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Small green circuit board with terminal blocks and rail-mount clips

LORDWORLD

LORDWORLD TTL to RS422 Galvanic Isolated Rail-Mount Converter 3.3V-5V

SKU CH-HH33-ZKNR0

Converts TTL signals to differential RS422 with full galvanic isolation and onboard TVS surge protection for 3.3–5 V systems

  • Full-duplex RS422 link from TTL signals
  • 3 to 5 V logic range with reverse-voltage guard
  • Isolated power rail needs no extra supply
  • Digital isolation blocks noise and spikes
  • Onboard TVS clamps surges and ESD

Galvanic Isolated TTL to RS422 Converter

This rail-mount module converts TTL signals into differential RS422 format for full duplex communication. It operates with 3.3 to 5 V logic levels and includes anti-reverse and over-voltage protection on the power input. Onboard unibody isolation covers both the power supply and digital channels, removing the need for a separate isolated supply. A TVS device suppresses surge and transient spike voltages for electrostatic protection.

Check TTL Voltage and Wiring Before Installing

Verify that the host device drives logic levels within the 3.3 to 5 V range supported by the converter. Confirm the pin-out matches the TTL source and that the differential RS422 lines meet the cabling requirements of the target system. Ensure the rail-mount footprint fits the available DIN rail space in the enclosure. No external isolated power source is required for the isolated terminal side.

Low Power Draw With Onboard Isolation

The unibody power and digital isolation stages operate with low current consumption in normal use. TVS protection clamps transient spikes without adding continuous dissipation. Because the isolated rail generates its own stable voltage, there is no extra heat from an external isolation supply. The module runs silently with no moving parts, making it suitable for enclosed cabinets and noise-sensitive environments.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $35.99
Cheaper than about 62% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameLORDWORLD

Questions about this item

Does the converter ship with any cables or mounting hardware, or do I need to buy them separately?

The unit is a bare rail-mount module; no cables, jumpers or DIN-rail clips are included, so you will need to source wiring and mounting accessories yourself.

Is there a choice of voltage versions or isolation grades, or is the 3.3 V to 5 V range the only option?

The board handles the full 3.3 V to 5 V TTL range in a single design; no alternative voltage models or selectable isolation levels are offered.

What does the 422 rating mean for cable length and noise immunity when the board is installed in a control cabinet?

The RS-422 differential signalling supports long cable runs and strong common-mode rejection, while the onboard TVS and digital isolation further suppress surges and electrostatic spikes in industrial environments.

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