Liquisys M CCM223/253 Electrical connection
Endress+Hauser 19
5 Electrical connection
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WARNING
Device is live
Incorrect connection may result in injury or death.
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The electrical connection may be performed only by an electrical technician.
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The electrical technician must have read and understood these Operating Instructions
and must follow the instructions contained therein.
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Prior to commencing connection work, ensure that no voltage is present on any cable.
5.1 Wiring
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WARNING
Risk of electric shock!
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At the supply point, the power supply must be isolated from dangerous live cables by
double or reinforced insulation in the case of devices with a 24 V power supply.
NOTICE
The device does not have a power switch
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The customer must provide a protected circuit breaker in the vicinity of the device.
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The circuit breaker must be a switch or power switch, and you must label it as the
circuit breaker for the device.
The electrical connection of the transmitter depends on the sensor:
• If you are using the membrane-covered sensor CCS140 / 141 / 240 / 241 or the open
sensor 963, follow the instructions and illustrations in the "Electrical connection, version
1" section.
• If you are using the total chlorine sensor CCS120, follow the instructions and
illustrations in the "Electrical connection, version 2" section.
5.2 Electrical connection, version 1
The wiring diagram shows the connections of a device equipped with all the options. The
connection of the sensors to the various measuring cables is explained in more detail in
the "Measuring cables and sensor connection" section.
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