14-6
VersaMax Modules, Power Supplies and Carriers User's Manual
GFK-1504N
14
IC200ALG620
Analog Input, 16 Bit RTD, 4 Channels
Wiring Examples
The following illustration shows connections for 3-wire and 4-wire RTDs.
No loop power is required for this module. The excitation current for the RTDs is
provided by the module, which automatically matches the excitation current to
each configured RTD type.
Required for Calibration if
no RTD is Installed
3-Wire RTD
In (+)
In (-)
Source
4-Wire RTD
Return
In (+)
In (-)
Source
Return
In (+)
In (-)
Source
Return
Cable Shield Connections
If possible, the cable should be grounded at the source device. If that is not
possible, the cable shield must be grounded at the I/O module. This can be
done using an Auxiliary I/O Terminal (IC200TBM001, 002, or 005).
If the module is installed on a Terminal-style I/O Carrier (IC200CHS001, 002, or
005), shield connections can be made on an Auxiliary I/O Terminal that is
attached to the I/O carrier.
If the module is installed on a Compact Terminal-style I/O Carrier
(IC200CHS022, 025), shield connections can be made on an Auxiliary I/O
Terminal that is mounted near the I/O carrier. Be sure to ground the Auxiliary
I/O Terminal Strip if you plan to use it for this purpose.
If the module is installed on a Connector-style I/O Carrier (IC200CHS003), the
cable shield can be connected directly to an Interposing Terminal
(IC200CHS011, 012, 015). Be sure to ground the Interposing Terminal. It is
recommended to use a shielded interposing cable as well between the
Interposing Terminal and the Connector Base. A custom shielded cable can be
made using the Connector kit (IC200ACC304). In addition, a custom shield
braid can be wrapped around standard Interposing Cables (IC200CBL105, 110,
120, 230). If this approach is used be sure to ground the braid.
