ABB REC 561 User Manual page 388

ABB Network Partner AB
Version 1.0-00
Interlocking
The interlocking module is connected to the surrounding functions within
a bay as shown in Fig. 1.
Interlocking
modules in
other bays
Interlocking
module
Fig. 1 Interlocking module on bay level
The communication between different bays is performed via the station
bus and can consist of signals of these types:
• Unearthed busbars
• The busbars are connected together
• Other bays connected to a busbar
• Received data from other bays are valid
Fig. 2 shows the principle of data exchange.
Bay 1
Disc Q and Q closed
A B
A not earthed
B not earthed
A and B interconnected
A
B
Q
Q
A
B
Q
0
Q
L
Fig. 2 Data exchange between interlocking modules
The interlocking function in a bay that uses invalid data as conditions
does not give a release for command. Invalid data of positions of HV
apparatuses can be obtained, for example, at intermediate positions, loss
of a control terminal, or at input board error.
Control module
Control module
Control module
Station bus
Bay n Bus coupler
Disc Q and Q closed
A B
A not earthed
B not earthed
A and B interconnected A and B interconn in other bay
Q
Q
Q
A
A
B
Q
Q
0
Q
L
1MRK 580 151-XEN
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(X80151-1)
A unearthed
B unearthed
A and B interconnected
Q Q Q
B
AE BE
0
(X80151-2)