Specifications

Control Interface Module (CIM)
This section presents the procedures for removal and installation of
Maxum II door mounted Control Interface Module (CIM). This includes
the CAC3 board, the CIM-Base Board, and the CIM Display. Three
procedures are presented in this section:
Description
• CAC3 Removal and Installation
• CIM-Base Board Removal and Installation
• CIM Display/Touchscreen Removal and Installation
• Battery Replacement
Voltage dangerous to life exists. Before performing the removal and
installation procedures, it is important that primary AC power to the
Maxum II be turned off from the main circuit breaker. Observe all
plant safety requirements before performing any repair or
maintenance on the Maxum II.
WARNING
When the components of the CIM Display are removed from their
mounting location, they must be placed on a clean dirt free work surface.
This is to prevent scratching of panel viewing surface. Interface ribbon
cable must not be bent or crimped when disconnecting from connectors.
CAUTION
The CIM hardware contains intrinsically safe circuits. It is important that
these circuits not be compromised during operation or maintenance.
Black covers used to enclose intrinsically safe circuits must not be
opened. Refer to the Explosion Protection Safety Standards Manual
(A5E02220442001) for more information on Intrinsically Safe Circuits.
CAUTION
The following procedures should be followed for removal and installation
of CIM related hardware.
Procedures
CAC3 Removal and
Installation
Step Procedure
1. Before beginning replacement, if possible, save the current
Maxum .amd database file to be reloaded after the CAC3
board is replaced. Note that if the CAC3 is faulty, backup
may not function. In this case it will be necessary to use the
most recent backup file.
2. Once the database is saved, power off the Maxum.
3. Open electronic enclosure door, using a 4mm (5/32”) Allen
wrench if necessary.
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