Siemens SITOP PSU8600 - Page 165

Installation
6.8 Connecting battery modules to the UPS module
Power supply system SITOP PSU8600
Manual, 09.2018, A5E36758446-5-76
165
Connecting several BAT8600 battery modules
WARNING
In hazardous zones (ex-applications), is absolutely not permissible that BAT8600 battery
modules are connected in parallel.
In order to extend the power failure buffering time, up to 5 identical SITOP BAT8600 battery
modules can be connected to a UPS module.
Note
When connecting several battery modules in parallel (max. 5), then the following applies:
1.
Ensure that the battery modules have the same charge state
2.
Use identical conductor cross-sections and conductor lengths for the "+" and "-"
connections.
3.
Route the "+" conductor from the UPS module to the
first
battery module - and then loop
further.
Route the "-" conductor from the UPS module to the
last
battery module - and then loop
further.
See the following diagram "Recommended wiring for up to 5 battery modules connected
in parallel".