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 It is a common situation when your system is still capable of protecting your property but is clearly outdated.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, switch off the potential cause of ignition 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 device name, 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 using an appropriate code. A total of 9 types of alarms are available: intrusion, fire alarm, medical help, panic button, gas alarm, leakage, tamper alarm, malfunction, custom (service event).

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 frequencies 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 seconds

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 to 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 short circuit, disconnection of the signal cable, or tampering alarm. 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 surface and removal of the lid.
  • Instant connection loss detection with wired device (EOL)
  • Free space in the body for a backup battery 7 Ah
  • 2 tampers that detect dismounting and opening of the body
Protected against sabotage
  • Instant connection loss detection with wired device (EOL)
  • Free space in the body for a backup battery 7 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
via QR-code
on a wall
Wired devices
in the app

Tech specs

White, black
Compatibility with central units
Hub Plus
Hub 2 (2G)
Hub 2 Plus
Hub Hybrid (2G)
Hub Hybrid (4G)

* When using the Hub model, 2EOL and 3EOL connections are not available
Compatibility with range extenders
Remote configuration and testing
Number of zones for connecting devices
Supported detector connection types
NO, NC, EOL (with firmware version lower than 2.13.0)

NO, NC, EOL, 2EOL, 3EOL (with firmware version 2.13.0 and higher)

* When using the Hub model, 2EOL and 3EOL connections are not available
Resistance of EOL resistors
1 kΩ to 7.5 kΩ (for MultiTransmitter with firmware version lower than 2.13.0)

1 kΩ to 15 kΩ for each resistor with total resistance of 30 kΩ (for MultiTransmitter with firmware version 2.13.0 and higher)
Supported detector types
Pulsed and bistable
Event types for connected detectors
Tamper alarm
Fire alarm
Medical help
Panic button
Gas alarm
Main power supply
100-240 V, 50/60 Hz
Backup power
12 V⎓(from battery)
Supported battery type
Battery with 4 or 7 Ah capacity (not included in the complete set),
dimensions up to 150 × 64 × 94 mm
Power supply lines for connecting devices
Power supply voltage and current of connected devices
12 V⎓, up to 1 A for all power supply outputs
Protection against fraud
Radio frequency hopping
Two tampers: against opening and detaching from the surface
Alarm signal delivery time
0.15 s
Temperature sensor
Jeweller radio protocol
Communication range — up to 2,000 m in an open space
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 sales region

Maximum effective radiated power (ERP) up to 20 mW

Block encryption featuring a dynamic key

Polling interval: 12–300 s

Adjusted by PRO or user with admin rights in the Ajax app

Learn more
Operating temperature range
From -10°С to +40°С
Operating humidity
Up to 75%
196 х 238 х 100 mm
805 g
24 months from the date of sale

Learn more
Complete set
MultiTransmitter board
Installation kit
Power cable
12 V⎓ battery connection cable
Quick start guide
1 battery is not included in the complete set
2 support for 2EOL and 3EOL connection is available for MultiTransmitter with firmware version 2.13.0 and higher. A hub should have firmware version OS Malevich 2.13 or higher. When using the Hub model, 2EOL and 3EOL connections are not available.

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.

Recommended products

If you see any mistape, please select text and press Ctrl + Enter

Spelling error report

The following text will be sent to our editors: