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Compact grey metal box with DB9 port and terminal block, status LEDs on front

UOTEK

UOTEK UT-503 Industrial RS-232 to RS-485 RS-422 Data Converter

SKU CH-7J0K-BRKZR

Converts RS-232 to RS-422 or RS-485 with 2,500VRMS isolation and 600W surge protection over 5,000m

  • Product typeConverter
  • Industrial signal conversion with RS-232 to RS-485 RS-422 support
  • 2,500VRMS optoelectronic isolation protects equipment from ground loops
  • ±15KV ESD and 600W surge protection on all ports
  • Asynchronous half-duplex or full-duplex operation up to 5,000m
  • Wide -40 to 85°C operating range for harsh environments

Industrial RS-232 to RS-485/422 Converter

The UOTEK UT-503 converts single-ended RS-232 signals to balanced differential RS-422 or RS-485 signals. It features a DB9 female input and a 10-bit terminal block output. Optoelectronic isolation provides 2,500VRMS protection. The unit operates in asynchronous half-duplex or full-duplex modes.

Suits harsh environments needing signal isolation

This converter fits industrial automation systems requiring long-distance serial links over twisted-pair cable. Surge protection of 600W per line guards against lightning strikes. The wide operating range of -40 to 85 degrees Celsius suits outdoor or unheated cabinets. Buyers needing USB or Ethernet interfaces should look elsewhere.

Transmission distance scales with baud rate

At 115.2K bps the maximum reach is 300m, extending to 2.4K m at 38.4K bps and 5,000m at 9,600bps. Select the baud rate that matches your required cable length. The 2,500VRMS isolation voltage is the key specification for protecting connected equipment from ground loops.

How it compares

Measured against everything we stock in Serial & Protocol Converters, at today’s prices. Recalculated every night.

Price $45.99
Pricier than about 73% of the 121 comparable items (median $19.99).

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Specifications

Product
Brand nameUOTEK
Model nameUT-503
Product typeConverter

Questions about this item

How far can the UT-503 reliably transmit data at 115.2K bps?

The converter supports up to 300 metres at 115.2K bps, extending to 2.4 kilometres at 38.4K bps and 5 kilometres at 9,600 bps over twisted-pair or shielded cable.

What are the thermal and power limits when the converter runs continuously in an industrial cabinet?

It operates from -40 to 85 °C with 5–95 % non-condensing humidity, draws power from the RS-232 port, and provides 2,500 V RMS isolation plus 600 W surge protection on every RS-422/485 line.

Which cables and connectors must I already have to connect this converter to my equipment?

You need a DB9 male cable for the RS-232 input and a 10-pin terminal-block cable for the RS-422/485 output; both twisted-pair and shielded cable types are supported.

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