The I-7551 Photo coupler provides a complete full-duplex (including control signal) electrical isolation channel between two RS-232 devices. This isolation is an important consideration if a system uses different power sources, has noisy signals, or must operate at different ground potentials.

The I-7551 has the option of reconfiguring which control signal is used. CTS can be selected instead of DSR and RTS instead of DTR.

The I-7551 incorporates two DC-to-DC converters, the isolation site of I-7551 is located in the input and output interface circuit. The I-7551 is three- way isolation RS-232 to RS-232 converter.

• Input :
  • RS-232 ( TxD, RxD, CTS, RTS, GND or TxD, RxD, DSR, DTR, GND )
• Output:
  • RS-232 ( TxD, RxD, CTS, RTS, GND or TxD, RxD, DSR, DTR, GND )
• Jumpers JP1 and JP2 select the RS-232 input source type
• Communication speed: 115.2K bps (maximum)
• Distance Max: 15 Meters
• Three-way Isolation voltage: 3000 Vdc
• 2500V rms Channel to Channel isolation
• Power consumption: 2.2W (maximum)