Input Signals - ABB ATS022 Installation And Operating Instructions Manual

6. Input and output signals
6.2

Input signals

DI1, DI2 Status signals of circuit breakers CB1, CB2
Inputs DI1, DI2 must be connected to auxiliary contacts of the status of the circuit breakers of the normal
and emergency lines
• DI1, DI2 open: CB open
• DI1, DI2 closed: CB closed
DI3 Switching Logic Activation/Deactivation
Input DI3 is used for enabling/disabling the switching logic. The function may be used for integrating
generic alarms coming from the plant the presence of which leads to disabling of ATS022 automatic
switching logic.
• DI3 open: logic disabled
• DI3 closed: logic enabled
DI4, DI5 Circuit breakers activation indication
The auxiliary opening contacts of the normal and emergency lines must be connected to contacts DI4,
DI5 for activation of the trip.
• DI4, DI5 open: CB tripped
• DI4, DI5 closed: CB not tripped
In case of trip of a circuit breaker (CB1 or CB2):
• the trip indication contact opens
• the switching logic is disabled
• Alartm contact DO6 is closed
• contact DO12 is closed
• the Alarm LED lights up
• the Auto LED switches Off
To reset the TRIP indication press RESET.
• The TRIP indication is reset
• Alarm LED switches Off
• ATS022 operates in manual mode
• contact DO10 is closed
Press RESET again to bring ATS022 to Automatic mode
• contact DO10 is opened
• the Auto LED lights up
DI6, DI7 Circuit breakers CB1, CB2 removed/inserted position indication
The auxiliary position contacts of the circuit breakers of the normal and emergency lines must be
connected to inputs DI6 and DI7 in removable execution.
• DI6, DI7 open: CB removed
• DI6, DI7 closed: CB inserted
If the circuit breaker is removed:
• the position indication contact opens
• the switching logic is disabled
• Alartm contact DO6 is closed
• contact DO12 is closed
• the Alarm LED lights up
• the Auto LED switches Off
1SDH000760R0002
Installation and operating instructions, ATS022
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