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Small grey metal box with DIN rail clips and terminal blocks, 120 by 80 by 25 mm

UTEK

UTEK UT-509 RS-485/422 Repeater 2 in 1 Accessory

SKU CH-0BA0-ENW8M

Extends RS-485/422 bus distance to 5,000 m and supports 128 devices with 2.5 kV optical isolation

  • Extends RS-485/422 bus distance up to 5000 metres
  • Supports 128 devices on a single network segment
  • 5 kV optical isolation protects against voltage spikes
  • Operates from 9 to 30 V DC external power
  • Wide temperature range -40 to 85 °C for industrial use

Industrial RS-485/422 Repeater

The UTEK UT-509 is a rail-mounted repeater with photoelectric isolation for RS-485 and RS-422 serial buses. It extends communication distance and increases the number of connected devices in industrial automation networks. The unit operates on 9-30V DC power and supports baud rates from 300 bps to 115.2 Kbps. It is designed for harsh environments with an operating range of -40 to 85 degrees Celsius.

Automation Engineers Not Home Users

This repeater suits engineers building factory automation, SCADA, PLC, or building management systems requiring long-distance serial links. It supports up to 128 devices on a single bus with zero-delay auto direction control. Buyers needing USB, Ethernet, or wireless connectivity should look elsewhere as this unit only provides terminal-block RS-485/422 interfaces. It is not a protocol converter for IT networks.

2.5 KV RMS Isolation Voltage

The critical specification is the 2.5 KV rms photoelectric isolation voltage protecting each port from ground loops and surges. Combined with +/-15 KV ESD protection on the interface, it ensures reliable data integrity in electrically noisy industrial settings. The repeater draws 350 mA and mounts on a standard rail within a 120 x 80 x 25 mm housing. Power and traffic indicators provide immediate visual status.

How it compares

Measured against everything we stock in 2-in-1 Device Accessories, at today’s prices. Recalculated every night.

Price $114.99
Pricier than about 77% of the 7,473 comparable items (median $56.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How do I mount the UT-509 on a DIN rail and which step is often missed?

The unit measures 120mm x 80mm x 25mm and clips onto a standard rail; the step often missed is tightening the terminal-block screws on both RS-485/422 sides so the auto-direction circuit can control data flow.

What maintenance will the UT-509 need over time?

No scheduled maintenance is required; the 2.5KV rms photoelectric isolation and +/-15KV ESD protection are solid-state, so only verify the 9-30V DC supply stays within 350mA and that operating temperature remains between -40 and 85°C.

What limit appears first when the UT-509 runs continuously at maximum distance?

At 5,000m the baud rate must stay at 9,600bps; pushing toward 115.2Kbps reduces the reliable range, so the distance-to-speed trade-off is the first constraint under sustained load.

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