Emerson Bristol ControlWave LP Manuel d'instructions télécharger pdf (Page 57)

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.

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Emerson Bristol ControlWave LP Manuel d'instructions Page 57