
CLIF-CBUSLC INTERFACE – INSTALLATION & COMMISSIONING INSTRUCTIONS
EN1Z-1026GE51 R0417
18
C-BUS CONNECTION
The CLIF-CBUSLC features an RS485 interfaces to which C-Bus devices can be connected: RS485-1 (consisting of push-in
terminals 24 [GND-1], 25, and 26).
C-Bus Topologies
Via the C-Bus, up to 30 C-Bus devices (e.g., controllers, etc.) can communicate with one another and a PC central. The C-Bus
must be connected via the individual controllers (open ring).
NOTE:
Star connection is not allowed, as this might cause uncontrollable line reflections.
Instead of CLIF-CBUSLC Interfaces, C-Bus controllers (e.g., the Excel 500, Excel 100, LION, PANTHER) can also be
connected.
CLIF-
CBUSLC
Excel 100
Excel 500
PANTHER
Fig. 21. C-Bus topology Excel 5000
C-Bus Cables
NOTE:
Observe national regulations for C-Bus cables!
For Europe; only shielded cable is permitted.
For the U.S., shielded or unshielded cable can be used.
Cable type
Description
Recommended for
J-Y-(ST)Y 2 x 2 x 0.8
shielded, twisted pair
Europe, inside cabinet
A-Y-(ST)Y 2 x 2 x 0.8
shielded, twisted pair
Europe, outside cabinet
AK 3702
unshielded, twisted pair
US not approved for Europe
AK 3740A
shielded
US (low-cost) not approved for Europe
Belden 9842
twisted pair
Europe, US also possible
Belden 9841
shielded
US
AK 3702
unshielded, twisted pair
US not approved for Europe
AK 3740A
shielded
US (low-cost) not approved for Europe
Table 13. C-Bus cable types