Measurement Computing PointScan 200 Series rev.1.0 - Manual (Page 31)

PointScan/200 User’s Manual 9-25-01 Combination I/O Modules 8-1
Combination I/O Modules 8
Note: It is not necessary to recalibrate analog I/O if a logic module is replaced.
Analog logic modules may be hot swapped and will not require recalibration. User calibration data is stored
in system memory outside of the analog module. Factory calibration data is stored in memory in the plug-in
logic module. Since all logic modules are calibrated to the same factory standards, recalibration is not
necessary if logic modules are moved or replaced.
PointScan/228
Combined Discrete Input and Output Module
Overview
This module combines four discrete inputs and four discrete outputs. An input count feature uses analog
input registers to accumulate the positive transitions of each input. Each of the four outputs may optionally
be configured as Time Proportioned Outputs that pulse ON at a duty cycle proportional to an analog output
register value. More information can be found in the on-line help supplied with the IO Toolkit.
Number of Discrete Inputs 4
Input Voltage Range 10 - 30 VDC/VAC
Number of Discrete Outputs 4
Max. Load per Output 1 Amp
Max. Inrush Current 5 Amps (for 100 mS)
Wiring
A pair of floating terminals is provided for each input to provide channel-to-channel isolation and
a choice of sourcing (power switching), sinking (ground switching) or AC signals on each input. The
outputs all switch power from the DC power input terminal. A ground return for each output
is provided for your convenience.