2 connection diagram, Connection diagram – Thermo Fisher Scientific Alpha DO 2000 User 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