Emerson Process Management Bristol ControlWave ExpressPAC - Manual (Page 74)

ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)
2.
Open the enclosure cover.
3.
Shut down the ControlWave ExpressPAC by disconnecting the
power at the CPU/System Controller assembly terminal TB1
(and if applicable, TB2).
4.
Disconnect all removable card edge connectors from the
CPU/System Controller board and the Process I/O board. Label
or otherwise identify them so you can easily re-connect them
later.
5.
If present, disconnect the display/keypad from connector J2 on
the CPU/System Controller board.
6.
Loosen the upper and lower locking tabs and rotate them so the
boards can be removed together.
7.
Carefully slide the boards toward the front of the unit and
unplug the MVT cable from the CPU/System Controller board
connector P1.
8.
If you need to replace either the CPU/System Controller board
or Process I/O board, you need to separate the two boards. Use a
pair of needle-nosed pliers to squeeze the pair of tabs associated
with each of the six nylon mounting posts, while gently pulling
the CPU/System Controller board away from the Process I/O
board. Carefully unplug the boards from their interface
connectors.
9.
Align the replacement boards with each other and press them
together so that the interface connectors and mounting posts
properly mate; then squeeze together so that the mounting post
tabs capture the CPU/System Controller board.
10.
To install the replacement boards, power must be off. Align the
Process I/O board with the upper and lower guides so that the
CPU/System Controller board is on the right side. Slide the
boards (assembly) into the unit, making sure to re-connect the
MVT cable to connector P1 on the on the CPU/System
Controller board before you fully insert the assembly.
11.
Rotate the upper and lower locking tabs to secure the boards.
12.
Replace all cables removed in steps 2 through 5.
13.
Apply power and test the unit.
5.2.3 Removing/Replacing the Primary Battery System
Note:
This procedure refers to the factory-supplied battery system
(lithium battery/battery pack or lead acid battery) that provides
primary power to the ControlWave ExpressPAC. For information
on replacing the SRAM backup battery, see Section 5.2.4.
5-6 Service & Troubleshooting Revised Mar-2011