a) are intended for surgical implantation into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in injury. Measurement Computing Corp. products are not designed with the components required, and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people. HM CPCIDIO##H.lwp

3 TABLE OF CONTENTS INTRODUCTION... INSTALLATION... I/O CONNECTIONS.... CABLES AND SCREW TERMINAL BOARDS.... CONNECTOR DIAGRAM.... SIGNAL CONNECTION CONSIDERATIONS CIOERB & SSRRACK CONNECTIONS... 6 SOFTWARE UNIVERSAL LIBRARY PACKAGED APPLICATION PROGRAMS REGISTER MAPS CONTROL & DATA REGISTERS FIRST PORT REGISTERS EMULATION MODE CONFIGURATION SECOND PORT REGISTERS THIRD PORT REGISTERS (CPCIDIO96H) FOURTH PORT REGISTERS (CPCIDIO96H)... 6 SPECIFICATIONS CPCIDIO96H CPCIDIO8H ELECTRONICS AND INTERFACING PULL UP & PULL DOWN RESISTORS TTL TO SOLID STATE RELAYS VOLTAGE DIVIDERS...

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5 INTRODUCTION The CPCIDIO96H and CPCIDIO8H are highdrive digital I/O boards. The CPCIDIO96H version has 96 bits organized into four bit groups. The CPCIDIO8H version has 8 bits organized into two bit groups. Each group is further divided into an 8bit port A, an 8bit port B, and an 8bit port C that can be split into separate bit nibbles, port CHI and port CLO. See Figure below. The digital output drivers are 7S chips that can sink 6 ma and source 5 ma. The input buffers are 7LS7 chips and have standard high input impedance of the 7LS series devices. On power up and reset, all I/O bits are set to input mode. If you are using the board to control items that must be OFF on reset, install pulldown resistors. There are open locations on the board where users can install SIP resistor networks for either pullup or pulldown.. Figure. CPCIDIO96H & CPCIDIO8H Block Diagram

6 INSTALLATION The CPCIDIO96H and CPCIDIO8H boards are completely plugandplay. There are no switches or jumpers on the board. All board addresses are set by your computer s plugandplay software. InstaCal is the installation, calibration and test software supplied with your data acquisition / IO hardware. Refer to the Extended Software Installation Manual to install InstaCal. If you need it, there is some online help in the InstaCal program. Owners of the Universal Library should read the manual and examine the example programs prior to attempting any programming tasks. NOTE: The CPCIDIO8H is not fieldupgradable to the CPCIDIO96H. I/O CONNECTIONS. CABLES AND SCREW TERMINAL BOARDS Both the CPCIDIO96H and the CPCIDIO8H use a pin, highdensity RobinsonNugent male connector (Figure ), but the CPCIDIO8H only makes use of half the available pins. For connection to the CPCIDIO96H, a CFF# cable is used to split the I/O lines into two, 5wire cable legs. One connector has pins to 5, the other has 5 to. The two I/O connectors can be connected directly to two CIOMINI5 or CIOSPADE5 screwterminal boards or one CIOTERM or SCB5 screwterminal board. See Figures and for pinout and configuration. A C5FF# cable is used for connection to the CPCIDIO8H. However, a CFF# cable can be used if necessary but only one of the 5wire legs is used. Connection may then be made to a CIOMINI5, CIOSPADE5, CIOTERM or SCB5.

7 . CONNECTOR DIAGRAM The I/O connector has pins. See Figure below for the board pinout. Figure. Pin Connector Pinout

