2 serial RS232 relay UART protocol DB9 ? ? Dual channel serial relay: Channel: Dual-channel relay, and another two-way IO port expansion, low-level output Interface: DB9 female RS232 level, through the terminal on the computer (serial debugging software) control relay off, self-locking, jogging. Operating voltage: DC 12V power supply (range: 8.5-13.5V) Control voltage: DC 9V 12V or DC 1-48V or AC 85-265V Control current: 10A
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