... 20mA or 0-20mA current output.Isolated OCT output: for frequency output (0~9999Hz), alarm driver, or totaliser pulse output, ON/OFF control, etc ... .Relay output 1A@125VAC or 2A@30VDC. For ON/OFF ... control, alarm driver, totaliser output, etc.Internal Alarm (Buzzer): user programmable.External Alarm Driver: ...