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Powerware 9330 (10 kVA--40 kVA) Installation and Operation
164201300 Rev . N 013004
11.5 Optional Industrial Relay Card
An optional Industrial Relay Card (IRC) uses relay contact closures to indicate the
operating status and alarm condition of the UPS system. This interface allows the
monitoring of the operational status of the UPS equipment using the customer’s
monitoring equipment. Normally Open or Normally Closed contacts as needed are
available for connection to the customer’s equipment. Figure 11---2 shows an IRC.
Figure 11---2. Industrial Relay Card
TheIRCcanprovidethesesignals:
• NORMAL MODE Indicates the UPS is energized and suppling power to the
critical load
• BYPASS MODE Thebypasssourceissupplyingthecriticalload. Usuallythis
meansthattheUPSisnotenergized. Theloadisnot
protected in Bypass mode.
• BATTERY MODE The UPS battery backup is supplying the critical load. The
utility power is either interrupted or out of specification.
• ALARM MODE The UPS system is issuing an alarm that affect the current UPS
mode
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