Siemens SENTRON 3WA, System Manual

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System description
2.2 The CubicleBUS² bus system
3WA Air Circuit Breaker Communication
12
System Manual, 11/2021, 92310000004-02
You can find a detailed description of the components including the technical specifications
in the 3WA Equipment Manual; see Chapter Reference documents (Page 5).
Data exchange between CubicleBUS
2
nodes
Data is exchanged internally via CubicleBUS
2
and output at the local interface, I/O modules, or
fieldbus interfaces.
The CubicleBUS
2
is a serial bus and is looped through from one module to the next. The
CubicleBUS
2
must be terminated at the final module with a 120 Ω terminating resistor. Spur
lines are not permitted.
The first CubicleBUS
2
module is connected to secondary disconnect terminals X8-1 to X8-4 of
the circuit breaker.
(1) CubicleBUS
2
modules on the circuit breaker
(2) External CubicleBUS
2
modules
(3) DIN rail
(4) 120
Ω terminating resistor of the CubicleBUS
2
(5) CubicleBUS
2
(6) 3WA air circuit breaker
(7) Guide frame of the 3WA air circuit breaker (optional)