Siemens SENTRON 3WA - Page 14

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)