Remove And Replace The Controller - Allen-Bradley CompactLogix 5480 Installation Instructions Manual

CompactLogix 5480 Controller

Remove and Replace the Controller

1. Turn off power to the MOD power and the SA power RTBs.
IMPORTANT When you remove MOD power from the controller, you shut down
power to all modules in the CompactLogix 5480 system. That is,
all system-side is removed. When you remove SA power from the
controller, all field-side power that is provided by the controller is
removed. If SA power that is provided via a 5069-FPD field
potential distributor, the system does not lose SA power to the
right of the field potential distributor.
In this case, you must use a separate power source for the SA
power RTB on the field potential distributor.
We strongly recommend that before you remove MOD power or
SA power that you take the appropriate actions to help prevent
unintended consequences that can result from a system power
shutdown.
Despite the removal of power from SA RTBs on the controller or
field potential distributor, the 5069-OB16 and 5069-OB16F
modules continue to receive field-side power. The modules
receive power from an external power source that is connected to
the LA (+) and LA (–) module terminals.
2. If there are local Compact 5000 I/O modules in the system,
remove them. If not, skip to
3. Disconnect wires from the RTBs.
For more information, see
on page 16.
18
step 3.
Disconnect Wires from the RTBs
Rockwell Automation Publication 5069-IN019C-EN-P - October 2018
4. Pull the RTB handles to remove the RTBs.
UPS Control RTB
MOD Power RTB
SA Power RTB