ABB CL Series Applications Manual page 37

Installation
34
Supplying DC expansion devices
CL-LER.18DC2, CL-LER.20DC2
L01+
L01-
E+ E-
Figure 10: Supply voltage to DC expansion unit
h CL-DC1 and CL-DC2 are protected against reverse
polarity. Ensure the correct polarity of the terminals to
ensure that the logic relay functions correctly.
Cable protection
The logic relay requires cable protection (F1) rated for at
least 1 A (slow).
h
When the CL device is switched on for the first time, its
power supply circuit behaves like a capacitor. Ensure that
reed relay contacts or proximity switches are not used as
the switching device for switching on the power supply.
1SVC 440 795 M0100
F1
R1 ... R12 24V 0V 0V
24 V