Measurement Computing PointScan 300 Series rev.1.0 - Manual (Page 30)

6-2 Analog Input Modules 9-12-01 PointScan/300 User’s Manual
PointScan/304
Instrumentation Input Module
This instrumentation analog input module has eight isolated input channels that accept signals from a wide
variety of field devices. Two screw terminals are provided for each input signal. Note: Compatible only
with the Universal Wiring Base.
Thermocouple Burnout Detection
This module has upscale or downscale burnout detection, which is enabled from within the IO Toolkit
program. If the thermocouple resistance exceeds approximately 10 kilohms, the channel reading will be
reported as plus or minus full high temperature or low temperature, depending on whether upscale or
downscale burnout is selected.
Autopolarity Feature (4-20 mA)
If the polarity on a 4-20 mA input is reversed, the value will still be reported properly.
4-20 mA Input Enable 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 Remote IO
Toolkit program.
Note: Access these jumpers by removing the plug-in logic module and opening the access door in the
base.
Analog Input Scaling
Thermocouple inputs are automatically linearized and cold junction compensated. Values are reported as
degrees F, degrees C or 0.1 degrees C. Other types of inputs are reported as unscaled values from
-32768 to 32767. Refer to the IO Toolkit online help system for more information.