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ISO232: Opto/Xformer Isolated Async RS232 to RS232 converter with RJ11/12 Connectors


ISO232 with Box

ISO232 Label

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  • Isolated interface converter for RS232 ↔ RS232 (3-wire, full-duplex) point-to-point communications, at distances up to 100 ft. and data rates up to 115.2Kbps. st auto TX-enable RS232 ↔ RS485 interface converter for 2-wire, half-duplex communications, at distances up to 4000 ft. and data rates up to 115.2Kbps.

  • Galvanic (Opto/Xformer) Isolation helps eliminate noise, and protects equipment from destructive transients found in industrial applications.

General Description:

The ISO232 is an Async bi-directional RS232 ↔ RS232 interface converter for isolated 3-wire RS232 applications (full-duplex point-to-point). The unit has RS232 DTE/DCE selection and a TTL/CMOS connector. The unit has 3 LED indicators, RJ11/12 connectors, and an onboard switching regulator. The unit will operate at speeds up to 115.2Kbps.

The ISO232 is designed for office and/or isolated industrial applications, and is used for 3-wire full-duplex, point-to-point applications. The ISO232 can be used in outdoor applications (limited distance); however, many factors can affect reliable operations. Please call for additional information and/or peruse our Fiber Optic product line (compatible with our "copper" converters).

Need something special? Please contact us. We have additional isolated and non-isolated converters, repeaters, and repeater hubs. Units are generally stock to 2-3 business days for shipment. We design and manufacturer our entire product line, and offer technical support for our units, and can offer system recommendations for your application. Please give us a call: 513-874-4796

Related Files:

pdf icon ISO232revD-RW.pdf Converter schematic/physical Rev D

Physical Properties and Features:

RS232 3-wire interface to screw terminal connector (TX, RX, Common)
RS232 (Isolated) 3-wire interface to screw terminal connector (TX, RX, Common)
Power 2.1mm center positive "Barrel" connector (9VDC) and Wago terminals
LEDs Power(YEL), TX-RS232(RED), RX-RS232(GRN)
Bias None
Termination None
Special Switching regulator for 9-35VDC operation, and TTL/CMOS
Protection 3.0KV, 1 sec. Galvanic isolation


Distance RS232 up to 100 ft. (30 meters)
Operation 3-wire, full-duplex RS232 to isolated RS232
Format Asynchronous data with any combination of bits, parity, stop
Speed Up to 115.2Kbps
Temperature 0-65C (32-150F) ambient
Humidity 10-90% non-condensing
Voltage 9-35VDC
Power Under 3/4 Watt (typical) + external load
Size 3.50" X 2.75" X 0.9" (PC Board), with connectors: 3.50" X 3.00"
Mounting 4-Holes 3.00" X 2.25" (built-in standoffs for #6 hardware)

Options and Ordering Information:

ISO232 $99.00 ea. (Circuit board only)
Enclosure $10.00 ea. (Medium)
Cable $7.50 ea. (RS232, 7 ft., specify DB9F-7, DB25F-7, and/or DB9M-7, DB25M-7)
Supply $8.50 ea. (12VDC @ 200/300 mA wall power supply)

*ISO232 with all options (DB9F-7 Cable/DB9M-7 Cable/Enclosure/PS): ISO232-B9FSPS-9M @ $132.50 ea. (Qty. 1-9)

Need a different configuration or more information? Give Ron a Call at 513-874-4796 or 513-638-0228(Cell)

Webstore: ISO232

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