8 Figure. Pin Translation Pins 5 to DI/O Signals CPCIDIO96H

9 BOARD S PIN I/O CONNECTOR CFFxx CABLE I/O PINS TO 5 SIGNAL CONDITIONING or 5PIN SCREW TERMINAL BOARD. I/O PINS 5 TO SIGNAL CONDITIONING OR 5PIN SCREW TERMINAL BOARD Figure. Cable CFF# Configuration CPCIDIO96H. SIGNAL CONNECTION CONSIDERATIONS All the digital inputs on the CPCIDIO96H AND CPCIDIO8H are LSTTL. The output signals are buffered high output drive TTL. Measurement Computing Corp. offers a wide variety of digital signal conditioning products for interfacing between high voltage and/or high current signals and the CPCIDIO96H or CPCIDIO8H. If you need control or monitor nonttl level signals with your board, please refer to our catalog or our web site for the following products: CIOERB series, electromechanical relay output boards CIOSERB series, A electromechanical relay output boards SSRRACK series solid state relay I/O module racks A description of digital interfacing is found in the Interface Electronics section. NOTE: These boards emulate the 855 chip. The 855 emulation initializes all ports as inputs on power up and reset. A TTL input is a high impedance input. If you connect another TTL input device the output, it could be turned ON or OFF every time the board is reset. To establish a consistent TTL level at powerup, use resistors tied to either +5V (pullup) or ground (pulldown). There are positions for pullup and pulldown resistor packs on the board. To implement these, please refer to the application section. 5

10 . CIOERB & SSRRACK CONNECTIONS The CPCIDIO96H board provides digital I/O in two major groups of 8 bits each (Each side of the CFFxx cable provides 8 bits). However, many popular relay and SSR boards provide only bits of I/O. The CIOERB and SSRRACK each implements a connector scheme where all 96 bits of the CPCIDIO96H board can be used to control relays and/or SSRs. This configuration is shown in Figure below. The bits of digital I/O on CPCIDIO96H connector pins 58 (base address + through +) control the first relay board. The bits on pins will control the second relay/ssr board on the daisy chain. The second leg of the CFF cable is configured the same way, so that the first bits on this leg control the first relay board and the second bits control the second relay board. Figure. CPCIDIO96H Relay Rack Cabling The scheme for the CPCIDIO8H is identical except that only one cable from the board itself is used (pins 5). 6

11 SOFTWARE We highly recommend that users take advantage of our Universal Library package's easytouse programming interfaces. However, if you are an experienced programmer, and wish to read and write directly to the board, we have provided a detailed register map in the next chapter.. UNIVERSAL LIBRARY The Universal Library provides complete access to the CPCIDIO96H and CPCIDIO8H functions from a range of programming languages. If you are planning to write programs, or would like to run the example programs for Visual Basic or any other language, please turn now to the Universal Library manual.. PACKAGED APPLICATION PROGRAMS Most packaged application programs, such as SoftWIRE, DAS Wizard and HPVEE have drivers for the CPCIDIO96H AND CPCIDIO8H. If the package you own does not appear to have drivers for the board, please contact us with the package name and the revision number from the install disks. We will research the package for you and advise you on how to use your board with the available driver. Some application drivers are included with the Universal Library package, but not with the application package. If you have purchased an application package directly from the software vendor, you may need to purchase our Universal Library and drivers. Please contact us for more information. 7

12 5 REGISTER MAPS 5. CONTROL & DATA REGISTERS BADR is an 8bit data bus for reading, writing and control of the emulated 855 chips operating in mode. Refer to Table 5 for register offsets. Table 5. CPCIDIO96H and CPCIDIO8H I/O Registers REGISTER READ FUNCTION WRITE FUNCTION BADR + First Port A Data First Port A Data BADR + First Port B Data First Port B Data BADR + First Port C Data First Port C Data BADR + No readback First Configuration Register BADR + Second Port A Data Second Port A Data BADR + 5 Second Port B Data Second Port B Data BADR + 6 Second Port C Data Second Port C Data BADR + 7 No readback Second Configuration Register The following registers apply to the CPCIDIO96H only BADR + 8 Third Port A Data Third Port A Data BADR + 9 Third Port B Data Third Port B Data BADR + A Third Port C Data Third Port C Data BADR + B No readback Third Configuration Register BADR + C Fourth Port A Data Fourth Port A Data BADR + D Fourth Port B Data Fourth Port B Data BADR + E Fourth Port C Data Fourth Port C Data BADR + F No readback Fourth Configuration Register The boards are designed to operate in Input / Output mode only (855 mode ). Strobed Input/Ouput (mode ) or BiDirectional Bus (mode ) are not supported. The following information describes mode operation. Upon powerup, the board is reset and defaults to the input mode. No further programming is needed to use the lines as inputs. 8

