Measurement Computing PointScan 100 Series rev.1.0 - Manual (Page 28)

7-2 Analog Input Modules 8-28-01 PointScan/100 User’s Manual
PointScan/104
Instrumentation Analog Input Module
Overview
Eight configurable inputs provide 16 bit high resolution analog measurements. More information can be
found in the on-line help supplied with the IO Toolkit program.
Number of Channels 8 (16 bit resolution)
Input Range 0/4 - 20 mA, 62 mV to 10V, JKERTBCNS thermocouples
Input Impedance (current) 100 ohms Note: input voltage drop = 2 volts at 20 mA
Input Impedance (other ranges) 200K Ohms
Wiring
Two input terminals are provided for each measurement channel. Channel to channel isolation is provided.
4-20 mA Input Jumpers
This module has a 4-20 mA input enable jumper for each channel. Set each jumper to match the desired
input as shown in the diagram below. The jumper setting must match the range selection in the IO Toolkit.
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 shunt that open-circuits as a result of a current overload.
I/O Registers
Function IOtech Registers Modbus Registers
Analog Inputs AX0 – AX7 30001 – 30008