3Wn1 And 3Ws1 Circuit-Breakers; Mode Of Operation And Design; General Mode Of Operation; Design Of The Communication-Capable 3Wn1/3Ws1 Profibus System - Siemens 3VF Series Communications Manual

Communication System Manual

3WN1 and 3WS1 circuit-breakers

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4.1 Mode of operation and design

4.1.1 General mode of operation

Fitting circuit-breakers 3WN1 and 3WS1 with a communication-capable overcurrent release version AZN
(type 5) or AZNG (type 8) makes them capable of communicating on PROFIBUS-DP.
The connection of the 3WN1 and 3WS1 circuit-breakers to PROFIBUS-DP is implemented by means of the
DP/3WN1, 3WS1 interface in conjunction with a digital I/O module (e.g. ET 200) which has been
customized to suit the application.
The information available on the overcurrent release is transferred to the bus via the interface module and
the circuit-breaker information via the I/O module. The I/O module can also be used to control the circuit-
breaker.

4.1.2 Design of the communication-capable 3WN1/3WS1 PROFIBUS system

Fig. 12, page 80 illustrates a general system design in which 3WN1/3WS1 circuit-breakers are connected to
PROFIBUS-DP:
Fig. 12: Example design
Note
It is also possible to connect the circuit-breaker to the communication
!
system using only the DP/3WN1, 3WS1 interface module. The following
information can be transferred from the circuit-breaker in this case:
- Highest loaded phase
- All three phase currents
- Rated circuit-breaker current
- Phase imbalance
- Processor fault
- Overload signal
- Temperature alarm
The following additional information can be transferred to and from the
circuit-breaker with the help of ET 200:
- Circuit-breaker state
- ON/OFF commands
- Ready to close
80
PROFIBUS-DP
gateway
DP/3WN1, 3WS1
base
3WN1
3WS1
© Copyright Siemens AG 1998. All rights reserved.
3WN1, 3WS1 Circuit-Breakers
ET 200
dig I/O
parallel
signals
Version 1.0 (08/98)