Mounting and connecting the device
4.2 Connecting the device
LOGO! CIM
Operating Manual, 10/2021, A5E51250518-AA
29
Note
The external bonding facility should provide effective connection of a conductor with a cross-
sectional area of at least 4 mm
2
.
Note
Terminal blocks do not accommodate more than one individual conductor in a clamping
point.
Requirement
•
You are using the supplied terminal
•
A two-core cable meet the following requirements:
–
a copper (Cu) cable with cross-section of 0.75 mm
2
to 2.5 mm
2
–
rated temperature 75 °C
•
A slotted screwdriver with a 3 mm blade
•
Function earth with minimum cross-section of 2.5 mm
2
copper cable
Screw terminals for the power supply and function earth
1.
Switch off the power supply.
2.
Connect the lines to the connecting terminal with a torque of 0.8 Nm (7lb-in).
①
L+ = live wire, positive pole of the DC voltage 12/24 VDC
②
M = negative pole/ground of the DC voltage 12/24 VDC
③
Functional ground
•
Serves to improve electromagnetic compatibility and to specify a common reference poten-
tial for all signals.
•
Is achieved efficiently by a connection to the DIN rail.
Note
Power supply unit of the CIM is not electrically isolated
No electrical isolation means that the input and output circuits are not galvanically isolated.