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Amplicon 200 Series Instruction Manual

Analog input expansion panel
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BS EN ISO 9001
Certificate No. FM 15094
Amplicon products are designed and manufactured in the United Kingdom under a
quality system approved by the British Standards Institution
E X 2 0 1
ANALOG
INPUT
EXPANSION
PANEL
This Instruction Manual is supplied with the EX201 Expansion Panel to provide the user with sufficient information
to properly utilise the product as purchased. The information contained has been reviewed and is believed to be
accurate and reliable, however Amplicon Liveline Limited accepts no responsibility for any problems caused by
errors or omissions. Specifications and instructions are subject to change without notice.
EX201 Instruction Manual Part Nº 859 243 74 Issue B2
© Amplicon Liveline Limited
Prepared by C.A. Kenny
Approved for issue by A.S. Gorbold, Operations Director
EX201

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  • Page 1 The information contained has been reviewed and is believed to be accurate and reliable, however Amplicon Liveline Limited accepts no responsibility for any problems caused by errors or omissions. Specifications and instructions are subject to change without notice.

  • Page 2: Table Of Contents

    1.5.2 Data Acquisition Board 1.5.3 EX205 Termination Panel 1.5.4 Interconnection Cables EX201 Expansion Panel - Technical Outline Contacting Amplicon Liveline Limited for Support or Service 1.7.1 Technical Support 1.7.2 Repairs GETTING STARTED Assembling and Mounting the EX201 Expansion Panel 2.1.1 Assembling the Carrier Frame 2.1.2...
  • Page 3 SECTION SUBJECT PAGE MAKING THE CONNECTIONS Positioning the Expansion Panels Panel Interconnect Cables 3.2.1 Control Interconnect Cables 3.2.2 Signal Interconnect Cables 3.2.3 Auxiliary Power Cables 3.2.4 User Manufacture of Interconnect Cables 3.2.5 Screened cables Analog Signal Input Connections 3.3.1 The Terminal Connectors 3.3.2 Typical Input Channel Connections 3.3.3...
  • Page 4 …List of figures continued FIGURE Nº TITLE PAGE CONTROL CONNECTOR PIN-OUTS SIGNAL CONNECTOR PIN-OUTS AUXILIARY POWER CONNECTOR PIN-OUTS OPERATING THE CAGE–CLAMP TERMINAL CONNECTIONS TO A TYPICAL CHANNEL LAYOUT OF USER INPUT/OUTPUT CONNECTIONS UNUSED INPUTS CONNECTIONS TO FULLY FLOATING SOURCES CONNECTIONS TO DIFFERENTIAL SIGNAL SOURCES 3.10 CONNECTIONS TO A SINGLE-ENDED SIGNAL SOURCE 3.11...

  • Page 5: Introduction

    INTRODUCTION General Description The Amplicon 200 Series of Personal Computer based data acquisition products provides very high performance, affordable hardware with user sympathetic software. When a large scale data acquisition system is required, the capacity of the PC mounted hardware can be extended by external expansion panels.

  • Page 6: What The Package Contains

    When removed from the bag, inspect the panel for any obvious signs of damage and notify Amplicon if such damage is apparent. Do not connect a damaged EX201 into circuit. Keep the protective bag for possible future use in transporting the board.

  • Page 7: Host Computer Requirements

    • Microsoft WINDOWS 3 or higher to run DASH200 1.5.2 Data Acquisition Board A data acquisition board must be installed in the host computer. Typical Amplicon boards designed to address the EX201 are: Amplicon PC226 Data Acquisition Board providing - •...

  • Page 8: Ex201 Expansion Panel - Technical Outline

    Up to seven EX201 expansion panels can be connected to a single host board to provide a total capacity of 240 analog input channels. Also available from the Amplicon 200 Series is the EX205 Termination Panel which is concurrently supported to provide complete termination and reference facilities for all analog and digital input/output lines.

  • Page 9: Block Schematic Of Ex201

    CHAN 00 CHAN 01 CHAN 02 CHAN 03 Selected Analog Signal to CHAN 04 Host Data Acquisition System CHAN 05 CHAN 06 Differential Analog 16 Way CHAN 07 Input for Differential Channels 0 to 15 4 Channel CHAN 08 Multiplexer (16 x 3 Terminals) Sub- Channels...

