Powerware 9315s - Manual (Page 114)

11--6 Powerware 9315 Parallel Capacity/Redundant System with PHP SSBM
164201373 Rev. A 092402
11.7 Common Battery Racks
A Common battery rack can be used to supply the DC input to the Parallel
Capacity/Redundant system UPS modules. This common rack would be used in
place of the individual racks for each module. You can enhance the protection time
provided by your Parallel Capacity/Redundant system by adding one or more
battery racks. The battery racks should be equipped with sealed lead-acid,
maintenance-free batteries. An external battery disconnect switch must be used.
Refer to the applicable Powerware 9315 Installation manual provided with the
UPS for battery requirements and installation instructions.
11.8 External Battery Disconnect for Common Battery Racks
An optional external DC circuit breaker provides a manual means of disconnecting
a battery rack from the UPS modules in the Parallel Capacity/Redundant system.
The circuit breaker is enclosed in a wall-mounted box. You can install it anywhere
between the remote DC supply and the UPS, according to national and local
codes.
The breaker switch should be set to ON for normal UPS operation when DC power
is available at the UPS. When service personnel are performing maintenance on
the UPS or battery cabinet, the switch should be set to OFF.
Note 1: There is no DC disconnect device within the UPMs.
Note 2: The DC input to the UPM is protected by internal fuses F21 and F22.
Note 3: The UPM DC disconnect trip signal from TB4, points 1 and 2 (shunt trip)
or TB4, points 1 and 3 (UV trip) must be connected to the DC source
disconnect device(s). Each UPM must have a separate disconnect
device.
11.8.1 ModBus Cards
The Powerware ModBus Card is an optional X---Slot connectivity device that allows
you to continuously and reliably monitor the UPS system in your Building
Management System (BMS). See Powerware ModBus Card User Guide
164201376, and Powerware Expansion Chassis User Guide, 164201336 for details.