Liquiline CM44P Electrical connection
Endress+Hauser 37
Sensors with Memosens protocol
Sensor types Sensor cable Sensors
Digital sensors without
additional internal power
supply
With plug-in
connection and
inductive signal
transmission
• pH sensors
• ORP sensors
• Combined sensors
• Oxygen sensors (amperometric and optical)
• Conductivity sensors with conductive measurement
of conductivity
• Chlorine sensors (disinfection)
Fixed cable Conductivity sensors with inductive measurement of
conductivity
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
The following rule applies if connecting CUS71D sensors:
• The maximum number of Memosens inputs is limited to two.
• Any combination of CUS71D or other sensors is possible.
6.3.2 Connecting the functional ground (cabinet device)
You must always connect the terminal strip with PE from the central node in the cabinet.
Use the conductor with cable clamp that is included with the Memosens cable to connect
the functional earth to the terminal strip of the device.
42 Functional earth connection
You must only ever connect one functional earth to each screw in the terminal strip.
Otherwise, shielding is not guaranteed.
6.3.3 Connecting the sensors
Types of connection
• Direct connection of the sensor cable to the terminal connector of the sensor module
PEM and the Memosens module 2DS or of the base module-E (→ 43 ff.)(Memosens
sensors only)
• Optional for Memosens sensors: Sensor cable plug connected to the M12 sensor socket
on the underside of the device (field device)
With this type of connection, the device is already wired at the factory (→ 47).
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