173655.389.NC # 173655 - Ajax Superior MultiTransmitter (8 inputs) Fibra is a wired 8-input integration module designed to connect third-party devices to an Ajax security system, ideal for retrofitting and expanding existing installations. It supports NC, NO, EOL, 2EOL and 3EOL connections, pulse and bistable modes, KeyArm Zone and roller shutter control. Fibra technology ensures encrypted communication with the hub up to 2,000 m , regular polling and automatic firmware updates. Powered directly from the Fibra line, it has a 12 V output up to 500 mA for external devices and integrates protections against sabotage, spoofing, short circuits and cable breaks. Configuration and management are carried out via the Ajax app , with support for scenario-based automations and EN 50131 Grade 3 compliance.
173655.389.NC | WIRED MODULE FOR INTEGRATING UP TO 8 THIRD-PARTY DEVICES INTO THE AJAX SYSTEM

Ajax Superior MultiTransmitter (8 inputs) Fibra is a wired 8-input module designed to integrate third-party devices into Ajax security systems, ideal for retrofitting and expanding existing installations . It supports NC, NO, EOL, 2EOL and 3EOL connections, pulse and bistable modes, KeyArm Zone and roller shutter control. Fibra technology ensures encrypted communication with the hub up to 2,000 m , regular polling and automatic firmware updates. Powered directly from the Fibra line, it offers a 12 V output up to 500 mA and integrates protections against sabotage, spoofing, short circuits and cable breaks. Configuration via the Ajax app allows remote management, notifications and scenario-based automation, with EN 50131 Grade 3 compliance.
Main specifications:
- Inputs: 8 for third-party devices
- Connections: NC, NO, EOL, 2EOL, 3EOL
- Fiber: range up to 2,000 m
- Wired devices: connection up to 400 m
- Power supply: direct from the fiber line
- Output: 12 V up to 500 mA
- Protection: Anti-sabotage and anti-spoofing
- Management: Ajax apps and scenarios
- Standard: EN 50131 Grade 3
Further details
Technical data sheet
| 142171.367.NC | |
| Communication | Fiber data transfer protocol Proprietary wired protocol for transmitting commands, alarms, and other events. Key features:
4-core cable Connection to any point on the Fiber line Fiber line length up to 2,000 m up to 6,550 ft When a U/UTP cat.5 twisted-pair cable is used. Encrypted communication All stored and transmitted data is protected by block encryption featuring a dynamic key. |
| Wired device connection | Number of zones 8 wired zones Multiple devices can be connected to one zone. The number of connected devices depends on their power consumption. Cable length up to 400 m up to 1,300 ft For the EOL connection type, with a U/UTP cat.5 4×2×0.51 mm (24 AWG) cable with a copper conductor, or a 4×0.22 mm2 signal cable with a copper conductor (cable resistance of 22 Ω per 100 m) if the device is powered by an external power supply. he maximum connection length for devices powered by the integration module depends on cable resistance and the sensor current consumption. Type of connection NC, NO, EOL, 2EOL, 3EOL, or roller shutter With EOL resistance from 1 kΩ to 30 kΩ in increments of 100 Ω. EOL resistor scanning Allows automatic measurement of EOL resistance. Operating mode of connected sensors
pulse, bistable Event types configurable event types for wired device alarms Adjusted by a PRO or a user with admin rights in an Ajax app |
| Recommendations | The device is powered by 100–240 V~ mains and designed for indoor use only. It can be installed in Case D, which is sold separately. |
| Sabotage protection | Tamper alarm The board has a connector for a tamper board. The tamper board detects when the casing lid is opened and alerts users if someone attempts to detach the casing with the installed integration module from the surface. Protection against spoofing Ensures integration module authentication when it communicates with a hub. Protection against spoofing Ensures device authentication when it communicates with a hub. if there is no signal for 36 seconds or more Detection time depends on the Jeweler or Jeweller/Fibra settings. Instant detection of wired connection loss, short circuits, and faults when the 2EOL/3EOL connection is used Depends on the connection type Instant detection of short circuits at power outputs After detection, the system stops supplying power and sends a notification to the user. |
| Power supply | Fiber line 12−28 V⎓, up to 330 mA at a nominal voltage of 24 V⎓ Power supply of connected wired devices 11.5–12.5 V⎓, up to 500 mA at a nominal voltage of 12 V⎓ Maximum total current consumption by third-party devices at a nominal voltage of 12 V⎓ should not exceed 500 mA. Power terminals for input devices
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| Board | Dimensions dimensions 90 × 50 × 22 mm 3.54″ × 1.97″ × 0.87″ Weight 37 g 1.31 oz Operating temperature range from −10 °C to +40 °C from 14 °F to 104 °F Operating humidity up to 75% non-condensing |
| Complete set | Ajax Superior MultiTransmitter (8 inputs) Fiber Quick start guide |
| Warranty | 24 months |