  • Page 10: Contacting Amplicon Liveline Limited For Support Or Service

    The selection process and circuitry is designed to maintain the data acquisition speed of the system. Contacting Amplicon Liveline Limited for Technical Support or Service The EX201 is manufactured by Amplicon Liveline Ltd. Maintenance is available throughout the supported life of the product. 1.7.1...
  • Page 11 Before returning the goods, please request an individual RMA number by contacting Amplicon Customer Services by telephone or fax on the above numbers. Give the reason for the return and, if the goods are still under warranty, the original invoice number and date.

  • Page 12: Getting Started

    SECTION 2 GETTING STARTED The EX201 contains static sensitive devices. Be aware of the caution advised in paragraph 1.3 when unpacking the EX201 board. Assembling and Mounting the EX201 Expansion Panel The EX201 is supplied with a mounting kit comprising the following items: 101.6 mm (4.0") Side Covers 25.4 mm (1.0") Side Covers Carrier Frame...

  • Page 13: Stacking The Panels

    If it is required to mount the board on a panel, the eight insulated, threaded spacers should be fitted to the EX201 printed circuit board in the eight holes provided. It is not essential that the carrier frame is fitted when panel mounting, but is advised for the additional protection it affords. For use in conjunction with an EX205 Termination Panel, see section 3.1, 'Making The Connections' and Section 2.3.3.1, 'Auxiliary Power Supplies - Length of Connection Cables' for...

  • Page 14: Mounting The Board Or Board Stack On A Flat Panel

    (26 way) cable for digital Input/Output is longer as it has to reach the far end of the PC board. These are standard cables available from Amplicon in various lengths and comprise a 40 way (20 twisted pairs) for the signal cable, a 14 way flat ribbon for the control/power cable and a 26 way for digital I/O.

  • Page 15: Signal And Control Cable Connections

    Personal Computer PC226 or PC230 Data Acquisition Board installed in Host PC Analog I/O Signal Cable 40 way (2 x 20 way) Digital I/O Cable Twisted Pairs Ribbon 26 way Flat Ribbon Control Cable EX205 14 way Termination Panel Flat Ribbon ‘Daisy Chain’...

  • Page 16: Setting Up The Ex201

    If the recommended EX205 is also to be connected, a second, short pair of cables is required, and the two expansion panels are interconnected in the chain as shown by the upper two external boards in figure 2.5. The final pair of connectors on the chain of expansion boards provide I/O pin-out to exactly the same configuration as the host data acquisition board.

  • Page 17: Channel Addresses For Quick Start Ex205/Ex201 System

    Channel Address Selected FUNCTION by Host Board Channel Numbers Labelled on Expansion Boards Decimal EX205 (Fixed Level 0) EX201 (Default Level 1) Analog I/P CHAN 00 Analog I/P CHAN 01 Analog I/P CHAN 02 Analog I/P CHAN 03 Analog I/P CHAN 04 Analog I/P CHAN 05 Analog I/P CHAN 06 Analog I/P CHAN 07...

  • Page 18: Sw1 Switch Settings Of The Expansion Level

    Switch Channel Setting Range 32 - 63 64 - 95 96 - 127 128 - 159 160 - 191 192 - 223 224 - 255 FIGURE 2.7 SW1 SWITCH SETTING OF THE EXPANSION LEVEL The analog input channel numbers are related to the expansion levels of the multiplexer according to the table in Figure 2.8.

  • Page 19: On-Board Voltage Reference

    The 32 channels on each EX201 are specified by a channel identifier label, 0 through 31, and to calculate the actual channel number at the selected level, apply the following formulæ for input and reference channels:- Actual Input Channel Number = (32 x Level Number) + Channel Identifier e.g.

