... be operated optionally4 gates for each channel, A and B for alarm gates, G for tracing ... A and B gates are alarm gates, G is a tracing gate and W is a self-locking gateAlarm IndicationLED indication for A, B ... each channel. LED indication and audible alarm for A, B, G and W gatesDelay Alarmdivided into two ... c. Signal output interface: synchronous signals, A and B gates alarm signal for 6 channels d. ...