Connecting The Cs Interface - Landis+Gyr E65C Series User Manual

Installation/De-installation
4.4.4

Connecting the CS interface

D000043188 en d – E65C – CU-P40, P41, P42 – User Manual
Connect the CS interface of communication unit CU-P41 or CU-P42
according to the connection diagram as follows:
1. Shorten the connecting wires to the required length and strip them for
approx. 4 mm (wires and strands up to 2.5 mm
2. If stranded wire is used as phase connection line, it has to be provided
with ferrules for connection.
3. Connect the connecting wires to the screwless spring-loaded terminals
(the terminals are numbered as shown on the connection diagram):
– Insert a size 1 screwdriver in the upper opening and insert it turning
slightly upwards (Fig. 4.9 A).
– Now place the stripped connecting wire in the lower opening and
hold it there securely (Fig. 4.9 B).
– Withdraw the screwdriver. The connecting wire is then firmly fixed
(Fig. 4.9 C).
A
Fig. 4.9 Connection in screwless spring-loaded terminals
Bare end of connecting wire must not be too long
The insulation of the connecting wire must extend as far as the terminal
indentation, i.e. there must be no further bare part of the connecting wire
visible above the terminal edge (as shown in Fig. 4.9 C). Touching live
parts is dangerous to life. The stripped part of the connecting wire should
be shortened if necessary.
Only one wire or ferrule per terminal
Only one wire or ferrule with strand(s) may be connected in screwless
spring-loaded terminals. The terminal could be damaged or the contact
could not be properly made.
If a connecting wire must be disconnected again for any reason, this is
performed in the reverse sequence:
A
Fig. 4.10 Releasing connection from spring-loaded terminal
B
B
25/40
2
can be connected).
C
C
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