Electrical connection Liquiline CM442R/CM444R/CM448R
28 Endress+Hauser
Incorrect connection and cable run not separate
Interference on signal or display cable, incorrect measured values or failure of display may occur
‣ Do not connect the cable shield of the display cable to PE (terminal strip of device)!
‣ Run the signal/display cable in the control cabinet separately from live cables.
6.3 Connecting the sensors
6.3.1 Sensor types with Memosens protocol
The following rule applies if connecting CUS71D sensors:
• CM442R
– Only one CUS71D is possible; an additional sensor is not allowed.
– The second sensor input may also not be used for another type of sensor.
• CM444R
No restrictions. All the sensor inputs can be used as required.
• CM448R
– If a CUS71D is connected, the number of sensor inputs that can be used is limited to a
maximum of 4.
– Of these, all 4 inputs can be used for CUS71D sensors.
– Every combination of CUS71D and other sensors is possible provided that the total number
of connected sensors does not exceed 4.
Sensor types Sensor cable Sensors
Digital sensors without additional
internal power supply
CYK10 with plug connection
and inductive signal
transmission
•pH sensors
•ORP sensors
• Combined sensors
•Oxygen sensors
• Conductive conductivity sensors
• Chlorine sensors
Fixed cable Inductive conductivity sensors
Digital sensors with additional
internal power supply
Fixed cable • Turbidity sensors
• Sensors for interface measurement
• Sensors for measuring the spectral absorption
coefficient (SAC)
• Nitrate sensors
• Optical oxygen sensors
• Ion-selective sensors
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