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C1.3 Wall-mounted Instrument Connections – Fig. C3
Note. Refer to Fig. 3.1 for Access to Terminals.
Caution. Slacken terminal screws fully before making connections.
1
2
3
4
Turbidity Sensor
7997 100
3 – Red
4 – Green
Blue and
7 –
Black
Braid
Earth Stud
(on case) –
see Fig. 3.1
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.
1
2
3
5 6 7
4
5
6
Serial
1
–
2
–
Rx+
3
–
Rx–
4
–
Tx+
5
–
Tx–
6
–
0V
Fig. C3 Wall Mounted Instrument Connections
1
2
+
–
4
5
Retrans.
Relay 1
Relay 2
Retransmission
Relay 1
Output
Relay 2
1
–
NC
+
Retrans.
2
–
C
Output
3
–
NO
4
–
NC
5
–
C
6
–
NO
=
NC
Normally Closed
C
Common
=
NO
Normally Open
APPENDIX C...
3
N
L
6
Power
Supply
Power
Supply
Mains Supply
Relay 1
N
–
Neutral
L
–
Line
Relay 2
– Earth
Earth Stud (on case)
– see Fig. 3.1
(see Warning below)
43
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