Instruction manual

CI-ControlWaveLP Installation / 2-23
Figure 2-22 - Isolated HSC (Using SET Input) (Debounce Disabled) Field Wiring
2.4.5 Watchdog Relay/MOSFET Switch Circuitry (see Figs. 2-23 & 2-24)
Figure 2-23 - Watchdog Relay Field Wiring
The Watchdog Relay (K1) or Watchdog MOSFET Switch (Q6) circuits on the Power Supply
Sequencer Board (PSSB) can be used to drive an alarm, annunciation or control device. The
Watchdog Relay or Watchdog MOSFET Switch will be off when the signals Master Clear
(MC) or Watchdog B (WDOGB) are active. The solid state Watchdog Relay circuit (U19)
drives either a Single Pole Double Throw (SPDT) Relay (K1) in conjunction with PSSB
Board Terminal Blocks TB1-3 (WDNC), TB1-1 (WDNO) and TB1-2 (WDCOM) or a
MOSFET Switch (Q6) in conjunction with PSSB Terminal Blocks TB1-1 (WDSWITCHOUT)
and TB1-2 (WDSWITCHIN). The Watchdog circuitry is enabled when PSSB Board Jumper
JP1 is installed in position 1-2 and is disabled when JP1 is installed in position 2-3.