Hardware Manual

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Saia-Burgess Controls AG

Monitoring the CPU (watchdog)

CPUs and expansion housings

3

Watchdog    -   connection  diagram

WD 1)

Supply

WD

Start

Bypass

switch for

commissioning

Process

Main switch

+24V

0V

WD^0 1

20 21 22 23 24 25 26

1) Switching capacity of the watchdog contact: 1 A, 48 VAC/DC