13 5. FIRST PORT REGISTERS FIRST PORT A DATA BADR + h READ/WRITE A7 A6 A5 A A A A A FIRST PORT B DATA BADR + h READ/WRITE B7 B6 B5 B B B B B FIRST PORT C DATA BADR + h READ/WRITE 7 6 C7 C6 5 C5 C C C C C CH CH CH CH CL CL CL` CL FIRST CONFIGURATION REGISTER BADR + h WRITE D D D D This register is used to configure the first ports as either input or output. The following paragraphs and Table 5 describe configurations for mode EMULATION MODE CONFIGURATION. Output Ports In mode configuration, each port can be configured for output, holding the data written to them. For example, to set first ports A, B and C to output mode, write the value h to BADR + (refer to Table 5 below). To read the current state of an output port s bits, simply read the address of that port.. Input Ports In mode configuration, ports can be configured as inputs, reading the state of the inputs lines. For example, to set first ports A, B and C to input mode, write the value Bh to BADR +. 9

14 Table 5. DIO Port Configuration Programming Codes D D D D Values Hex 8 9 A B 8 9 A B DIO Port Dec A B CU OUT OUT OUT OUT OUT OUT OUT IN OUT OUT IN OUT 8 OUT OUT IN 9 OUT OUT IN OUT IN IN OUT IN IN 6 IN OUT OUT 7 IN OUT OUT 8 IN IN OUT 9 IN IN OUT IN OUT IN 5 IN OUT IN 6 IN IN IN 7 IN IN IN Note: CU is PORT C upper nibble; CL is PORT C lower nibble. CL OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN 5. SECOND PORT REGISTERS SECOND PORT A DATA BADR + h READ/WRITE A7 A6 A5 A A A A A SECOND PORT B DATA) BADR + 5h READ/WRITE B7 B6 B5 B B B B B SECOND PORT C DATA BADR + 6h READ/WRITE C7 C6 C5 C C C C C CH CH CH CH CL CL CL CL

15 SECOND CONFIGURATION REGISTER BADR + 7h WRITE D D D D Refer back to Section 5. and Table 5 for information on this register. 5.5 THIRD PORT REGISTERS (CPCIDIO96H) THIRD PORT A DATA BADR + 8h READ/WRITE A7 A6 A5 A A A A A THIRD PORT B DATA BADR + 9h READ/WRITE B7 B6 B5 B B B B B THIRD PORT C DATA BADR + Ah READ/WRITE 7 6 C7 C6 5 C5 C C C C C CH CH CH CH CL CL CL CL THIRD CONFIGURATION REGISTER BADR + Bh WRITE D D D D Refer back to Section 5. and Table 5 for information on this register.

16 5.6 FOURTH PORT REGISTERS (CPCIDIO96H) FOURTH PORT A DATA BADR + Ch READ/WRITE A7 A6 A5 A A A A A FOURTH PORT B DATA BADR + Dh READ/WRITE B7 B6 B5 B B B B B FOURTH PORT C DATA BADR + Eh READ/WRITE C7 C6 C5 C C C C C CH CH CH CH CL CL CL CL FOURTH CONFIGURATION REGISTER BADR + Fh WRITE D D D D Refer back to Section 5. and Table 5 for information on this register.

17 6 SPECIFICATIONS 6. CPCIDIO96H Power consumption +5V Operating CPCIDIO96H Digital Input / Output Digital type Number of I/O Configuration per 8C55 Emulation Input low voltage Input high voltage Output low voltage (IOL = 6 ma) Output high voltage (IOH = 5 ma) Absolute maximum input voltages Powerup / reset state PullUp/PullDown Resistors Environmental Operating Temperature Range Storage Temperature Range Humidity Mechanical Card dimensions.a typical,.5a max Digital Outputs 7S Digital Inputs 7LS7 96 banks of 8 bits and banks of bits (855A mode emulation) Each port programmable as either input or output.8v max.v min.5v max.v min.5v, +5.5V Input mode (high impedance) Userinstalled. Dual footprint allows pullup or pulldown configuration. to 7 C to C to 95% noncondensing +5V U CPCI: 6.mm L x.mmw x.mm H Connector and Pin Out pin RobinsonNugent. Compatibility Pinout identical to PCIDIO96H Compatible with CIODIO96H using CFFxx

