User manual

Signal Conditioning Modules and Terminal Boards
Features
Specifications
I/O
 Cold-junction 24.4 mV/°C, 0 V at 0°C
Compensation
 Input Channels 16 differential
 Input Conditions
Gains CMRR Nonlinearity Setting Time
1,000 125 dB 0.005% FSR 75 µsec.
100 115 dB 0.005% FSR 15 µsec.
10 105 dB 0.007% FSR 15 µsec.
1 85 dB 0.015% FSR 15 µsec.
 Input Range ±10 V max. depending on the selected gain
 Output Range ±10 V max.
 Overvoltage Protection ±30 V continuous
General
 Connectors
Controller: 1 x DB37 male connector
2 x 20-pin box header for daisy chaining
I/O: Screw terminals
 Dimensions (L x W) 205 x 114 mm (8.1" x 4.5")
 Mounting 4 x screw holes for flat surface mounting
 Power Consumption 5 V @ 30 mA max, 12 V @ 80 mA max.
Ordering Information
 PCLD-789D Amplifier and Multiplexer Board w/ 1m DB37 Cable
 PCL-10137-1E DB37 Cable, 1 m
 PCL-10137-2E DB37 Cable, 2 m
 PCL-10137-3E DB37 Cable, 3 m
 PCL-10120-1E 20-pin Flat Cable, 1 m
 PCL-10120-2E 20-pin Flat Cable, 2 m
PCLD-789D Amplifier and Multiplexer Board
 Multiplexes 16 differential inputs to one A/D input
 Expands a PC-LabCard™ product’s analog inputs to 128 channels
 High-grade instrumentation amplifier provides switch selectable gains of 1, 2,
10, 50, 100, 200, 1,000
 Onboard cold-junction compensation circuits for direct thermocouple
measurement
 Built-in signal conditioning functions include filter, attenuator and current
shunt
 Second connectors onboard allow daisy chaining
 Screw-clamp terminal blocks permit easy and reliable connections
Block Diagram
Pin Assignments
Introduction
PCLD-789D is a front-end signal conditioning and channel multiplexing daughterboard for use with PC-LabCard™ product’s analog input ports. It multiplexes 16 differential input
channels into a single A/D converter input channel. You can cascade up to ten PCLD-789Ds, allowing a single data acquisition card to access 160 analog input channels.
PCLD-789D has DB37 and 20-pin flat cable connectors and lets your PCL-818L or PCL-818HD access up to 128 channels without using an additional digital output cable to select
channels. The PCLD-789D uses a high-grade instrumentation amplifier that provides switch-selectable gains of 1, 2, 10, 50, 100, 200 and 1,000. This amplifier lets you accurately
measure low-level signals with your PC-LabCard™ product. The board also contains a cold-junction sensing circuit that allows direct temperature measurement from thermocouple
transducers. A wide variety of thermocouples are supported with software compensation and linearization.
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