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AJAX | Relay Jeweller Wireless Dry Contact Relay, 13 A at 110-230 V | 42837

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SKU:
AJ-42837

A wireless dry contact relay that switches up to 13 A at 110-230 V AC, or 5 A at 24 V DC, controlled from the Ajax app or by an automation scenario. It is how an Ajax system operates something that is not an Ajax device.

Built for the installer

Because the contact is dry and independent of the load, it drives gates, lighting circuits, heating, door strikes and signalling inputs on third-party equipment. Pulse mode with a duration from 0.5 to 255 seconds covers momentary functions like a gate trigger, and bistable mode covers anything that latches.

Voltage protection cuts the relay out below 6.5 V or above 36.5 V, and temperature protection trips over 149F at the installation site or 185F inside the relay. Those are the protections that stop a fault condition turning into a fire. The DIN Holder accessory mounts it on a 35 mm DIN rail.

Key features

  • 13 A at 110-230 V AC or 5 A at 24 V DC, enough for lighting circuits and gate operators
  • Dry contact independent of the load, so it drives third-party equipment directly
  • Pulse mode from 0.5 to 255 s plus bistable, covering momentary and latching functions
  • Voltage and temperature protection that cuts out automatically on a fault condition
  • Normally open or normally closed contact state, configurable
  • DIN rail mountable with the DIN Holder accessory

System requirements

Requires an Ajax hub or range extender. Powered from 7-24 V DC. The relay does not supply power to connected devices. Cable 22-14 AWG.

Brand:
AJAX
Radio communication range:
Up to 3,250 ft in open space, between the device and a hub or range extender
Power input:
7-24 V DC. The relay does not supply power to connected devices
Energy consumption:
Up to 1 W in standby
Maximum resistive load:
Up to 5 A at 24 V DC, up to 13 A at 110-230 V AC
Maximum inductive or capacitive load:
Up to 3 A at 24 V DC, up to 8 A at 110-230 V AC
Cable cross-section:
0.75-1.5 sq mm (22-14 AWG)
Voltage protection:
Cuts out below 6.5 V or above 36.5 V
Temperature protection:
Over 149F at the installation site, or over 185F inside the relay
Operation modes:
Pulse (0.5 to 255 s) or bistable
Contact state:
Normally open or normally closed
Related accessory:
DIN Holder for 35 mm DIN rail mounting
Dimensions:
1.54 x 1.3 x 0.71 in
Device weight:
0.88 oz
Region:
9NA, North America model
Radio protocol:
Jeweller, two-way encrypted wireless
Frequency band (North America):
905.0-926.5 MHz, certified to UL/ULC standards
Radio modulation:
GFSK with frequency hopping
Encryption:
Block encryption with a dynamic key
Communication loss detection:
After 36 seconds
Anti-spoofing:
Device authentication
Warranty:
24 months
Does the relay power the device it switches?
No. It provides a dry contact only and does not supply power to connected devices. The load needs its own supply.
What happens if the supply voltage goes out of range?
The relay turns off automatically below 6.5 V or above 36.5 V. It also cuts out on temperature, over 149F at the installation site or 185F internally.
Can it trigger a gate operator?
Yes. Pulse mode with an adjustable duration from 0.5 to 255 seconds suits momentary trigger inputs on gate and door equipment. Bistable mode covers anything that latches.
Can it be mounted in a consumer unit?
Yes, using the DIN Holder accessory, which clips it to a 35 mm DIN rail with no tools required.
Does this device need an Ajax hub?
Yes. All Jeweller devices report to an Ajax hub or a range extender. The device cannot operate standalone and does not connect to a third-party panel directly.
What does the 9NA region code mean?
It is the North America model, operating on the 905.0-926.5 MHz Jeweller band certified to UL/ULC standards. European models on 868 MHz are not interchangeable with it.
How quickly is a lost device detected?
Within 36 seconds. Jeweller polls each device continuously, so a jammed, removed or failed device is reported rather than quietly going offline.

Technical Specifications