Specifications

Analog Input Modules
31007715 6/2008 163
Wiring Type
for RTD Sensors
If a channel is configured to support an RTD sensor, you can specify the number of
wires for the device—two, three or four. This parameter is required for RTD sensors;
it is ignored if the channel is not supporting an RTD sensor. By default, the
parameter is set for three-wire devices on both channels. To change the parameter:
Cold Junction
Compensation
for TC Sensors
Cold-junction compensation helps to provide proper temperature measurement for
TC sensors. It is a compensation applied to the junction between the copper
connections on the module and the dissimilar metal in the TC sensor connections.
Cold-junction compensation may be configured as an internal control or externally
using one of several two-wire RTD choices. The parameter is set at the module
level—both channels have the same value, but the value is ignored by any channel
that is not configured to support a TC sensor:
The eight available cold-junction compensation values are:
Step Action Result
1 Double click on the STB ART 0200 module
you want to configure in the island editor.
The selected STB ART 0200 module
opens in the software module editor.
2 Click on the + sign in front of the Wiring type
if RTD parameter.
Channel 1 and Channel 2 are
displayed.
3 In the Value column, select the desired wiring
type from the pull-down menu.
The menu gives you three choices,
two-wire, three-wire and four-wire.
4 Repeat step 3 if you want to configure a wiring
type for the other channel.
Step Action Result
1 Double click on the STB ART 0200 module
you want to configure in the island editor.
The selected STB ART 0200 module
opens in the software module editor.
2In the Value column, select the desired cold-
junction compensation value from the pull-
down menu.
The menu gives you eight choices, as
listed below.
Cold-junction Compensation Device Operating Range
internal determined by the module’s internal sensors
external Pt100 RTD (IEC) degrees C -200 ... +850
degrees F -328 ... +1562
external Pt1000 RTD (IEC) degrees C -200 ... +850
degrees F -328 ... +1562
external Pt100 RTD (US/JIS) degrees C -100 ... +450
degrees F -148 ... +842
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