18 Pin Signal Name Second Port A Bit 7 Second Port A Bit 6 Second Port A Bit 5 Second Port A Bit Second Port A Bit Second Port A Bit Second Port A Bit Second Port A Bit Second Port B Bit 7 Second Port B Bit 6 Second Port B Bit 5 Second Port B Bit Second Port B Bit Second Port B Bit Second Port B Bit Second Port B Bit Second Port C Bit 7 Second Port C Bit 6 Second Port C Bit 5 Second Port C Bit Second Port C Bit Second Port C Bit Second Port C Bit Second Port C Bit First Port A Bit 7 First Port A Bit 6 First Port A Bit 5 First Port A Bit First Port A Bit First Port A Bit First Port A Bit First Port A Bit First Port B Bit 7 First Port B Bit 6 First Port B Bit 5 First Port B Bit First Port B Bit First Port B Bit First Port B Bit First Port B Bit First Port C Bit 7 First Port C Bit 6 First Port C Bit 5 First Port C Bit First Port C Bit First Port C Bit First Port C Bit First Port C Bit +5V GND Pin Signal Name Fourth Port A Bit 7 Fourth Port A Bit 6 Fourth Port A Bit 5 Fourth Port A Bit Fourth Port A Bit Fourth Port A Bit Fourth Port A Bit Fourth Port A Bit Fourth Port B Bit 7 Fourth Port B Bit 6 Fourth Port B Bit 5 Fourth Port B Bit Fourth Port B Bit Fourth Port B Bit Fourth Port B Bit Fourth Port B Bit Fourth Port C Bit 7 Fourth Port C Bit 6 Fourth Port C Bit 5 Fourth Port C Bit Fourth Port C Bit Fourth Port C Bit Fourth Port C Bit Fourth Port C Bit Third Port A Bit 7 Third Port A Bit 6 Third Port A Bit 5 Third Port A Bit Third Port A Bit Third Port A Bit Third Port A Bit Third Port A Bit Third Port B Bit 7 Third Port B Bit 6 Third Port B Bit 5 Third Port B Bit Third Port B Bit Third Port B Bit Third Port B Bit Third Port B Bit Third Port C Bit 7 Third Port C Bit 6 Third Port C Bit 5 Third Port C Bit Third Port C Bit Third Port C Bit Third Port C Bit Third Port C Bit +5V GND

19 6. CPCIDIO8H Power consumption +5V Operating CPCIDIO8H Digital Input / Output Digital type Number of I/O Configuration per 855 Emulation Input low voltage Input high voltage Output low voltage (IOL = 6mA) Output high voltage (IOH = 5mA) Absolute maximum input voltage Powerup / reset state PullUp/PullDown Resistors Environmental Operating Temperature Range Storage Temperature Range Humidity Mechanical Card dimensions. A typical,.6 A max Digital Outputs 7S Digital Inputs 7LS7 8 banks of 8 bits and banks of bits (855A mode emulation) Each bank programmable as either input or output.8v max.v min.5v max.v min.5v, +5.5V Input mode (high impedance) User installed. Dual footprint allows pullup or pulldown configuration. to 7 C to C to 95% noncondensing +5V U CPCI: 6.mmL x.mmw x.mmh Connector and Pin Out pin RobinsonNugent. Compatibility Pinout compatible with PCIDIO8H using Pins 5 of CFFxx. Pins 5 are N/C 5

