Rockwell Automation 61C615 RTD Termination Panel - Manual (Page 11)

3Ć1
3.0 INSTALLATION
This section describes how to install and remove the termination
panel and its cable assembly.
3.1 Wiring
The installation of wiring should conform to all applicable codes.
To reduce the possibility of electrical noise interfering with the proper
operation of the control system, exercise care when installing the
wiring from the system to the externaldevices. For detailed
recommendations refer to IEEE 518.
3.2 Initial Installation
WARNING
THERE IS NO ISOLATION BETWEEN THE INDIVIDUAL CHANNELS ON THE
TERMINATION PANEL. DO NOT CONNECT DIFFERENT CHANNELS ON THE
SAME TERMINATION PANEL TO COMMON POINTS OF DIFFERENT
POTENTIALS. (FOR EXAMPLE, THIS PANEL SHOULD NOT BE CONNECTED TO
RTD DEVICES USED TO MONITOR MOTOR TEMPERATURES BECAUSE THE RTD
DEVICES WILL FLUCTUATE IN COMMON MODE VOLTAGE LEVEL BETWEEN THE
DIFFERENT MOTORS.) FAILURE TO OBSERVE THIS PRECAUTION MAY
DESTROY THE TERMINATION PANEL DUE TO EXCESSIVE CURRENTS FLOWING
IN THE COMMON WIRING.
Use the following procedure to install the module:
Step 1.
Turn off power to the system. All power to the rack as well
as all power to the wiring leading to the termination panel
should be off.
Step 2. Mount the termination panel. It should be mounted to
permit easy access to the screw terminals on the terminal
board. Make certain that the terminalboard is close
enough to the rack so that the cable will reach between
the terminalboard and the module. The panelshould be
located so that the flat cables can be routed to the front of
the module without coming in contact with high voltage
wires.
Step 3. Mount the external power supply. It must be located within
a 6Ćft cable run of the termination panel. It should be
located so that the power cable can be routed to the
termination panelwithout coming in contact with high
voltage wires.
Step 4. Connect the power cable on the termination panel to the
power supply.
Step 5. Fasten field wires to the terminal strip. Make certain that all
field wires are securely fastened. The shield should be
terminated at the panel. Do not connect the shield at both
ends of the cable. Typical field signal connections are
shown in figure 3.1.