Optional Industrial Relay Card - Powerware 9330 Installation & Operation Manual

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.
The IRC can provide these signals:
•
NORMAL MODE
•
BYPASS MODE
• BATTERY MODE
• ALARM MODE
Powerware 9330 (IBM 9910 20 kVA) Installation and Operation
164201491 REV. B 013004
Figure 11 ---2. Industrial Relay Card
Indicates the UPS is energized and suppling power to the
critical load
The bypass source is supplying the critical load. Usually this
means that the UPS is not energized. The load is not
protected in Bypass mode.
The UPS battery backup is supplying the critical load. The
utility power is either interrupted or out of specification.
The UPS system is issuing an alarm that affect the current UPS
mode
11--3