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Green rectangular circuit board with terminal blocks and relay modules

UOTEK

UOTEK UT-5512 8 Channel RS-485 Opto-isolated Relay Data Converter

SKU CH-0C04-B5B7M

Eight-channel relay controller with RS-232 and RS-485 opto-isolated interfaces for industrial I/O automation

  • 8 relay channels controlled via RS-232 or RS-485 interface
  • Opto-isolated communication protects against ground-loop interference
  • Wide DC 9–30 V supply draws only 350 mA
  • Relay contacts switch up to 125 V AC at 500 mA
  • Relay contacts switch up to 30 V DC at 1 A

Eight-channel relay controller

The UOTEK UT-5512 provides eight relay outputs driven through an RS-232 or RS-485 opto-isolated interface. It suits automation engineers and system integrators who need programmatic switching of external devices such as pneumatic valves, stepper motors or instrument signals.

Check power and wiring first

The unit requires a DC 9–30 V supply drawing 350 mA, so verify your source can deliver that range. Confirm whether your host uses RS-232 or RS-485 signalling on the DATA+ and DATA- lines, and plan for the common-ground reference shared across all channels.

Opto-isolation and relay contacts

Opto-electronic isolation separates the communication bus from the relay coils, reducing noise coupling in industrial environments. Each channel offers normally open contacts; channel two adds a normally closed contact, with AC switching rated at 125 V 500 mA and DC at 30 V 1 A. Common terminals are grouped per channel for straightforward loom termination.

Highlights

  • 8 relay channels controlled via RS-232 or RS-485 interface
  • Opto-isolated communication protects against ground-loop interference
  • Wide DC 9–30 V supply draws only 350 mA
  • Relay contacts switch up to 125 V AC at 500 mA
  • Relay contacts switch up to 30 V DC at 1 A

Specifications

No published specifications for this item yet.

Questions about this item

What comes in the box with the UT-5512 and what must I source separately?

The UT-5512 module is supplied. You must provide a DC 9–30 V power source capable of 350 mA, wiring for the RS-232 or RS-485 data lines, and cables for the eight relay channels.

Should I choose the RS-232 or RS-485 interface on the UT-5512?

Use RS-232 for short direct links; use RS-485 for longer runs or multi-drop networks. Both share the DATA+ and DATA- terminals on the UT-5512.

What does the 125 V AC relay rating mean when the UT-5512 is installed?

Each relay contact can switch up to 125 V AC at 500 mA, or 30 V DC at 1 A, within the opto-isolated output channels.

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