Thermo Fisher Scientific Alpha DO 2000 - Manual (Page 19)

Instruction manual
Alpha DO 2000
3.2 Connection Diagram
Wall mount version
Connections Description
1. AC mains live wire 14. Hold function
2. AC mains neutral wire 19. 12V output power supply
3. AC mains protective earth wire 20. 12V output ground
4. Alarm relay (NO) 21. Earth ground
5. Alarm relay common 22. DO input, Anode
6. Alarm relay (NC) 23. DO input, Cathode
7. Wash relay 24. Temperature – T2
8. Wash relay 25. Temperature – N.C
9. Relay B (SP 2) 26. Temperature – T1
10. Relay B (SP 2) 28. 4-20 mA temperature output, -ve
11. Relay A (SP 1) 29. 4-20 mA temperature output, +ve
12. Relay A (SP 1) 30. 4-20 mA DO output, -ve
13. Hold function 31. 4-20 mA DO output, +ve
Probe Cable Connections
Cable Connection Controller/Transmitter
Terminal
Colorless/Center (Cathode) K (23)
Brown (Anode) A (22)
Blue (T1) TEMP (26)
Yellow (T2) TEMP (24)
Green/Yellow (Cable Outer Shield) A (22)
Connect jumper wire From E(21) to A (22)
11