Electrical connection Liquiline CM44P
36 Endress+Hauser
Connecting the supply voltage
1. Route the power supply cable into the housing through the suitable cable entry.
2. Step 2 applies only to the 100 to 230 V AC power unit.
Connect the protective ground of the power unit to the threaded bolt specially
provided on the cable mounting rail.
3. Protective ground or grounding provided by customer (absolutely essential for 24 V
power unit, additionally recommended for 100 to 230 V AC power unit): Provide
a ground cable (min. 0.75 mm
2
(corresponding to 18 AWG))
1
! Guide the ground
cable also through the cable entry and connect it to the threaded bolt on the cable
mounting rail.
4. Connect the cable cores L and N (100 to 230 V AC) or + and ‐ (24 V DC) to the plug-
in terminals on the power unit in accordance with the wiring diagram.
NOTICE
Protective ground/ground cable with end sleeve or open cable lug
The cable can become loose. Loss of the protective function!
‣
To connect the protective ground or ground cable to the threaded bolt, only use a cable
with a closed cable lug as per DIN 46211, 46225, form A.
‣
Never connect the protective ground or ground cable to the threaded bolt with an end
sleeve or an open cable lug!
NOTICE
Incorrect connection and cable run not separate
Interference on signal or display cable, incorrect measured values or failure of display may
occur!
‣
Do not connect the cable shield of the display cable to PE (terminal strip of device)!
‣
Run the signal/display cable in the control cabinet separately from live (current-
carrying) cables.
6.3 Connecting the sensors
6.3.1 Sensor types
Photometer sensors
Sensor types Sensor cable Sensors
Analog photometer sensors without additional internal
power supply
CUK80 • OUSAF12
• OUSAF21
• OUSAF22
• OUSAF44
• OUSAF46
• OUSTF10
• OUSBT66
Fixed cable OUSAF11
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