Thermo Fisher Scientific Alpha COND 200 (In the process of updating the brand guideline & product image) - Manual (Page 8)

4
3.2 Back Panel
The back panel consists of three different connectors that can be used with
removable terminal blocks (included):
12 11 10 9
18 20 19 21
8
17
7
16
6
15
3 5
14
2 4
13
SE
N
SE
PT100 RELAY2
NC NC N L
- 4
- 2
0m
A
+
4
-
2
0m
A
RELAY1
Caution
IN
G
N
D
+
C
O
N
- C
O
N
N
C
N
C
1
1. VAC live wire
2. VAC neutral wire
3. unused
4. unused
5. Relay 2 deactivated position (normally closed)
6. Relay 2 center pole
7. Relay 2 activated position (normally open)
8. Relay 1 deactivated position (normally closed)
9. Relay 1 center pole
10. Relay 1 activated position (normally open)
11. 4-20 mA connection, negative
12. 4-20 mA connection, positive
13.
Pt 100 connection: sense (jumper to terminal 14 if using 2-wire RTD)
14. Pt 100 connection: input
15. Pt 100 connection: ground
16. Conductivity positive terminal
17. Conductivity negative terminal
18. unused
19. unused
20. VAC protective ground wire
21. VAC protective ground wire