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Pair of compact silver boxes with DB9 female and RJ45 ports

UOTEK

UOTEK UT-3212 5-Port RS232 Extender Pair Data Converter

SKU CH-51GH-QM2EK

Extends two RS-232 links up to 1.2 km over twisted pair with surge protection, DB9 female to RJ45, 300-115200 bps, 9-24 VDC, -25 to 70 °C

  • TypeExtender
  • Connector ADB9 FEMALE
  • Connector BRJ45
  • Extends RS-232 links up to 1.2 km using twisted-pair cabling
  • Pair of units enables local and remote serial connections simultaneously
  • Operates reliably from -25 °C to 70 °C in industrial settings
  • Supports asynchronous data rates from 300 to 115200 bps
  • Built-in surge protection shields connected equipment from lightning damage

Industrial RS-232 Extender Pair

This pair of UOTEK UT-3212 units extends the reach of two asynchronous RS-232 links up to 1.2 km over twisted-pair cabling. Each module converts a DB9 female port to an RJ-45 interface, allowing legacy serial equipment to communicate across long cable runs in industrial or commercial installations. The set includes both local and remote modules required for a complete point-to-point link.

Asynchronous Rate and Distance Limits

The extender operates at 300-115200bps in full or half duplex mode, conforming to RS-232C and V.24 asynchronous protocol. Maximum extension distance of 1.2 km is achievable only when a pair of units is deployed together on dedicated twisted-pair lines; a single unit cannot extend the signal. Surge protection is built in to shield connected RS-232 equipment from transient damage.

Power and Temperature Envelope

Each module requires an external 9-24VDC 1A supply, which is not included in the package. The units are rated for continuous operation from -25 to 70 °C with 5-95 % relative humidity, making them suitable for harsh cabinet or outdoor enclosures. Physical dimensions are 79x52x21 mm, allowing dense mounting on DIN rails or panels where space is limited.

Highlights

  • Extends RS-232 links up to 1.2 km using twisted-pair cabling
  • Pair of units enables local and remote serial connections simultaneously
  • Operates reliably from -25 °C to 70 °C in industrial settings
  • Supports asynchronous data rates from 300 to 115200 bps
  • Built-in surge protection shields connected equipment from lightning damage

Specifications

BrandUOTEK
ModelUT-3212
TypeExtender
Connector ADB9 FEMALE
Connector BRJ45

Questions about this item

Should I buy a single UT-3212 or the pair for my RS-232 link?

The product ships as a pair of two UT-3212 units; you need both the local and remote ends to extend an RS-232 connection over twisted pair.

What does the 115200bps rate mean for my serial equipment?

It supports standard asynchronous serial speeds from 300 up to 115200bps, so existing RS-232 devices keep their configured baud rate across the extended link.

How far can the RJ-45 twisted-pair connection actually reach?

The extender pair carries asynchronous RS-232 signals up to 1.2 km over standard twisted-pair cabling between the two DB9 female and RJ-45 ends.

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