Measurement Computing PointScan 200 Series rev.1.0 - Manual (Page 8)

1-2 General Information 9-25-01 PointScan/200 User’s Manual
I/O Module Components
A PointScan/200 Series I/O module consists of a base assembly and a removable logic module. All base
assemblies have a hinged door that is accessible when the logic module is removed. In 4-20 mA analog
input modules (PointScan/201, /202, /204, and /231) the hinged door provides access to jumpers and/or 100
ohm replaceable shunts.
A logic module may be removed by lightly squeezing the top and bottom locking tabs and pulling the logic
module straight out. To reinstall, insert the logic module into the base and press firmly until it snaps into
place. The logic module is fully seated when the innermost row of ventilation slots are just covered by the
top surface of the base cover.
DC Power Overview
PointScan/200 modules can be powered from the same DC source that is used to power your I/O devices.
No separate power supply is required. Typically, 10 to 30 VDC power is applied to terminals 17 and 18 on
the base of each module. Some PointScan/200 Series modules distribute power or return connections to
I/O terminals for your convenience in making field-wiring connections. Refer to the wiring diagram for
each module for more information.
The PointScan/443 is used to power up to seven PointScan modules of any type, instrumentation loops, and
other devices. It operates on 85-264 VAC (47-63 Hz) or 120-370 VDC and outputs 24 VDC at up to 1 A.
Refer to the figure below for the proper power connections.