Instruction manual

Connection for panel mounting version

1. AC mains live wire 17. no connection

2. AC mains neutral wire 18. no connection

3. AC mains protective earth wire 19. 12V Power supply

4. Alarm relay (NO) 20. 12V ground

5. Alarm relay common 21. no connection

6. Alarm relay (NC) 22. Earth ground

7. Wash relay 23. no connection

8. Wash relay 24. Temperature ground

9. Relay B (SP 2) 25. Temperature input

10. Relay B (SP 2) 26. Temperature sense (short to terminal 25 if

11. Relay A (SP 1) using 2- wire RTD

12. Relay A (SP 1) 27. PMP, liquid ground in symmetrical mode

13. Hold function 28. 4-20 mA temperature output, -ve terminal

14. Hold function 29 4-20 mA temperature output, +ve terminal

15. no connection 30. 4-20 mA pH output, -ve terminal

16. no connection 31. 4-20 mA pH output, +ve terminal

IMPORTANT: The Alarm relay functions as an “Active Low” device i.e. it switches OFF under

Alarm condition. Therefore the Alarm display device should be connected to the ‘NC’ contacts

of the relay (5 & 6).

NOTE:

Switch or circuit breaker shall included in the building installation.

It shall be in close proximity to the equipment and within easy reach of the

operator.

It shall be marked as the disconnecting device for the equipment.