Only a qualified electrician must install Relay Jeweller, regardless of the type of electrical circuit to which the relay is connected.
Relay Jeweller can be used to block magnetic card-mediated access to the premises when the security system is armed. The user can also manage the power supply of the access control system (ASC) magnetic reader manually via the Ajax app, Button Jeweller press, or automatically, using a scenario.
The relay opens and closes electrical circuits and controls the power supply to electrical appliances. Relay Jeweller is a low-current remote control relay with a potential-free “dry” contact.
For more complex systems, the Ajax portfolio includes MultiRelay Fibra, a four-channel relay, and Superior MultiTransmitter IO (4X4) Fibra, an integration module with two relays.
How does ACS work
When a key card is brought close to the magnetic reader, the signal is transmitted to the ACS controller, which sends a pulse or breaks the power supply circuit of the lock. The latter is followed by the door opening for the time specified in the access control settings.
Schematic diagram of connecting the Relay Jeweller to a magnetic reader
According to the schematic diagram, you must have an external 12/24 V power source.
- Connect the power supply to the power terminals of the relay.
- Connect the “+” terminal of the power supply to one of the relay contact terminals, and the “+” terminal of the magnetic reader to the other contact terminal of the relay.
- Connect the “–” terminal of the magnetic reader to the “–” terminal of the power source.
This connection scheme enables the Relay Jeweller to control the power supply to the magnetic reader.
Take care in advance of the feasibility of disconnecting the ACS in the case of an emergency!
Magnetic Reader Power Management
Relay Setup
- Open Ajax app and select the space.
- Go to the Devices tab
. - Enter the Relay Jeweller menu, go to Settings and select Bistable operation mode, and also set Initial state of contact terminals as Normally closed.
Manual control of the ACS
Click the switch in the Relay Jeweller line — the state of the relay contact terminals will become the opposite.
When the Relay Jeweller contact terminals are closed, the power is supplied to the reader and the door can be opened with a key card. When the contact terminals are opened, the reader is left without power and the door remains closed.
Automatic power supply management of the ASC
Create a scenario to activate one or several ACSs automatically when arming/disarming the security system, by alarm or Button press, as well as according to a schedule.
A scenario can be created in the Relay Jeweller settings: Devices 
→ Relay Jeweller → Settings 
→ Scenarios.
Additional features
An electric lock can be managed automatically when the security state changes according to the unavoidability principle (in German, Zwangsläufigkeit).
