Module for connecting wired alarm to Ajax and managing security via the app

The second life of an old wired alarm

We understand how difficult it is to decide on a wired alarm upgrade. It is a common situation when your system is still capable of protecting your property but is clearly outdated. Renovating with Ajax doesn't force you to leave behind the current equipment. It gives you a chance to build modern complex security based on existing wired equipment.
The second life of an old wired alarm

Security via smartphone

With MultiTransmitter, system users get security control via app, data-rich notifications, and automation scenarios. An installer can set up the system or device in the PRO-app, both while on-site and remotely.

More Ajax features

Perimeter IR detectors, household gas sensors, thermostats, float sensors, and other devices are ready to expand the Ajax areas of use. Connect them to a hub via MultiTransmitter and manage the combined security system in the Ajax app.
More Ajax features

Multitasking in a single body

Multitasking in a single body

Less hassle with automated security

Use automation scenarios so that the security system instantly responds to threats without waiting for police. Ajax will be armed by schedule, turn on the light by the alarm of a motion detector, de-energize the room at the first sign of fire. With MultiTransmitter, an old alarm system becomes part of a safe and smart home.

Data-rich alarms

With MultiTransmitter, you can specify the type of alarm and a room for each wired device. This makes notifications more informative — you know not just what happened but where. This information is displayed using push notification, SMS, and is also sent to the security company's monitoring station under an appropriate code. A total of five types of alarms are available: intrusion, fire, medical assistance, panic button, gas leak.

Radio communication without reliability compromises

MultiTransmitter communicates with a hub via an encrypted Jeweller radio protocol. This is a TDMA technology developed by Ajax Systems for uninterrupted communication with devices. Jeweller detects jamming attempts, switches to the backup frequency in case of interference, and allows Ajax wireless devices to run on battery power for years.
  • Connection to a hub at a distance of up to 2000 meters
  • Alarms delivered in 0.15 seconds
  • Adjustable ping from 12 seconds2

Security without barriers

When using radio signal range extenders, Ajax security system's radio network can cover up to 35 km2. But if some rooms are impermeable for radio waves, connecting wired devices via MultiTransmitter is the best solution. The length of wires can reach 400 meters.

Protected against sabotage

MultiTransmitter will inform you instantly if the connected devices have been interrupted with power failure, disconnection of the signal cable, or tampering. Electricity loss at the site will not be a problem either — the backup battery can provide power to devices for up to 4 days. MultiTransmitter body itself is equipped with two tampers that respond to removal of the integration module from the mount and removal of the lid.
  • Instant connection loss detection with wired device (EOL)
  • Cavity in the body for a backup battery 7.2 Ah
  • 2 tampers that detect dismounting and opening of the body
Protected against sabotage
  • Instant connection loss detection with wired device (EOL)
  • Cavity in the body for a backup battery 7.2 Ah
  • 2 tampers that detect dismounting and opening of the body

Made by professionals for professionals

We made sure that the installation and setup process does not require any extra time or effort. Like other Ajax devices, MultiTransmitter connects to a hub in the app by scanning a QR-code. When connecting wired devices, you don't need to know the resistors' resistance values. The system will also warn you if a device was not connected correctly.
Adding to the system
by reading a QR-code
on a wall
Wired devices
via an app

Tech specs

Number of alarm/tamper zones
Supported detector contact types
NO, NC (without R), EOL (NC with R), EOL (NO with R)
Resistance of the EOL resistor
1 kΩ to 7.5 kΩ
Alarm signals processing mode
Pulsed or bistable
Main power supply
110–255 V, 50/60 Hz
Backup power
12 V DC
Supported battery type
Battery with 4 or 7 A⋅h capacity (not included),
dimensions 150 × 64 × 94 mm
Detector power supply
12 V DC, up to 1 A for all detector power supply outputs
Protection against dismantling
Jeweller radio protocol
Communication range — up to 2000 meters in a line of sight
Two-way communication between devices

Radio frequency bands:
866.0 – 866.5 MHz
868.0 – 868.6 MHz
868.7 – 869.2 MHz
905.0 – 926.5 MHz
915.85 – 926.5 MHz
921.0 – 922.0 MHz
(depends on the region of sale)

Auto-regulated radio signal power: ≤ 20 mW
Block encryption with a floating key
Detector ping interval: 12–300 seconds
Frequency hopping

Learn more about Jeweller
Operates only with Ajax hubs and range extenders
Maximum radio signal power
Up to 7.29 mW (25 mW limit)
Radio signal range
Up to 2,000 m in the line of sight
Operating temperature range
From -10°С to +40°С
Operating humidity
Up to 75%
196 х 238 х 100 mm
805 g
Replacement and repair for a period of 24 months from the date of sale.

Learn more
Service life
10 years
Complete set
MultiTransmitter board
Installation kit
Power cable
User Guide

Choose the most suitable Ajax set in 2 minutes

Tell us what you need to protect and we will put together a set of detectors and devices for your premises.

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