Patton 222N9 Industrial RS-232 to RS-422 Serial Converter, DB-9 Connector

Patton 222N9 RS-232 to RS-422 Serial Converter, DB-9 Connector
Model: 222N9
Availability: 3 - 4 Weeks or Less
Standard Shipping & Handling

Choose Options

Connectivity Options:

Qty: Add to Cart

Patton 222N9 RS-232 (DB-9) to RS-422 Serial Converter, Interface Powered, Choice of Connector

Patton Electronics’ 222N9 line of serial converters connects computers, PLCs, and sensors employing an RS-232 interface with a DB-9 connector to RS-422 devices. It supports data rates up to 19.2 kbps over two twisted-pair lines. The module takes power for its operation from the data and control voltages on the RS-232 signals - it does not require an external power source. All handshaking lines are looped back on the RS-232 interface.

The 222N9 features bi-directional data conversion at full or half-duplex, supporting distances to 3.5 miles. An external switch selects computer/terminal (DTE) or a modem (DCE) for the serial port, eliminating the need for a crossover cable. The 222N9 is available with a choice of RS-422 connector options: DB-9 male or female, RJ11, RJ45, or direct wire into terminal blocks with strain relief.

The surge-protected models, 222NS9, stand up to transients and directs spikes safely to chassis ground. Compliant with IEC 801.5 level 2, 1kV, the 222NS9 protects connected equipment from lightning strikes and electromagnetic radiation.

Key Features

  • Bi-directionally converts RS-232 signals to balanced RS-422
  • Choice of DB-9, RJ11, and RJ45 connectors
  • Bi-directional data conversion with rates up to 19.2 kbps
  • No power required
  • Handshake signals are looped back onto the RS-232 lines
  • DCE/DTE switch selectable on the RS-232 interface
  • Supports transmit and receive data (X-ON/X-OFF flow control)
  • 0 to 50°C operating temperature
  • 600 watts of surge protection (optional)


222N9F, RS232 to RS422 Converter with DB9F connector, strain relief
222N9FRJ11, Same as above with DB9F to RJ11 connector
222N9FRJ45, Same as above with DB9F to RJ45 connector
222N9M, Same as above with DB9M connector, strain relief
 Same as above with DB9M to RJ11 connector
222N9M-RJ45, Same as above with DB9M to RJ45 connector
222N9SF, Same as above with DB9F connector, surge-protected, strain relief
Same as above with DB9F to RJ11 connector, surge-protected, strain relief
Same as above with DB9F to RJ45 connector, surge-protected, strain relief
 Same as above with DB9F connector, surge-protected 

Total Ports2
TypeSerial Connectivity
Serial Interface
CategorySerial to Serial
Serial Ports1 RS-422/485
Flow ControlX-ON/X-OFF
SignalsCTS turns ON immediately after the terminal raises RTS; DSR and DCD turn ON immediately after the terminal raises DTR
Power ConsumptionApproximately 3 mA
Input VoltageApproximately 3 mA from data lines
Connector TypeDB-9 (RS-232) with choice DB-9, RJ11, RJ45 (RS-422)
EnclosureABS Plastic
Dimensions2.50 x 1.20 x 0.75 (6.4 x 3 x 1.9 cm)
Weight2 oz.
MountingModel 1000R16
Dip SwitchDCE/DTE
Operating Temperature0 to 50°C
Humidity5 to 95% non-condensing
Download NameFile Size
Patton 222N9 User Manual405.62KB