Liquiline CM442/CM444/CM448 Electrical connection
Endress+Hauser 23
6.2 Connecting the measuring device
The device is live!
Incorrect wiring can result in injury or fatality
‣ Prior to beginning any wiring work, make sure voltage is not applied to any of the cables.
The device does not have a power switch
‣ At the installation location, you must provide a protected circuit breaker in the vicinity of the
device.
‣ The circuit breaker must be a switch or a power-circuit breaker and must be labeled as the
circuit breaker for the device.
‣ At the supply point, the power supply for the 24 V versions must be isolated from dangerous
live cables by double or reinforced insulation.
6.2.1 Opening the housing
Pointed or sharp tools
If unsuitable tools are used, they can scratch the housing or damage the seal, and thus have a
negative impact on the leak-tightness of the housing.
‣ Do not use any sharp or pointed objects, such as a knife, to open the housing.
‣ Only use a suitable Phillips screwdriver.
‣ Release the housing screws step by step. Start with any screw and then release the screw
diagonally opposite etc.
‣ When closing the housing, also tighten the screws step-by-step in a diagonally opposite
sequence.
a0012688
Fig. 24: Releasing housing screws in a diagonally opposite
sequence with Phillips screwdriver
a0012689
Fig. 25: Opening display cover, max. opening angle 180˚
(depends on installation position)
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