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6.
Input and output signals
6. Input and output signals
6.1 Output signals (DO1...DO12)
DO1, DO2, DO3, DO4: Circuit breakers open/close command
Output signals DO1, DO2, D03, DO4 control the opening and closure of circuit breakers CB1 and CB2
connected to ATS022.
The control logic integrated in the device punctually checks the correct operation of the circuit breakers
following the command.
If the change in status of the circuit breaker is not received within 5 seconds of sending the command,
the device considers the command as failed and operates as below:
• alarm LED lights up.
• DO6 alarm output activation
• DO9 alarm output activation
The alarm relative to the failed operation is recorded in the section concerned of the "Alarms Log".
To reset the alarm press RESET:
the alarm is reset and ATS022 goes into manual mode.
Press RESET again to bring ATS022 to automatic mode.
DO5 Emergency generator start/stop command
Start and stop of the Emergency generator are controlled by means of a bistable relay, making it possible
to maintain the generator start command even when the powersave mode runs out.
• contact DO5 (X23:1 ; X23:2 - NO):
- stop unit = contact open
- start unit = contact closed
• contact DO5 (X23:2 ; X23:3 - NC):
- stop unit = contact closed
- start unit = contact open
DO6 Alarm signal
When an alarm is generated, contact DO6 switches, the switching logic is disabled and the alarm LED
lights up.
To reset the alarm press RESET:
the alarm is reset, the Alarm LED turns Off and the ATS022 enters manual mode.
Press RESET again to bring ATS022 to automatic mode.
DO7 Load protection device
Note : valid for SW≥ 2H
the programmable contact DO7 closes for 1s if both the lines have one or more alarms of the same
type, and is useful for protecting sensitive loads that could be damaged in the event of abnormal power
supplies.
The contact can be programmed with 2 variables:
- Time TL: time that the fault is present on both lines after which the contact is activated.
- Function DO7: the parameter available on ATS022 is a number in decimal format that, if converted
into binary, allows 6 bits to be managed corresponding to the types of alarms (bit set to 0= alarm
deactivated; bit set to 1= alarm activated)
bit
Alarm
0 (least significant)
No voltage and undervoltage
1
Overvoltage
2
Phase missing
3
Unbalance
4
Incorrect phase sequence
5
Invalid frequency
1SDH000760R0002
Installation and operating instructions, ATS022
29
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