Electrical connection Liquiline CM442/CM444/CM448
30 Endress+Hauser
6.3 Connecting the sensors
6.3.1 Sensor types with Memosens protocol
The following rule applies if connecting CUS71D sensors:
• CM442
– 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.
• CM444
No restrictions. All the sensor inputs can be used as required.
• CM448
– 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.
6.3.2 Connecting sensors with Memosens protocol
Connection methods
1. Sensor cable directly connected to the terminal connector of the sensor module 2DS or the
L, H or E base module
2. Optional: Sensor cable plug connected to the M12 sensor socket on the underside of the
device. With this type of connection, the device is already wired at the factory.
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
• Amperometric 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-sensitive sensors
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