Endress+Hauser Liquiline CM444 - Page 24

Electrical connection Liquiline CM442/CM444/CM448
24 Endress+Hauser
5.2.2 Sensor types with Memosens protocol for hazardous area
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
Intrinsically safe sensors for use in explosive atmospheres may only be connected to the
sensor communication module type 2DS Ex-i. Only the sensors covered by the certificates
may be connected (see XA).
The sensor connections for non-Ex sensors on the base module are disabled.
5.2.3 Connecting sensors for non-hazardous area
Types of connection
• Direct connection of the sensor cable to the terminal connector of the sensor module 2DS or
of the base module-L, -H or -E (→  25 ff.)
• 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 (→  28).