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ABB DO821 3BSE013250R1 100% brand new D0821
A latched output turns on when the counter value and preset value 1 or 2 coincide, or
when the counter value exceeds a ring up-counter maximum value and is reset. A
latched output turns off when a user program turns on the related output relay. A
latched output remains on until it is reset. To clear (turn off) a latched input relay, turn
on the corresponding output relay and confirm that the input relay has been actually
cleared before turning off the output relay. Turning on the output relay for only one
scan may fail to clear the input relay.
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