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10.7 Terminal connections when 12V DC option is fitted
Terminal No. Connection
Colour
1
ATC Sensor for ppM operation
Red
2
ATC Sensor for ppM operation
Blue
3
No Connection
4
Common
Black
5
DO
2
Sensor Anode
Green
6
DO
2
Sensor Cathode
Yellow
7
+ve of current or voltage output
Customer-defined
8
-ve of current or voltage output
Customer-defined
9
No Connection
10
Normally Closed contact of
(optional) relay output
Customer-defined
11
Common contact of (optional) relay
output
Customer-defined
12
Normally Open contact of
(optional) relay output
Customer-defined
13
No connection for 12V DC version.
14
Negative of 12V DC Input
Customer-defined
15
No connection for 12V DC version.
16
No connection for 12V DC version.
17
No connection for 12V DC version.
18
Positive of 12V DC Input
Customer-defined
∗∗
The ATC connection to terminals 1 & 2 is only for when the unit is reading
ppM (mg/L) units.
DO NOT
connect these for % Saturation readout.
