Powerware (4080 KVA) 9390 User Manual Page 73

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Features, Options, and Accessories
8-3
Powerware
®
9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev C
8.2.3 HotSync Parallel System
A parallel UPS system with two to four uninterruptible power modules can be installed to
provide a parallel capacity and/or redundant system. This load sharing system provides
more capacity than a single UPS, and can provide backup, depending on the load and
configuration. In addition, when one UPM is taken out of service for maintenance or is n ot
operating properly, a redundant UPM continues to supply uninterrupted power to the
critical load. A parallel HotSync Computer Area Network Bridge X-Slot card provides
connectivity for system metering and operational mode control. The parallel system
consists of two to four UPMs each with a parallel CAN card, and a module tie cabinet or
load distribution panel to act as a tie point. Each UPM requires a separate battery cabinet.
8.2.4 Optional X-Slot Cards
The optional X-Slot cards support several protocols, such as SNMP, HTTP, AS/400
®
,and
Modbus
®
. See Chapter 13, “Communication,” for additional information.
8.2.5 Remote Monitor Panel
An optional RMP contains backlit status indicators and a local horn, allowing you to
monitor the operational status and alarm condition of the UPS from virtually any location
within your facility. This option is described further in Chapter 11, “Using Features and
Options.”
8.2.6 Relay Interface Module
An optional RIM uses relay contact closures to indicate the operating status and alarm
condition of the UPS. This option is described further in Chapter 11, “Using Features and
Options.”
8.2.7 Supervisory Contact Module
An optional SCM establishes an interface between the UPS system equipment and the
customer’s monitor. This option is described further in Chapter 11, “Using Features and
Options.”
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