The Ajax Relay Jeweller is a wireless dry contact relay for remotely controlling powered devices and appliances through the Ajax app and automation scenarios. With high load ratings, pulse and bistable modes, encrypted Jeweller communication and a tiny footprint, it lets you integrate lighting, gates, locks and other equipment into your Ajax system.
Ajax Relay Jeweller Wireless Dry Contact Relay for Appliance Control
The Ajax Relay Jeweller (model RL.Y.J) is a wireless dry contact relay with a potential-free output, used to remotely switch and control powered devices such as lighting, gates, garage doors, electric locks and other appliances. It is operated manually from the Ajax app or automatically through scenarios based on arming, schedules, alarms or environmental conditions.
Its compact size allows it to be built into electrical enclosures and appliance housings, extending Ajax smart-home and automation control to almost any powered equipment.
Wireless Appliance Control
The relay provides a potential-free (dry contact) output that can be switched on and off remotely, allowing you to control connected devices from anywhere via the Ajax app. It operates in pulse or bistable modes with a configurable contact state (normally open or normally closed).
High Load Ratings
The relay handles substantial loads: up to 13 A at 110–230 V~ and up to 5 A at 24 V⎓ for resistive loads, making it suitable for a wide range of household and commercial equipment. Built-in voltage and temperature protection automatically switch the relay off outside safe limits.
Automation Scenarios
The relay can be triggered by a wide range of automation scenarios — by arming or disarming, schedule, alarm, temperature, humidity or CO₂ level, or from an Ajax Button or LightSwitch — enabling powerful smart-home and security automation.
External Power Required
The relay is powered from an external 7–24 V⎓ supply and does not itself supply power to connected devices. Adjustable pulse duration from 0.5 to 255 seconds gives precise control over momentary actions such as opening a gate.
Secure Jeweller Communication
The relay communicates with the Ajax hub over the encrypted, two-way Jeweller protocol at a range of up to 1,000 metres in open space, with frequency hopping and block encryption.
KEY BENEFITS
- Remotely control lighting, gates, locks and appliances
- Potential-free dry contact output
- High load capacity up to 13 A at 110–230 V
- Pulse and bistable operating modes
- Normally open or normally closed contact
- Wide range of automation scenarios
- Built-in voltage and temperature protection
- Encrypted Jeweller wireless communication
- Tiny footprint fits inside enclosures
- Adjustable pulse duration 0.5–255 s
KEY FEATURES
- Wireless dry contact relay
- Potential-free output
- Max resistive load 13 A at 110–230 V~ / 5 A at 24 V⎓
- Max inductive load 8 A at 110–230 V~ / 3 A at 24 V⎓
- Pulse and bistable modes
- Normally open / normally closed contact
- External power 7–24 V⎓ (up to 1 W standby)
- Does not supply power to connected devices
- Adjustable pulse duration 0.5–255 s
- Automation by arming, schedule, alarm, temperature, humidity, CO₂
- Secure Jeweller two-way wireless protocol
- Communication range up to 1,000 m in open space
- Compact 39 × 33 × 18 mm housing
- Operating temperature −20°C to +64°C
- IP20 rating (use sealed enclosure outdoors)
- DIN holder support (sold separately)
IDEAL FOR
- Controlling lighting circuits
- Gates and garage doors
- Electric locks and access control
- Irrigation and pumps
- Heating and appliance control
- Smart-home automation
- Professional Ajax security and automation systems
SYSTEM COMPATIBILITY
- Compatible with Ajax Hub 2 (2G)
- Compatible with Ajax Hub 2 (4G)
- Compatible with Ajax Hub 2 Plus
- Compatible with Ajax Hub Hybrid (2G)
- Compatible with Ajax Hub Hybrid (4G)
- Compatible with Ajax ReX 2 range extender
- Uses Ajax Jeweller encrypted wireless communication
- Managed via Ajax mobile applications (iOS and Android)
- Managed via Ajax desktop applications (Windows and macOS)
- Supports Ajax Cloud remote management
- Supports Over-the-Air (OTA) firmware updates
| Specification |
Details |
| Brand |
Ajax |
| Model |
Relay Jeweller |
| Article Number |
38204.19.NC1 |
| Device Model Code |
RL.Y.J |
| Product Type |
Wireless Dry Contact Relay |
| Output |
Potential-free (dry contact) |
| Operating Modes |
Pulse / Bistable |
| Contact State |
Normally Open / Normally Closed |
| Max Resistive Load |
13 A at 110–230 V~ / 5 A at 24 V⎓ |
| Max Inductive Load |
8 A at 110–230 V~ / 3 A at 24 V⎓ |
| Pulse Duration |
0.5–255 s (adjustable) |
| Power Supply |
External 7–24 V⎓ (up to 1 W) |
| Wireless Technology |
Jeweller |
| Radio Communication Range |
Up to 1,000 m (open space) |
| Operating Temperature |
−20°C to +64°C |
| Operating Humidity |
Up to 75% |
| Protection Rating |
IP20 |
| Dimensions |
39 × 33 × 18 mm |
| Weight |
25 g |
| Colour |
Black |
| Indoor / Outdoor |
Indoor (or outdoor in sealed enclosure) |
| Warranty |
24 Months |
FREQUENTLY ASKED QUESTIONS (FAQs)
What is the Ajax Relay Jeweller used for?
It is a wireless dry contact relay used to remotely switch and control powered devices such as lighting, gates, locks and appliances through the Ajax app and automation scenarios.
Does the relay supply power to connected devices?
No. The relay provides a potential-free (dry contact) output and does not supply power itself. It requires an external 7–24 V power supply to operate and switches the connected circuit.
What loads can it handle?
It handles up to 13 A at 110–230 V~ and up to 5 A at 24 V⎓ for resistive loads, with built-in voltage and temperature protection that switches it off outside safe limits.
What is the difference between pulse and bistable modes?
In pulse mode the relay closes the contact for a set duration (0.5–255 s) — ideal for opening a gate. In bistable mode it stays on or off until switched again — ideal for lighting.
Can it be triggered automatically?
Yes. It supports automation scenarios by arming/disarming, schedule, alarm, temperature, humidity or CO₂ level, and from an Ajax Button or LightSwitch.
Can it be used outdoors?
It carries an IP20 rating and is suitable for outdoor use only when installed inside a hermetically sealed enclosure.
