028-5008-04 LIT-R851B -E04-EN
Sep-19
2
24 VAC POWER & RELAY OUTPUT WIRING
The wiring diagrams are for the R851B-8 models with 8 outputs. The wiring for the R851B-4 is the same except that the unit only
has 4 outputs.
Terminals
Screw terminal & connector #1
Common
Screw terminal & connector #2
24 Vac
Screw terminal & connector #3
Control Signal input
•
It is not necessary to ground any leg of the transformer to earth with the controller card.
•
The controller uses internally a half wave rectifier bridge. On 0 to 10 Vdc control signal, the reference of the control signal is the
Common of the power supply of the SCR controller card.
•
Use a Class 1 ( properly fused ) or Class 2, CSA or UL recognized transformer.
ON
1 2 3
ON
1 2 3 4
4
1
1
2
3
I N P U T
1
1
2
3
I N P U T
