Replacing The Lithium Battery On The Syscon Module Introduction; Procedure - Siemens Maxum II Reference Manual

6. Install the I/O boards.
7. Reconnect these cables:
– I/O cables from SIB3 and I/O boards
– Display cables
– Ethernet cable from CAC3
– Internal ethernet cable to SNEs if used
2.3.6

Replacing the Lithium Battery on the SYSCON Module Introduction

Older versions of the SYSCON module are equipped with a lithium battery for on‑board
memory backup. For the original version SYSCON module this is a 3.6 V tube shaped battery.
For the SYSCON2 module it is a 3.0 V flat battery. The latest version does not require a battery.
If a lithium battery is present in your unit, Siemens recommends that the battery be replaced
every 5 years. The battery should only be replaced with an approved spare. Contact Siemens
for a replacement.
NOTICE
Observe battery polarity. Reversing the battery can damage the board.
Before removal of battery, note location of its positive end when installed in battery holder.
The positive and negative terminals are marked on the battery. For the 3.6 V version (original
SYSCON), note that the physical shape of the Positive and Negative terminals on the battery
are NOT STANDARD.
2.3.7

Procedure

Follow this procedure to replace the battery.
1. Power down the analyzer using standard procedures.
2. Open electronic enclosure door (using a 4 mm (5/32 inch) Allen wrench if necessary). When
door is open DO NOT place tension on the Maintenance Panel interface ribbon cable.
3. Using appropriate tools, loosen the topmost SYSCON Assembly fastening hardware that
secures the assembly to electronic enclosure mounting bracket.
4. Pull the SYSCON drawer out and lower it so that it rests in the tilted-out position.
5. The battey holder is located on the left side of the SIB3 board. (Near the back on the original
SYSCON board) Remove battery from its holder.
6. When installing the lithium battery in its holder, place the positive (+) side following the
marking on the holder. Refer to the applicable picture in the previous step.
Note that for the original SYSCON (3.6 V tube shaped battery) the physical shape of the
positive and negative terminals on the battery are NOT like a standard battery.
7. After installation, push the SYSCON assembly back into its mounting facility and secure
assembly in place with the fastening hardware.
Maxum II Reference Manual
Manual, 7/2017, 2000596-001
Electronic Compartment Component Descriptions and Maintenance Procedures
2.3 System Controller Version 2.1 (SYSCON2.1)
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