Technical data
Resolution	HDTV 1080p
Lens	Fix
Focus	3,6 mm
Dimmable

The AXIS P3925-R is a network camera in fixed dome design, specifically developed for monitoring interior spaces in trains and buses. The device features a resolution of HDTV 1080p and is equipped with a fixed lens with a focal length of 3.6 mm. The camera is designed for use in mobile transport vehicles and complies with relevant industry standards, including EN50155, EN45545 and NFPA 130, which define requirements for operational safety, fire protection and electrical reliability in vehicles.

Applications

The camera is primarily intended for use in the interior spaces of rail and bus vehicles, where reliable video surveillance under variable conditions is required. Compliance with the mentioned standards ensures that the camera meets specific requirements for electrical safety, environmental conditions and fire behaviour in public transport vehicles. The robust construction enables use in environments with mechanical vibrations and temperature fluctuations.

Functions and equipment in detail

The AXIS P3925-R offers the Axis Lightfinder technology, which enables colour accuracy and detail precision even under low lighting conditions. Additionally, the Axis Forensic WDR (Wide Dynamic Range) function supports image quality in scenes with strong contrast, such as daylight entering through windows and dark interior spaces. The camera features electronic image stabilisation, which ensures clear and shake-free recording during vehicle movement. The dimmable illumination allows adjustment of brightness to suit the respective environment, optimising image quality.

Technology explained simply

The camera is integrated into a vandalism-resistant metal housing certified to IK10, IP66 and IP67. These certifications mean the device is protected against mechanical impacts such as blows or shocks (IK10), against dust (IP66/IP67) and against water (IP66/IP67). IP67 indicates that the device can be submerged in water for a short time, making it suitable for use in damp or wet environments. The camera is designed for indoor use, but due to the IP certifications, it is also suitable for outdoor use under increased stress conditions.

Compatibility and accessories

The camera is equipped with an M12 connector, enabling a secure and robust connection to the network. Compatible accessories include M12 lenses with various focal lengths (e.g. 2.8 mm, 8 mm), mounting brackets such as the TM3101 Wall Mount or T94D02S, and network switches with PoE functionality, such as the T8524 Managed PoE+ Switch or the T8504-E Managed PoE Switch for outdoor use. Additional components include PoE midspan devices such as the T8120 or the 30W Midspan 240V AC, as well as memory cards for surveillance purposes in various capacities (128 GB, 256 GB, 512 GB, 1 TB). These components enable flexible and scalable installation in the vehicle network.

Mounting and installation

Mounting is done via the integrated M12 connection and the designated mounting points on the housing. The camera can be mounted on walls or ceilings, with the use of special mounting brackets such as the TM3101 or T94D02S recommended to ensure secure and stable positioning. Cabling is done via the network cable, which simultaneously enables data transmission and power supply via PoE (Power over Ethernet). Installation requires no additional power sources, as power is supplied through the network cable.

Advantages in operation

The camera offers high reliability in mobile environments due to its robust construction and compliance with relevant standards. Image quality remains high even under difficult lighting conditions, which is crucial for video analysis and identification of persons or events. The integrated security functions protect the system against unauthorised access and ensure the integrity of surveillance data. The combination of electronic image stabilisation and WDR technology ensures clear recordings even during vehicle movement.