KMtronic USB Relay Controller One Channel BOX
12V 24V 120V 220V One Channel Box RS232 USB Relay Controller Module for PC's USB port using VCP to Control External Device
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Geovision GV-IOBOX-16E Box 16 inputs 16 relay outputs RS485 USB…
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12V 24V 120V 220V One Channel Box RS232 USB Relay Controller Module for PC's USB port using VCP to Control External Device
USB Relay Controller - One Channel - HyperTerminal ASCII commands
