Measuring 15 mm wide, Model MAQ20-DIOH provides 4 isolated input channels and 4 isolated output channels. Module can perform two special functions on input channels — Event Counter and Time Between Events. Input channels interface to 90–280 Vac/Vdc signals, and output channels control 24–280 Vac signals at up to 3 Arms continuous. In case of inadvertent wiring errors or equipment fault, each individual channel has continuous overload and reverse connection protection.