  • Page 20: Jumper Settings For Reference Voltage Selection

    J1 - J5 JUMPER SETTINGS Reference Voltage Level Positive Polarity Negative Polarity J1 J2 J3 J4 J5 J1 J2 J3 J4 J5 ±5.000 V J1 J2 J3 J4 J5 J1 J2 J3 J4 J5 ±0.500 V (±500 mV) J1 J2 J3 J4 J5 J1 J2 J3 J4 J5 ±0.050 V (±50.0 mV)

  • Page 21: Calibrating The Reference Voltage

    The voltage reference signal is coupled from its source to the host data acquisition board using a differential wire pair to minimise pick-up and offsets. The dedicated input channel address number for the voltage reference signal from a given EX201 is: Decimal 24 + EX201 Level Number selected on SW1 + EX201 Level Number selected on SW1...

  • Page 22: Auxiliary Power Supplies

    coupled to the host data acquisition board on a dedicated input channel using a differential wire pair to minimise pick-up and offsets. The dedicated input channel address number for the cold junction reference signal from a given EX201 is: Decimal 16 + EX201 Level Number selected on SW1 + EX201 Level Number selected on SW1 The gain setting of this input channel is user programmed to a value for the 'best fit' of the...

  • Page 23: Interconnection Cable Lengths

    5 V at 1.5 A OR 5 V at 1 A plus isolated ±15 V at 300 mA each output. Suitable encapsulated linear power modules from the Amplicon 300 Series are:- Output...

  • Page 24: Configuration Of The Ex201 For Auxiliary Power

    2.3.4.2 Configuration of the EX201 for Auxiliary Power Auxiliary Power Supplies - Jumper Configuration EX201/5 Power Source Jumper J6 to J9 PL5/6 Auxiliary Power Settings Connector Usage +5 V ±15 V On-board Host PC via DC to DC Not Used Control Cable Converter (Factory default setting)

  • Page 25: Analog Input Signal Conditioning

    For information on connecting the auxiliary power supplies to PL5/6 see section 3, 'Making the Connections'. 2.3.5 Analog Input Signal Conditioning The analog input signal on each channel of the EX201 may be 'conditioned' before it reaches the active multiplexer circuitry. Signal conditioning ensures that the incoming signal is made compatible with the characteristics of the data acquisition system, and is performed on the EX201 by individual channel plug-in modules which can be standard items or custom designed.

  • Page 26: Making The Connections

    SECTION 3 MAKING THE CONNECTIONS The EX201 Expansion Panel can form part of a multi-channel system and a number of connections must be made for the system to function properly. Connections from panel to panel and to the host board are made by multi-way ribbon interconnect cables and user connections are by single wires to individual terminals.

  • Page 27: Control Connector Pin-Outs

    optional use. The remaining control and power lines on pins 9, 11, 12, 13 and 14 are terminated for user connection by the EX205. Address Address > Address Address 14 WAY RIBBON CABLE Address 16 Address 32 CONTROL AND POWER Address 64 Address 128 INTERCONNECTIONS...

  • Page 28: Auxiliary Power Cables

    The design of the 200 Series has set out to reduce such effects to a minimum and to provide the tools for connecting signals from a variety of sources. Features of the system designed to help in...

  • Page 29: The Terminal Connectors

    • True Differential Operation Differential operation allows the measurement of a signal at its source without interference from voltages existing between the grounds of the sending and receiving devices. The balanced operation of the differential circuit means that interfering signals induced in the signal wiring cancel out leaving the desired signal clean.

  • Page 30: Typical Input Channel Connections

    Small Screwdriver Prepared Signal Wire FIGURE 3.4 OPERATING THE CAGE–CLAMP TERMINAL 3.3.2 Typical Input Channel Connections Each of the thirty two analog input channels on an EX201 is equipped with a three terminal connector group. Figure 3.5 illustrates a typical group. The three terminals are labelled '+', '–' and 'AGND' and the functions are: is the positive or high input.

  • Page 31: Important Notes - Please Read Before Making Connections

    Channel 0 to 3 CON1 Channel 4 to 7 CON2 Channel 8 to 11 CON3 Channel 12 to 15 CON4 Channel 16 to 19 CON5 Channel 20 to 23 CON6 Channel 24 to 27 CON7 Channel 28 to 31 CON8 ANALOG INPUT CHANNELS 0 to 15 CHAN 00 CHAN 07...

