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RS232 - 1 x RS485 / RS422, Isolated

  • Model: XS503
  • In Stock


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This is an industrial grade and optically isolated RS232 to RS485 / RS422 converter. The hardened ABS plastic housing with optional built-in DIN mount bracket makes this converter ideal for any industrial and commercial application.

The RS232 interface is fully isolated from the RS485/422 interface by optical isolators. Transient Voltage Suppressors (TVS) effectively isolates and protects your data signals and your equipment from damaging high voltage spikes, surges, ground loops and static electricity for up to 2500Vrms/600W and 15KV EDS protection for each data line. The power supply is galvanic separated from the internal circuitry which gives additional protection.

LED indication lights for Power and the TX / RX signals indicates when data is transmitted or received, which is a great help when troubleshooting a setup.

This RS232 to RS485 / RS422 converter is build around the reliable and high performance SP202E line driver from Exar. Optical isolation is achieved with high speed 6N137 isolation optocouplers from Fairchild Semiconductors.
A 4-feet male/female serial cable is included in the package.

Overall features
  • Industrial grade strength
  • Optically isolated
  • Fail-safe bias resistors
  • Screw terminals for easy connection
  • Automatic Send Data Control
  • Control LEDs for TX, RX and power
  • Compatible with Modbus RTU/ASCII, BACnet
  • Serial RS-232 straight-through cable included (M/F)

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

5V power supply
9V Power supply
Model number XS503
Power 9-30VDC by external supply (not included)
RS232 interface DB9 Female connector. Pin 7 (RTS) and 8 (CTS) are tied together.
Pin 4 (DTR), 6 (DSR), and 1 (CD) are tied together.
RS485 interface Screw terminal header (2-wire Half Duplex)
Fail safe bias resistors Yes
Baud rate 300 - 115.200bps
Compatible with Modbus RTU/ASCII, BACnet
Optical Isolation 2500Vrms / 500VDC isolation
ESD protection 15KV / 600W
Installation method 35mm standard DIN rail or screw mount. Alternatively it can be piggy-backed on top of each other
Operating Temp. -40 to 85C
Comm. distance 3000M (4800bps), 2000M (9600bps)
Dimensions 117mm x 80mm x 25mm
Indication lights Power, Send and Receive
Operating Temp. -13°F to 158°F (-25°C to 70°C)td>
Housing ABS plastic
Compliance CE, FCC, RoHS, ISO 9001
Warranty 1 year Limited Warranty

For alternative RS232 to RS485 / RS422 solutions please see our full selection of serial converters.

Read the Review
Date Added: 11/02/2014 by Michael Kaplan
4 of 5 Stars!4 of 5 Stars!
A good converter at a resonable price. Works well with most of our equipment.

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Date Added: 09/02/2013 by Kate Sandridge
4 of 5 Stars!4 of 5 Stars!
We have been using several of these converters for several months now with our gas monitoring meters...

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Date Added: 08/22/2011 by Jeff Gillian
4 of 5 Stars!4 of 5 Stars!
A good unit worth the money. Would be nice if it had a metal enclosure instead of the hard plastic, ...

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