Sintrol S304 - Relay Connections

17
6.4 Relay connections
Light bulb indication is ON when relay contact spring is closed.
Light bulb indication is OFF when relay contact spring is open.
Low alarm level and High alarm level are dust levels where relays change
their state.
Setup configuration 1:
Both relays connected to Normally Open (NO)
Service mode (S305) : Relay 1 contact is open and Relay 2 contact is close.
Relay 2
High alarm level
Relay 1
Low alarm level
Relay 1 (NO)
Relay 2 (NO)
Close
Close
Close
Open
Open
Open
Service mode
Open
Close
Setup configuration 2:
Relay 1 Normally Open (NO), Relay 2 Normally Close (NC),
Service mode (S305) : Relay 1 and Relay 2 contacts are open.
Relay 2
High alarm level
Relay 1
Low alarm level
Relay 1 (NO)
Relay 2 (NC)
Close
Open
Close
Close
Open
Close
Service mode
Open
Open
Dust
concentration
Dust
concentration
Normal
operation
Normal
operation