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How To Remove The Rear Cover And Change The Battery Of The Operator Interface; Changing The Battery Of Control Station Unit - Honeywell 900 User Manual

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How to remove the rear cover and change the battery of the operator interface?

A battery is used to keep time when the unit is without power. Typical accuracy of the Control Station time
keeping is less than one minute per month drift. The battery of an operator interface unit does not affect the
unit's memory, all configurations and data is stored in non-volatile memory.
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Changing the battery of Control Station unit

Step
1
Remove power cabling. Remove the rear cover of the unit. To remove the cover, remove all of
the screws on the rear of the unit that are marked with an arrow but not the one screw marked
with the earth ground symbol. Lift the top side, hinge the cover, thus providing clearance for the
connectors on the bottom side of the PCB.
2
Install in the reverse manner. Remove the old battery* from the holder and replace with the new
battery.
3
Replace the rear cover, cables, and re-apply power.
* Please note that the old battery must be disposed of in a manner that complies with your local waste
regulations. Also, the battery must not be disposed of in fire, or in a manner whereby it may be damaged
and its contents come into contact with human skin.
Revision 9
May 2014
EXPLOSION HAZARD - The area must be known to be non-hazardous
before servicing/ replacing the unit and before installing or removing I/O
wiring and battery.
BATTERIES MUST BE UL RECOGNIZED (UL RECOGNIZED
COMPONENT DIRECTORY CATEGORY BBCV2) LITHIUM BATTERIES
TYPE CR2025 MANUFACTURED BY SANYO ENERGY CORP. OR
VARTA BATTERIE AG OR PANASONIC.
EXPLOSION HAZARD - Do not disconnect equipment unless power has
been disconnected and the area is known to be non-hazardous.
CAUTION: RISK OF ELECTRIC SHOCK
The inverter board, attached to the mounting plate, supplies the high
voltage to operate the backlight. Touching the inverter board may result in
injury to personnel.
CAUTION
:
The circuit board contains static sensitive components. Before handling the
operator interface without the rear cover attached, discharge static charges
from your body by touching a grounded bare metal object. Ideally, handle
the operator interface at a static controlled clean workstation. Also, do not
touch the surface areas of the circuit board. Dirt, oil, or other contaminants
may adversely affect circuit operation.
900 Control Station User Guide
Definition
Action
175

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