Translations:Wiren Board NETMON-1/81/en

Such devices form a signal by closing two wires that are suitable for them. Connect one wire to the "Isolated GND" pin. Connect the second wire to one of the corresponding contacts (discrete input) of connectors I1,I3,i5,i7,I9.

Some counters have a pulse output on the optocoupler, then the two wires have a polarity - "plus" and "minus". In this case, the minus is connected to "Isolated GND", "plus" to "discrete input".