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...3 ELECTRICAL CONNECTIONS
3.3 Wall-mounted Instrument Connections – Fig. 3.4 and Table 3.1
Note. Refer to Fig. 3.1 for Access to Terminals.
Caution. Slacken terminal screws fully before making connections.
1
2
3
4
Turbidity Sensors
7997 200 Series,
7997 300
1 – White
2 – Yellow
3 –
Red
4 – Green
5 – Black
6 –
Blue
7 –
Braid
Earth Stud
If 'Test Cleaner' is selected (Set Up Parameters Page), Relay 2 becomes 'Failed Wiper Alarm' relay
(on case)
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.
Mounting
Wall
1
Panel
12
Cleaner initiate
pulse
* Not used on 7997 400
14
1
2
3
5 6 7
4
5
6
Turbidity Sensors
7997 400 Series
1
1 – White
2
2 – Yellow
3 –
Red
3
4 – Green
4
5 –
-
5
6 –
-
6
7 –
Blue
Discard and insulate
unused BLACK wire in
multi-core cable
Fig. 3.4 Wall-mounted Instrument Connections
2
11
+12V
+12V cleaner/
switched
receiver
emitter supply
supply
Table 3.1 4600 Series Transmitter Input Connections
1
+
–
4
Retrans.
Serial
Retransmission
–
Output
–
Rx+
+
Retrans.
–
Rx–
Output
–
Tx+
–
Tx–
–
0V
NC
C
NO
Terminal Number
3
4
10
9
Signal input
2
3
N
L
5
6
Relay 1
Power
Relay 2
Supply
Relay 1
Relay 2
1
–
NC
2
–
C
Relay 1
3
–
NO
4
–
NC
5
–
C
Relay 2
or 'Failed Wiper' on
6
–
NO
200 & 300 Series
=
Normally Closed
Common
=
Normally Open
5
6
8
7
Cleaner *
Detect signal
Power
Supply
Mains Supply
N
–
Neutral
L
–
Line
– Earth
Earth Stud (on case)
– see Fig. 3.1
(see Warning below)
7
6
0V common
* Link
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