Circuit Board Handling - Siemens 353 User Manual

UM353-1B
O-Ring, Display
Assembly
Display Assembly with
Operator Faceplate
Communications
Port on Underside
Warning Label
Figure 10-1 Siemens 353 Exploded View, Design Level B

10.2.4 Circuit Board Handling

ELECTROSTATIC DISCHARGE, ALL ELECTRONIC ASSEMBLIES
Semiconductor devices must be protected from electrostatic discharge. A properly grounded conductive wrist strap
must be worn whenever a circuit board assembly is handled or touched. A service kit with a wrist strap and static
dissipative work mat is available from mail order and local electronic supply companies.
LITHIUM BATTERY PRECAUTIONS
Each MPU Controller board has a lithium battery that is not field replaceable. Note the following when handling or
disposing of either board.
•
Properly dispose of an un-repairable circuit board with a lithium battery
•
Do not burn the battery
•
Do not place the circuit board on a metal surface or otherwise short circuit battery terminals
•
Do not attempt to charge the battery
•
If electrolyte is exposed, wear safety glasses and rubber gloves when handling the battery
•
For details contact the battery manufacturer
April 2012
Voltage Input, Approvals, and
Warning Label*
Warning and I/O
Capacity Label*
Mounting Clip,
Top and Bottom*
Nameplate*
I/O Expander
Board
Connector Cover*
Ground Screw*
Case with Flange*
Ethernet Connector
MPU Controller Board
Display Assembly Cable
MultiMedia Card Socket
Flip-Down Door with Loop ID Card
Maintenance
Removable
Portions of
Connectors*
Connector Socket
Assembly*
RJ-45 Ethernet Connector*
* = Case Assembly
10-3