Measurement Computing PointScan 200 Series rev.1.0 - Manual (Page 26)

6-2 Analog Output Modules 9-25-01 PointScan/200 Users Manual
PointScan/202
High Density 4-20 mA Analog Input Module
Overview
Sixteen 4-20 mA inputs provide 16 bit high resolution analog measurements. More information can be
found in the on-line help supplied with the IO Toolkit.
Number of Channels 16 (16 bit resolution)
Input Range 4 - 20 mA
Input Impedance 100 ohms Note: input voltage drop = 2 volts at 20 mA
Wiring
A single input terminal is provided for each measurement channel. Care must be taken to externally provide
a suitable instrumentation ground for these single ended input circuits.
Current Shunts
Precision 100 ohm current shunts, beneath the hinged access door in the wiring base, pass current and
maintain loop integrity even if the module is unplugged. A spare shunt is provided and may be simply
inserted in place of any socketed shunt that open circuits as a result of a current overload.
I/O Registers
Function IOtech Registers Modbus Registers
Analog Inputs AX0 - AX15 30001 - 30016 Bipolar values: -32768
Æ 32767