7.5 Cascade / Modbus
The CS1030 communication module must be used for cabling in a cascade or for integration into a ModBus
system.
In addition, the following wiring diagrams and connection instructions must be observed.
Wiring the cascade
When wiring the cascade, make sure that the terminating resistor is activated for the communication module on
the master boiler and the last slave boiler.
7[
;
&
6
U
H
5[
7
7[
;
&
6
U
H
5[
7
7[
;
&
6
U
H
5[
7
7[
;
&
6
U
H
5[
7
Master
Slave 1
Slave 2
Slave 3
Terminating
resistor
ON
Terminating
resistor
OFF
Terminating
resistor
OFF
Terminating
resistor
ON
7
Electric components and wiring
Cascade / Modbus
138
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