Thermo Fisher Scientific Alpha COND 2000 (In the process of updating the brand guideline & product image) User Manual
Page 19
Instruction Manual
αlpha CON 2000
13
Connections for panel mounting version
1.
AC mains live wire
**17. 4 Cell / 2 Cell type Conductivity Input
2.
AC mains neutral wire
18.
4 Cell type Conductivity Input
3.
AC mains protective earth wire
19.
12V Power supply
4.
Relay A (SP 1)
20.
12V ground
5.
Relay A (SP 1)
21.
no connection
6.
Relay B (SP 2)
22.
Earth ground
7.
Relay B (SP 2)
23.
no connection
8.
Wash relay
24.
Temperature ground
9.
Wash relay
25.
Temperature input
10.
Alarm relay (NC)
26.
Temperature sense (short to
11.
Alarm relay common
terminal 25 if using 2- wire RTD)
12.
Alarm relay (NO)
27.
no connection
13. Hold
function
28. 4-20
mA
temperature output, -ve terminal
14. Hold
function
29. 4-20
mA
temperature output, +ve terminal
15.
4 Cell type Conductivity Input
30.
4-20 mA Conductivity output, -ve terminal
**16. 4 Cell / 2 Cell type Conductivity Input 31.
4-20 mA Conductivity 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 (10 & 11).
** When using 2 Cell type Conductivity electrode, terminal 15 should be shorted to
terminal 16 and terminal 18 should be shorted to terminal 17.