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RSFC2-B9FSPS - RS232 to RS485 Asyncronous Converter with Precision Microprocessor Timing


Product Description

RSFC2: RS232 to RS485 Asyncronous Bidirectional Converter with Precision Microprocessor Timing w/ 12V Power Supply & DB9F Adapter w/ 7ft. Cable in Boxed Enclosure

  • This microprocessor controlled auto transmit unit features Bi-directional serial conversion from RS232 to RS485 in 2 wire half-duplex communications mode.

  • User accessable jumpers can set the specific baud rate and character mode of communications. User can also select one of two automatic modes which accomodate a broad range of data rates.

  • Using this jumper defined information, the dedicated microprocessor returns the unit to the receive mode automatically, without any software intervention. The precision of this turn-around eliminates missed bits and data collisions, even from fast responding target devices.

  • Pull-up resistors are built-in to accomodate devices that need inputs: CTS, RTS, and DSR. The RSFC2 does not require these, or any other control signals, to operate at maximum performance.

  • Optimized for non-isolated office/indoor point to point or multi-drop systems.

  • Transparent to all asynchronous data, with any combination of data, parity, and stop bits, at data rates up to 115.2Kbps. 

  • The RS485 driver, is protected by auto-reset fuses, a transient suppressor bridge, and built in ESD tolerance. It is capable of driving 32 standard loads at 4000 ft. and data rates up to 115.2 Kbps.

  • Jumpers allow the RS485 termination, two levels if bias resistors, and the RS232 DTE/DCE mode to be user configured. Jumper J13 will place the unit in Loop-back mode for self test. 

  • Board mounted LEDs display Transmit(TX) and Receive(RX) data activity.

  • A bridge protected switching power regulator accepts supply voltages, from 9 to 35 VDC, or 12-24VAC at 0.5 Watt typical. 

  • Broad environmental range. Temperature: -40C to +85C(-40F to +185F). Humidity: 10 to 90% RH(non-condensing)

  • Four(4) easy mount through hole standoffs, which accept #6 hardware, are provided on the circuit board.

  • User connections are an RJ11/12 telephone style jack for the RS232, a 4 pin Wago style terminal strip and 2 RJ11/12 jacks for the RS485 port, and a 2.1 mm barrel connector and a 4 pin Wago style terminal strip for power.

  • Accessories available are a 12VDC Switching Power Supply(Wall Wart), an enclosure, and a 7ft DB9F to RJ11/12 RS232 cable.

  • Conformal Coating, cable, and connectors, are factory options. Contact us for options help.

  • R E Smith Inc also provides a functionally identical unit with different connectors, LEDs, and a DIN rail mount: RSFC2DIN.

  • R E Smith Inc makes a wide variety of isolated converters that address the electrical noise problems that contribute to unreliable communications, and product failure.  If what you see here is not exactly what you need, don't hesitate in calling us at 513-874-4796.

  • WARNING: Do NOT connect this device to a telephone system under any circumstances. Damage could result to the circuit board and/or your telephone system.

Click here for more information about the RSFC2 RS232 to RS485 Asyncronous Bidirectional Converter with Precision Microprocessor Timing!
Questions? Call 513 874-4796 


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