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Pin Assignment Chart:
Pin ␣ 1: Shield
Pin ␣ 2: Data output (TxD)
Pin ␣ 3: Data input (RxD)
Pin ␣ 4: Not connected
Pin ␣ 5: Clear to send (CTS)
Pin 6: Internally connected
Pin 7: Internal ground (GND)
Pin 8: Internal ground (GND)
Pin 9: Not connected
Pin 10: Not connected
Pin 11: +12 V
Pin 12: +5 V For remote switch
Pin 13: +5 V
Pin 14: Internal ground (GND)
Pin 15: Universal remote switch
Pin 16: <
Pin 17: =
Pin 18: >
Pin 19: SET
Pin 20: Data terminal ready (DTR)
Pin 21: Not connected
Pin 22: Not connected
Pin 23: Not connected
Pin 24: Not connected
Pin 25: +5 V