Binary Outputs - ABB AMVAC Installation And Operation Manual

APPENDIX C
E C B
LECTRONIC ONTROL OARD

BINARY OUTPUTS

Binary outputs are pairs of mechanical wipe relay contacts. They can be employed to switch in other circuitry
or to an alarm indicator. See Illustration 3 and 4 for the power limitations of the contacts. Notice the flat curve
for AC voltage in Illustration 4. On the inside of the low voltage cabinet there is a membrane style button plate
that contains a "Ready" LED. The Ready light will either flash or turn off depending on the state of the Capaci-
tor voltage and Coil continuity. The "Unit Ready" output contact can be used to alarm for the more serious of
the three types of problems, but will not signal for all levels of the above problems.
Circuit Breaker Opened (KM1004 Pins 1 and 2)
The Circuit Breaker Opened contacts are normally open. They close only when the circuit breaker is in the
Open position.
Circuit Breaker Closed (KM1004 Pins 3 and 4)
The Circuit Breaker Closed contacts are normally open. They close only when the circuit breaker is in the
Closed position.
Circuit Breaker Auxiliary Open (KM1004 Pins 5 and 6)
The Circuit Breaker Auxiliary Open contacts close whenever the breaker is in the Open position.
Circuit Breaker Auxiliary Closed (KM1004 Pins 7 and 8)
Additional set of normally open contacts close whenever the breaker is in the Close position.
Unit Ready (KM1004 Pins 9 and 10)
These contacts are normally open. They close when the breaker is ready. They are used to monitor capacitor
charge (O-CO operation ready), valid circuit breaker position and coil continuity.
Unit Not Ready (KM1004 Pins 11 and 12)
The Unit Not Ready contacts are normally closed. They open when the Unit is Ready. These contacts are the
inverse (negative) of the Unit Ready contacts.
When using the Not Ready contacts to provide an alarm to SCADA, an 8 second delay is recommended
since the unit will go to Not Ready when the capacitors are below 49 V. The 8 second delay allows the capac-
itors to charge prior to alarming.
Circuit Breaker Remote Open (KM1004 Pins 13 and 14)
The Circuit Breaker Remote Open contacts are referred to as the "Fleeting Output Contacts." This means that
they only close for 100 milliseconds after a Remote Operation or Under Voltage is performed.
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1VAL050601-MB Rev C