Johnson Controls M300MJ Fire Alarm Addressable Control Module
Johnson Controls M300MJ Fire Alarm Addressable Control Module
Condition: Used
[Standard Used Item Notes] This item is USED. Only the components visible in the photographs or explicitly mentioned in the listing are included. Peripheral accessories (such as keys, bases, mounting hardware, etc.) are not included unless otherwise stated. The item in the photograph may not be the exact one you receive; however, we strive to portray the average condition of all items accurately. Please carefully review this listing and its photos to assess the condition and contents. If you have any questions or require additional details, feel free to message us, and we will be happy to assist you.
Low stock: 1 left
Storewide Quantity discount: Save 5% on 2 items, 8% on 3 items, and 10% on 4+ items (applies automatically at checkout).
Couldn't load pickup availability
You will be prompted to create an account or sign in to complete your purchase.
As an eBay Partner, we may be compensated if you make a purchase.
Johnson Controls M300MJ Fire Alarm Addressable Control Module
The Johnson Controls M300MJ is a high-performance addressable control module designed to provide reliable signaling for fire alarm system peripheral devices. This unit ensures seamless integration with compatible fire alarm control panels to maintain robust life-safety monitoring and rapid response capabilities.
- Operating Temperature Rating: 32°F to 120°F (0°C to 49°C) - Compatibility: Intelligent addressable fire alarm systems - Mounting Style: Standard 4-inch square junction box - Voltage Range: 15 to 32 VDC - Communication Protocol: FlashScan or CLIP mode
Compared to legacy notification appliances, the M300MJ offers superior diagnostic feedback and simplified wiring requirements. It bypasses the limitations of older non-addressable systems by providing precise, device-specific status reporting, significantly reducing the maintenance burden and troubleshooting time for facility managers.
Advanced Signaling and System Integration
Engineered for mission-critical reliability, this module leverages advanced microprocessor-based technology to communicate effectively with the primary control panel. Its sophisticated design minimizes false alarms while ensuring that every connected peripheral device is supervised continuously for open or short circuit conditions, meeting the highest standards of safety compliance in modern commercial environments.
This item description was generated using artificial intelligence and may contain errors. Specifications and compatibility should always be verified using official manufacturer documentation and, where applicable, by a qualified or licensed fire alarm technician.
View full details
About us
We specialize in new, used, and surplus fire alarm and life-safety equipment. Our inventory includes control panels, modules, power supplies, annunciators, detectors, and related accessories from leading manufacturers. Listings reflect current, in-stock availability and are updated regularly. Orders ship quickly and are packed with care.
For additional details, please review our Terms of Service, Shipping Policy and Refund Policy before placing your order. Please contact us with any questions.