20 Pin Signal Name Second Port A Bit 7 Second Port A Bit 6 Second Port A Bit 5 Second Port A Bit Second Port A Bit Second Port A Bit Second Port A Bit Second Port A Bit Second Port B Bit 7 Second Port B Bit 6 Second Port B Bit 5 Second Port B Bit Second Port B Bit Second Port B Bit Second Port B Bit Second Port B Bit Second Port C Bit 7 Second Port C Bit 6 Second Port C Bit 5 Second Port C Bit Second Port C Bit Second Port C Bit Second Port C Bit Second Port C Bit First Port A Bit 7 First Port A Bit 6 First Port A Bit 5 First Port A Bit First Port A Bit First Port A Bit First Port A Bit First Port A Bit First Port B Bit 7 First Port B Bit 6 First Port B Bit 5 First Port B Bit First Port B Bit First Port B Bit First Port B Bit First Port B Bit First Port C Bit 7 First Port C Bit 6 First Port C Bit 5 First Port C Bit First Port C Bit First Port C Bit First Port C Bit First Port C Bit +5V GND Pin Signal Name +5V GND 6

21 7 ELECTRONICS AND INTERFACING This brief introduction to the electronics most often needed by digital I/O board users covers a few key concepts. IMPORTANT NOTE WHENEVER AN 855 (OR EMULATION) IS POWEREDON OR RESET, ALL PINS ARE SET TO HIGHIMPEDANCE INPUT. FOLLOWING STANDARD TTL FUNCTIONALITY, THESE INPUTS WILL TYPICALLY FLOAT HIGH, AND MAY HAVE ENOUGH DRIVE CURRENT TO TURN ON EXTERNAL DEVICES. The implication of this is that if you have output devices such as solid state relays, they may be switched on whenever the computer is powered on or reset. To prevent unwanted switching and to drive all outputs to a known state after power on or reset, pull all pins either high or low through a. K resistor. 7. PULL UP & PULL DOWN RESISTORS Whenever the board is powered on or reset, the control register is set to a known state. That state is all ports go to the input state. The nature of the input means it will typically float high. However, depending on the drive requirements of the device you are driving, they may float up or down. Which way they float is dependent on the characteristics of the circuit and the electrical environment; and may be unpredictable. This is why it often appears that the board outputs have gone 'high' after power up. The result is that the controlled device gets turned on. That is why you need pull up/down resistors. Shown in Figure 7 is a digital output with a pullup resistor attached. The pullup resistor provides a reference to +5V. The value of.k ohms requires only. ma of drive current. If the board is reset and enters high impedance input, the line is pulled high. At that point, both the board AND the device being controlled will sense a high signal. Figure 7. Pullup Resistor If the board is in output mode, the board has enough power to override the pullup/down resistor's high signal and drive the line to volts. A pulldown resistor accomplishes the same task except that the line is pulled low when the board is reset. The board has enough power to drive the line high. 7

22 The boards have positions for pullup/down resistors that are contained in Single Inline Packages (SIPs). There are six SIP locations on the base board and six more locations on the mezzanine board Only the base board is present with a CPCIDIO8H. The mezzanine board is used only with the CPCIDIO96H version. The SIP resistor locations on the base board are marked FIRST PORT A, B and C and SECOND PORT A, B and C. They are located adjacent to the I/O connectors (Figure 7). The SIP resistor locations on the mezzanine board are marked THIRD PORT A, B and C and FOURTH PORT A, B and C. They are located between the connectors on the board (Figure 7). A.K, 8resistor SIP is made of eight.k resistors all connected with one side to a single common point, the other side of each to a pin protruding from the SIP. The common line to which all resistors are connected also protrudes from the SIP. The common line is marked with a dot and is at one end of the SIP. The SIP may be installed as pullup or pulldown. At each location, (A, B, and C on the boards), there are holes in a line. One end of the line is +5V (marked HI) the other end is GND (marked LO). The eight holes in the middle are connected to the eight lines of the port. A resistor value of.k is recommended. Our SIP part # is SPK.9C. Use other values only if you have calculated the necessity of doing so. Keep in mind that unconnected inputs float (typically, but not reliably, high). If you are using the board for inputs, and have unconnected inputs, ignore the data from those lines. You do not have to tie input lines, and unconnected lines will not affect the performance of connected lines. Simply mask out any unconnected bits in software. 8

23 Figure 7. CPCIDIO8H PullUp/PullDown Resistor SIP Locations Figure 7. CPCIDIO96H Additional PullUp/PullDown Resistor SIP Locations 9