  • Page 32: Signal Sources And Their Methods Of Connection

    Measure the common mode voltage. e.g. the potential difference between the ground point of the signal source and the ground of the host PC. This common mode voltage could be AC or DC or a combination. Using an isolated voltmeter, connect one probe to the ground of the signal source and the other to the ground of the PC.

  • Page 33: Fully Floating Differential Source

    3.3.4.2 Fully Floating Differential Source If the signal source does not have an electrical connection to ground it is fully floating. Typical fully floating sources are ungrounded thermocouples, batteries or some battery powered instruments, isolated 4 - 20 mA transmitters. Methods of connecting to fully floating sources are shown in figure 3.8.

  • Page 34: Single-Ended Signal Source

    Differential source. Differential High Unshielded wire pair Signal for connection. Source AGND Measure these voltages and ensure that 10 V peak is not exceeded Differential source. Differential High Shielded wire pair Signal for connection. Source AGND Do not connect to ground at source FIGURE 3.9 CONNECTIONS TO DIFFERENTIAL SIGNAL SOURCES...

  • Page 35: Multiple Single-Ended Signal Source

    3.3.4.5 Multiple Single-ended Signal Source A single piece of equipment under test may well produce several signals, all referred to its common ground. Connect the analog inputs as shown in figure 3.11, ensuring again that AGND is not connected. High 1 Multiple single-ended AGND Multiple...

  • Page 36: Analog Input Signal Conditioning

    EX201 provides means to equip each channel with a pluggable module designed for the specific requirement. A range of standard signal conditioning modules are available from Amplicon and these are described in paragraphs 4.1.2 to 4.1.4. Blank headers are also available for the user to construct modules as required for specific applications.

  • Page 37: Thermocouple Input Module

    Pin 1 of the header is indicated by a chamfer at one corner. The pin 1 end of the board mounted socket is indicated by an indent at the outer edge of the socket. Signal Conditioning Sockets for Header Header Module Modules (Shown fully loaded) SK 0 to SK15...

  • Page 38: Ma Current Input Module

    Open Circuit Detection The 10 M Ω resistors have minimal effect on the thermocouple reading in normal use. However, should the thermocouple burn out or otherwise go open circuit, then the input voltage rises to cause the analog to digital converter to go over full scale in a negative direction and so set the overrange flag to indicate an open circuit fault.

  • Page 39: Multiplexer Protection Module

    For specialised applications the user can construct input signal conditioning modules designed for a particular purpose. Blank headers (Amplicon part number 919 254 70) are available for this purpose, and the design can be passive or use active circuits powered by the ±15 V isolated rails.
  • Page 40 Resistors R4 and R5 are a balanced pair of precision resistors which form part of filter, attenuator and protection circuits. When R4 and R5 are installed in any header module, the associated drill points must be drilled out to open the series circuits. Resistor Rx when fitted provides an attenuator comprising R4, R5 and Rx.

  • Page 41: Typical Examples Of Customised Signal Conditioning Modules

    4.2.1 Typical Examples of Customised Signal Conditioning Modules. The following circuits provide examples of custom modules that the user may construct for a specific application. EX201 Page 37...

  • Page 42: Differential Voltage Input With Ground Reference Resistor

    4.2.1.1 Differential Voltage Input with Ground Reference Resistor Figure 4.6 below shows a simple circuit and header layout for fitting a ground reference resistor to any channel that has a fully floating input source. The drill points must not be opened for this application.

  • Page 43: Differential Voltage Or Current Input With Common Mode Attenuator

    4.2.1.3 Differential Voltage Input with Normal (Series) Mode Attenuation Figure 4.8 shows the circuit and header layout for fitting a normal mode attenuator to any channel. R4 and R5 must be precision resistors of equal value and Rx for the required attenuation factor (A) is Rx = 2 * R4 / ( A –...

  • Page 44: User's Notes

    4.2.1.4 Differential Voltage or Current Input with Common Mode Attenuation DPxA (Opened) Analog Input Signal Terminals Multiplexer Input AGND DPxB (Opened) AGND FIGURE 4.10 COMMON MODE ATTENUATOR - VOLTAGE INPUT To measure signals in the presence of high common mode voltages, balanced attenuators to ground are required.

