CLIF-CBUSLC INTERFACE – INSTALLATION & COMMISSIONING INSTRUCTIONS
19 EN1Z-1026GE51 R0417
Connecting CLIF-CBUSLC via RS485-1 to C-Bus
NOTE: Always power each CLIF-CBUSLC and the connected C-Bus devices via separate transformers.
NOTE: The max. C-Bus cable length is 1200 m (4000 ft).
NOTE: If any devices are not electrically isolated, signal ground connection is recommended. See section "RS485 Standard"
on pg. 11.
NOTE: If the CLIF-CBUSLC is connected at either of the line's two ends, an additional termination resistor (RT = 120 Ohm) is
necessary.
NOTE: Regardless of the position of the CLIF-CBUSLC along the C-Bus, the 3-position switch must be set to MID.
Example: CLIF-CBUSLC and Connected C-Bus Devices
24V~
24~0
F1
230 V
24 V
L
GND-1
GND-1
+5V
ISO
RS485-1 (+) RS485-1 (-)
47 kOHM 47 kOHM
C-BUS
DEVICE #2
RS485 +
RS485 -
GND
C-BUS
DEVICE #3
RS485 +
RS485 -
GND
C-BUS
DEVICE #N-1
RS485 +
RS485 -
GND
C-BUS
DEVICE #N
RS485 +
RS485 -
GND
R
T
CLIF-CBUSLC
= C-BUS DEVICE #1
RS485-1
120 OHM
END
MID
MID
BIAS
24 25 26
1 2
NOTE!
NOTE!
Fig. 22. Connection of a CLIF-CBUSLC via its RS485-1 interface to a C-Bus
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