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Burner Control CBR
Profibus interface connection:
CBR burner control units have a bus connection (9 pin SUB-D) integrated into the flange plate.
To complete the connection, a Variosub-D connector (9-pin male) is available (included in orders with
Profibus interface). This connector includes two cable glands with gaskets for cable diameters from 5 to
9mm, terminals for connections, termination device. The termination device can be activated from out
side the plug via an integrated switch. Bus termination between the two conductors A and B is
approximately 220 Ohm. A multi meter should be used to test and confirm this resistance between pins 3
and 8. The bus terminals within the connector are labeled 1A,1B,2A,2B. Make sure the same conductor
colour is maintained throughout devices and that they are connected to the same label throughout.
There is no applicable code pertaining to wiring colours for Profibus. It has become „semi“ standard to
use green for A and red for B. Incoming connections are terminated on 1A, 1B and the outgoing
connections are terminated on 2A, 2B. The shield is to be connected securely by the shield bracket.
(Refer to the installation instructions of the plug manufacturer).
CBR Profibus – Data Cable Connections
1B
2A
2B
8
3
6
5
1
CBR Control box
220
green
green
red
red
shield
shield
Incomming bus cable
Outgoing bus cable to next CBR
1A
5
9
6
1
Sub
-
D 9-pin
Variosub Profibus
-
9
-pin connector
WS T.-
-
Nr. 970-00-440
Note: Bus connector can be removed from the CBR without interrupting the bus.