Rockwell Automation T743x-xx ICS Regent+Plus RTD Input Equipment - Manual (Page 16)

RTD Input Equipment (T7432)
1 6
Industrial Control Services
1. For unused input channels, short the +SENSE, -SENSE,
and -FORCE terminals together. This will eliminate any
floating readings for the unused channels.
2. Minimize the resistance of the RTD extension wire by
using heavier wire gauges. The RTD input circuit supports
a maximum 20 Ohms lead resistance.
Radiated Field Susceptibility
Transmitting equipment should not be operated within the
vicinity of the termination panel. Power levels greater than
one watt at a distance of one foot may degrade RTD
measurements and eventually cause a permanent fault to be
logged, resulting in a shutdown (clear to 0) of all inputs on the
affected panel.
Grounding
The termination panel should be connected to the system’s
safety or system ground. Use a minimum of #18 stranded
wire. A chassis ground terminal is provided for this purpose.
It is located at the bottom right corner of the termination
panel, near RTD input 16.
Additional ground terminals are provided with each RTD
terminal block group. These terminals are electrically
connected to the chassis and can be used for RTD field cable
shield terminations.
Installing the Termination Panel
The RTD termination panel can be mounted in a 19-inch rack
or flush mounted to a panel. Refer to Figure 14 for overall
mounting dimensions for the termination panel and Mux.