The A-143-2 has 4 independent ADSR envelopes (with 3 time modes), each with gate in, trigger in and it’s own independent output. Each envelope has End Of Attack, End Of Decay and End of Release trigger outputs, which go high when that stage of the envelope is reached. These can be used to daisy chain the envelopes, creating complex envelopes or looping envelopes. All the gate sockets are normalised from top to bottom, so only one gate input is required, although this normalised chain can be broken by using the Gate input of an envelope.
In addition to the obligatory Gate (G) input for envelope generators each sub-module has available a Retrigger (Rt) input. The retrigger turns the direction to "upward" if the envelope has already reached the decay state while the retrigger pulse occurs. If the envelope is still in the attack phase the retrigger input has no action. This is a different behaviour to the A-140 and A-141 ! All Gate inputs are normalled from top to bottom, i.e. the Gate input of the above sub-module is connected to the switching contact of the succeeding module. Thus only one Gate signal need be used to trigger all four sub-modules. But even other types of normalling are possible if desired (e.g. EOD or EOR of the above ADSR to the Gate input of the succeeding sub-module). The envelope outputs are displayed with LEDs.