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

The AXIS P3935-LR is a network camera specifically developed for monitoring interior spaces in trains and buses. It complies with relevant transport industry standards, including EN50155, EN45545, and NFPA 130, making it suitable for use in public transport vehicles. The device features a fixed lens with a focal length of 3.6 mm and provides a resolution of HDTV 1080p, ensuring clear and detailed video recordings. The camera is equipped with Axis Lightfinder and Axis Forensic WDR, technologies that guarantee colour accuracy and detail precision even under low light conditions or in near-total darkness. For use in dark environments, integrated invisible IR-LEDs (940 nm) are provided, enabling video security even without visible light.

Applications

The camera is primarily designed for use in the interiors of trains, buses, and other public transport vehicles. Compliance with standards EN50155, EN45545, and NFPA 130 ensures suitability for environments with heightened requirements for safety, reliability, and fire behaviour. The robust construction with a vandalism-resistant metal housing also makes the camera suitable for environments where mechanical stress or attempted damage may occur.

Functions and Equipment in Detail

The AXIS P3935-LR features an integrated microphone, enabling audio monitoring and recording. This complements video surveillance with acoustic information, especially in situations where visual details are limited. The camera is equipped with advanced security features that prevent unauthorised access to the system and protect the integrity of surveillance data. Additionally, the camera includes EIS (Electronic Image Stabilization), which contributes to stable and clearer image reproduction in moving vehicles.

Technology Explained Simply

The Axis Lightfinder technology optimises image quality in low light by adjusting sensor sensitivity to reveal details without overexposing or underexposing the image. Axis Forensic WDR (Wide Dynamic Range) ensures that details in both shadowed and bright areas are preserved, even in scenes with strong contrast between light and dark regions. The invisible IR-LEDs (940 nm) emit infrared light that is not visible to the human eye but sufficient for the camera’s sensor to capture video in complete darkness. The M12 connector system ensures a secure and weather-resistant connection, particularly in moving vehicles.

Compatibility and Accessories

The camera is equipped with a fixed lens (3.6 mm focal length) and can be extended with compatible accessories. These include, for example, M12 lenses in various focal lengths (e.g. 2.1 mm, 2.8 mm, 3.6 mm), available in packs of 10. For power supply via the network cable (PoE), PoE extenders such as the TU8010 (2-port) or TU8011 (4-port) can be used. Additional compatible components include PoE midspan modules such as the TU8004 (90 W) or T8120 (15 W, 1-port), as well as network switches like the T8524 (24-port) or T8504-E (4-port, outdoor). For mounting, wall brackets such as the TM3101 or T94D02S (pack of 10) are available. The camera can also be combined with audio accessories such as the microphone T8353A or an LED indicator.

Installation and Mounting

The camera is connected via an M12 connector system, ensuring a secure and weather-resistant connection. Mounting is done using appropriate brackets selected for the specific environment (e.g. wall, ceiling). Installation requires a network connection and PoE-compatible power supply, with the camera powered via the network cable (PoE). The integrated EIS function supports image stabilisation in moving vehicles, simplifying installation in public transport.

Operational Advantages

The combination of a vandalism-resistant metal housing, IP66 and IP67 certification, and IK10 protection class ensures high mechanical and weather-resistant robustness. The integrated IR-LEDs and Lightfinder technology enable effective monitoring even under poor lighting conditions. Audio recording via the integrated microphone complements video surveillance and improves the traceability of incidents. Compliance with standards EN50155, EN45545, and NFPA 130 ensures suitability for use in public transport vehicles and simplifies approval processes for operators.