Hach POLYMETRON 9125 Operator's Manual page 21

Transmitter 9125 – Conductivity / resistivity measurement
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Fig. 3.3 Power and relays connections
1. Terminal block connections
Analogue outputs
4-20 mA
2. Terminal block connections
"option RS 485"
3. Terminal block connections
of the conductivity sensors
4. Earth
1 2 3
Sensor
4-20 mA
4
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