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| PCLD-789D Amplifier and Multiplexer Board Features Multiplexes 16 differential inputs to one A/D input Expands a PC-LabCardTM 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 Introduction PCLD-789D is a front-end signal conditioning and channel multiplexing daughterboard for use with PC-LabCardTM 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-LabCardTM 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. Specifications I/O Cold-junction Compensation Input Channels Input Conditions Gains 1,000 100 10 1 Pin Assignments +24.4 mV/ C, 0 V at 0 C 16 differential CMRR 125 dB 115 dB 105 dB 85 dB Nonlinearity 0.005% FSR 0.005% FSR 0.007% FSR 0.015% FSR Setting Time 75 sec. 15 sec. 15 sec. 15 sec. Input Range 10 V max. depending on the selected gain Output Range 10 V max. Overvoltage Protection 30 V continuous General Certifications Connectors Controller: I/O: Dimensions (L x W) Mounting Power Consumption CE 1 x DB37 male connector 2 x 20-pin box header for daisy chaining Screw terminals 205 x 114 mm (8.1" x 4.5") 4 x screw holes for flat surface mounting +5 V @ 30 mA max, +12 V @ 80 mA max. Ordering Information PCLD-789D PCL-10137-1 PCL-10137-2 PCL-10137-3 PCL-10120-1 PCL-10120-2 Amplifier and Multiplexer Board w/ 1m DB37 Cable DB37 Cable, 1 m DB37 Cable, 2 m DB37 Cable, 3 m 20-pin Flat Cable, 1 m 20-pin Flat Cable, 2 m Block Diagram Signal Conditioning Modules and Terminal Boards |
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