  • Page 45: Technical Specifications

    APPENDICES APPENDIX A TECHNICAL SPECIFICATIONS Except where otherwise stated, all figures quoted in the specifications are typical at 25°C. Hardware Specification FUNCTION 32 channel expansion multiplexer and reference module for use with PC226 and PC230. Compatible with EX205 Termination Panel. ANALOG INPUT Number of Channels Each EX201 Expansion Panel is equipped with:-...
  • Page 46 Input protection fitted 8 µs to 99.9% FSD Maximum common mode voltage ±10 V peak. Common Mode Performance By employing a special configuration of the input option module, common mode voltages up to ±200 V peak can be accommodated, with normal mode signal attenuation. Each analog input channel equipped with optional input signal Signal Conditioning conditioning facilities.

  • Page 47: Power Requirements

    Stability ±0.025% Temperature coefficient 0.01 % / ° C CONNECTORS The EX201 will 'daisy chain' with further EX201 expansion Panel Interconnects panels and an EX205 termination panel to the host PC230/226 via: Two parallel 40 way IDC for analog I/O Two parallel 14 way IDC for address, control, power.
  • Page 48 Dissipation Each EX201 (without custom headers) will dissipate typically 0.75 Watts of heat Mounting Rails Carrier rails DIN/ES TS 32 or TS 35 Wiring Access Side clearance of 100 mm on both sides should be allowed for proper dressing of the incoming signal cables Positioning The EX201 will normally be connected to the host computer by cables of length 1.0 m or 2.0 m.
  • Page 49 APPENDIX B ANALOG CHANNELS GAIN SETTINGS AND ADDRESS LIST The tables below and overleaf provide: Gain and analog input voltage ranges for the PC226/230 The complete list of analog input and reference channels for a fully expanded Data Acquisition System. ADC CONTROL WORD INPUT VOLTAGE NOMINAL...
  • Page 50 EX205 LEVEL 0 EX201 LEVEL 2 EX201 LEVEL 4 EX201 LEVEL 6 CHANNEL Nº CHAN CHANNEL Nº CHAN CHANNEL Nº CHAN CHANNEL Nº CHAN EX201 LEVEL 1 EX201 LEVEL 3 EX201 LEVEL 5 EX201 LEVEL 7 Page vi EX201 APPENDIX...

  • Page 51: Glossary Of Terms

    APPENDIX C GLOSSARY OF TERMS The following glossary explains some terms used in this manual and in data acquisition applications. Active Filter: An electronic filter that combines active circuit devices with passive circuit elements such as resistors and capacitors. Active filters typically have characteristics that closely match ideal filters. ADC (A/D): Analog to Digital Converter.
  • Page 52 Cold Junction Compensation (CJC): A technique to compensate for thermocouple measurement offset when the reference or cold junction is at a temperature other than 0° C. Common Mode Rejection Ratio (CMR): A measure of the equipment's ability to reject common mode interference.
  • Page 53 Input/Output (I/O): The process of transferring data from or to a computer system including communication channels, operator interface devices or data acquisition and control channels. A shared boundary defined by common physical interconnection characteristics, signal Interface: characteristics and meanings of interchanged signals. Interrupt: A computer signal indicating that the CPU should suspend its current task to service a designated activity.
  • Page 54 Spike: A transient disturbance of an electrical circuit. Stability: The ability of an instrument or sensor to maintain a consistent output when a consistent input is applied. Successive Approximation: An analog to digital conversion method that sequentially compares a series of binary weighted values with the analog input signal to produce an output digital word in ‘n’...
  • Page 55 APPENDIX D CIRCUIT SCHEMATICS AND ASSEMBLY DRAWINGS Full circuit diagrams and layout drawing of the EX201 Expansion Panel are given in this appendix. Drawing number B924372 sheet 1 EX201 Schematic. Component Reference Function Channels 0 - 3 Differential Input multiplexer Channels 4 - 7 Differential Input multiplexer Channels 8 - 11 Differential Input multiplexer Channels 12 - 15 Differential Input multiplexer...
  • Page 56 EX201 Appendix...
  • Page 57 EX201 Appendix...
  • Page 58 EX201 Appendix...
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