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Small rectangular relay board with long antenna wire

Ruth's sister

Ruth's sister Internal Power Cable 850/900/1800/1900MHz

SKU CH-8HJ7-79SET

Wireless GSM relay switch opens gates via free call on 850, 900, 1800 and 1900 MHz bands

  • Wireless remote control opens gates from a distance
  • Long antenna extends reception range for reliable signals
  • Free-call function lets visitors trigger the opener without a handset
  • Quad-band 850/900/1800/1900 MHz support works across multiple networks

Wireless Relay Control for Gates

This wireless relay switch operates on 850, 900, 1800 and 1900 MHz bands to open gates or doors remotely. It is designed for access-control projects that need a long-antenna receiver and free-call triggering without a separate data plan. The unit suits installers adding wireless entry to existing gate motors or barrier systems.

Simple Two-Wire Connection

Installation requires wiring the relay output to the gate controller’s trigger terminals and powering the module from a suitable DC source. The long antenna must be routed clear of metal enclosures to maintain reliable reception on the stated frequencies. Common issues arise when the antenna is coiled inside a cabinet or when the supply voltage drops under load, causing missed activation signals.

Highlights

  • Wireless remote control opens gates from a distance
  • Long antenna extends reception range for reliable signals
  • Free-call function lets visitors trigger the opener without a handset
  • Quad-band 850/900/1800/1900 MHz support works across multiple networks

Specifications

No published specifications for this item yet.

Questions about this item

How do I confirm the relay is communicating on the 850/900/1800/1900MHz bands after installation?

Trigger a free call to the unit and listen for the relay click; successful activation proves the GSM module is registered and operating on the supported frequencies.

What comes in the box and what must I source separately?

The package includes the relay switch board with long antenna and wireless remote; you must supply a suitable DC power source, wiring to the gate motor, and a working SIM card for the free-call function.

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