GE P643 User Manual

Figure 13: Power supply terminals
6.4.1 WATCHDOG
The Watchdog contacts are also hosted on the power supply board. The Watchdog facility provides two output
r
elay contacts, one normally open and one normally closed. These are used to indicate the health of the device
and are driven by the main processor board, which continually monitors the hardware and software when the
device is in service.
Chapter 3 - Hardware Design P64x
44 P64x-TM-EN-1.3

GE P643 Specifications

General

Brand	GE
Model	P643
Category	Relays
Language	English