Endress+Hauser Liquiline CM444 - Remote Operation via PROFIBUS DP

Liquiline CM442/CM444/CM448 Electrical connection
Endress+Hauser 21
5.1.6 Connecting the supply voltage for the CM444 and the CM448
L+ N- PE
A
B
A0039626
 22 Power supply connection on the BASE2-E
A Internal power supply cable
B Extension power unit
85
85
86
86
SD
Display
Sensor supply
+
+
–
Service
PK
GY
PK
GY
1
2
–
+
–
A
B
41
43
42
Alarm
31
31
32
32
0/4 ... 20 mA
+
+
–
–
HART
+
–
A
B
Sensor 2
Ethernet
87
88
97
98
87
88
97
98
BN
WH
GN
YE
BN
WH
GN
YE
Sensor 1
1
2
L/+
N/–
*
Power
L/+
N/–
PE
Power
(internal)
B
A0039624
 23 Overall wiring diagram for BASE2-E and
extension power unit (B)
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.