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USB 4 channels relay output / photo isolator input board provides photo couple digital input and relay output channels. The photo isolator input part provides 4 photo couple digital input channels, which allow the input signals to be completely floated and prevent the ground loop. The relay output part provides 4 relays to drive 4 different output channels. Each relay channel can be used to control ON/ OFF of external devices, to drive external power relays, to activate alarms… etc.
The USB 4 channels relay output / photo isolator input board provides Plug and Play (PnP) features, it is a programmable I/O interface board for PC/486, Pentium, or compatibles. The on board high speed 8051 uC provides USB functions run at 12Mbps full speed or 1.5Mbps low speed.