24 7. TTL TO SOLID STATE RELAYS Many applications require digital outputs to switch AC and DC voltage motors on and off, or to monitor AC and DC voltages. These AC and high DC voltages cannot be controlled or read directly by the TTL digital lines of a PCIDIO##H. Solid State Relays, such as those available from Measurement Computing Corp. allow control and monitoring of AC and high DC voltages and provide up to VAC isolation. Solid State Relays (SSRs) are the recommended method of interfacing to AC and high DC signals. The most convenient way to use solid state relays and a PCIDIO##H board is to use a Solid State Relay Rack. An SSR Rack is a circuit board with input buffer amplifiers that are powerful enough to switch the SSRs. The buffer amplifiers and SSRs are socketed. The standard buffer amplifiers are inverting types, meaning that a low input from a DIO 855 outputs a high to the SSR which turns it on ( closes the SSR output). If desired, noninverting amplifiers can be specified The outputs of the PCIDIO##H are sufficient to drive SSRs directly. If desired, you can drive DROAC OR DRODC modules that are mounted on DIN rails. 7. VOLTAGE DIVIDERS If you wish to measure a signal that varies over a range greater than the input range of a digital input, use a voltage divider to drop the voltage of the input signal to the level the digital input can measure. Signal High Ohm's law states: Voltage = Current * Resistance R Thus, any variation in the voltage drop for Signal Vin Volts the circuit as a whole will have a proportional variation in all the voltage R V Vout drops in the circuit. Signal Low In a voltage divider, the voltage across one SIMPLE VOLTAGE DIVIDER Vin = R+R of the resistors in a circuit is proportional to Vout R the voltage across the total resistance in the circuit (Figure 7). Figure 7. Voltage Divider When designing a voltage divider, choose two resistors with the proper proportions relative to the full scale of the digital input and the maximum signal voltage. V Board Input Ground

25 The formula for voltage attenuation is: Attenuation = R+R R The variable Attenuation is the proportional difference between the signal voltage max and the full scale of the analog input. = K+K K For example, if the signal varies between and volts, and you wish to measure that with a PCIDIO96H board with a full scale range of to 5 volts, the Attenuation is :, or just. R=(A)*R For a given attenuation, pick a handy resistor and call it R, then use this formula to calculate R. Digital inputs can readily use voltage dividers. For example, if you wish to measure a digital signal that is at volts when off and volts when on, you cannot connect that directly to the board digital inputs. The voltage must be dropped to 5 volts max when on. The Attenuation is :5 or.8. Use the equation above to find an appropriate R if R is K. Remember that a TTL input is 'on' when the input voltage is greater than.5 volts. IMPORTANT NOTE The resistors R and R dissipate power in the divider circuit according to the equation Current (I) = Voltage / Resistance and Power (W) = I x R. The higher the value of the resistance (R + R) the less power dissipated by the divider circuit. Here are two simple rules: For attenuation of 5: or less, no resistor should be < K. For attenuation of greater than 5:, no resistor should be < K.

26 For your notes

27 EC Declaration of Conformity We, Measurement Computing Corporation, declare under sole responsibility that the product: CPCIDIO96H CPCIDIO8H Part Number 96bit I/O Digital I/O board 8bit I/O Digital I/O board Description to which this declaration relates, meets the essential requirements, is in conformity with, and CE marking has been applied according to the relevant EC Directives listed below using the relevant section of the following EC standards and other normative documents: EU EMC Directive 89/6/EEC: Essential requirements relating to electromagnetic compatibility. EU 55 Class B: Limits and methods of measurements of radio interference characteristics of information technology equipment. EN 58: EC generic immunity requirements. IEC 8: Electrostatic discharge requirements for industrial process measurement and control equipment. IEC 8: Radiated electromagnetic field requirements for industrial process measurements and control equipment. IEC 8: Electrically fast transients for industrial process measurement and control equipment. Carl Haapaoja, Director of Quality Assurance

28 Measurement Computing Corporation 6 Commerce Blvd. Middleboro, MA 6 (58) 965 Fax: (58) info@measurementcomputing.com www. measurementcomputing.com