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RS422S : Full-duplex RS232 to RS422 interface converter for 4-wire, full-duplex communications


RS422S with Box

RS422S Label

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  • RS232 to RS422 interface converter for 4-wire, full-duplex communications at distances up to 4000 ft. and data rates up to 115.2Kbps.

General Description:

The RS422S is a fast Async bi-directional RS232 to RS422 interface converter that will operate at data rates up to 115.2Kbps. The unit has jumpers termination, RS232 DTE/DCE selection and, TTL/CMOS operation. The unit has two RJ11/12 connectors an a pin header for power, common TTL/CMOS TX data and RX data.

The RS422S is designed for office and/or indoor applications (non-isolated). A pair of units and a 6-conductor reversing "telephone style" cable can be used to form an RS232 "extension cord" for extended operation beyond the RS232 specification.

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
Converter schematic Rev B

Physical Properties and Features:

RS232: 3-wire interface to RJ11/12 Connector (TX, RX, Common)
RS422: RJ11/12 connector (TX pair, and RX pair)
Power: 2.1mm center positive "Barrel" connector (9VDC)), linear regulator
LEDs None
Bias: Light bias network for Receiver
Termination: 120 Ohm (jumper selectable)
Special: Pin header for TTL/CMOS operation
Protection: None


Distance: RS422 up to 4000 ft. (1250 meters)
Operation: Full-duplex
Format: Asynchronous with any combination of bits, parity and stop
Speed: Up to 115.2Kbps
Temperarure:   0-65C (32-150F) ambient
Humidity: 10-90% non-condensing
Voltage: 8-12VDC or 5VDC
Power: Under 1/2 Watt (typical) + external load
Size: 2.50" X 2.00" X 0.9" (PC Board)
Mounting: 4-Holes 2.00" X 1.50" (built-in standoffs for #6 hardware)

Options and Ordering Information:

RS422S: $39.00 ea. (Circuit board only)
Enclosure: $8.00 ea. (Small)
Cable: $7.50 ea. (RS232, 7 ft., Specify DB9F-7 or DB25F-7)
Supply: $8.50 ea. (12VDC @ 200/300 mA wall power supply)

*RS422S with all options (DB9F cable): RS422S-B9FPS @ $63.00 ea. (Qty. 1-9)

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


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