9
3
ELECTRICAL CONNECTIONS…
+
–
Normally Closed
Common
Normally Open
Common
Normally Open
Neutral
Live
Earth
TBA
Relay 1
Solenoid Valve
Calibration
Relay
1
2
3
4
5
6
8
9
E
N
L
1
2
3
4
5
6
7
8
10
12
Mains Supply
Retransmission
Output
0V
Rx–
Rx+
Tx–
Tx+
Link
Green
White
–ve (Black)
+ve (Red)
TBB
RS422/RS485
Serial Interface
(if fitted)
D.O. Sensor
1
2
3
4
5
6
7
8
9
E
N
L
1
2
3
4
5
6
7
8
9
10
11
12
Earth Stud
Earth Stud (on case)
Earth Stud (on case)
Pt1000
Temperature
compensator
Braid
Retrans 2
Output (if fitted)
–ve
+ve
4
5
3.4
Panel-mounted Instrument Connections – Fig. 3.6
Note.
Refer to Fig. 3.2 for Access to Terminals.
Caution.
Slacken terminal screws fully before making connections.
Warning.
The power supply earth (ground)
must
be connected to ensure safety to personnel, reduction of the effects of
RFI and correct operation of the power supply interference filter.
Fig. 3.6 Panel-mounted Instrument Connections
