The MIC-3761 relay actuator and isolated D/I card is a add-on card for the PCI bus. It provides 8 opto-isolated digital inputs with isolation protection of 3,750 VDC for collecting digital inputs in noisy environments and 8 relay actuators for serving as ON/OFF control devices or small power switches. For easy monitoring, each relay is equipped with one red LED to show its ON/OFF status. The MIC-3761’s eight opticallyisolated digital input channels are ideal for digital input in noisy environments or with floating potentials.