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

The AXIS P3935-LR is a network camera designed for indoor use in trains and buses, specifically developed for surveillance in rail and bus transportation. 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 ensure color accuracy and detail precision in low-light conditions and near-total darkness. For video security in completely dark environments, integrated invisible IR-LEDs (940 nm) are provided, which do not produce visible light.

Applications

The camera is designed for use in public transport vehicles such as trains and buses, where high requirements for reliability, safety, and environmental resistance apply. It complies with relevant industry standards, including EN50155, EN45545, and NFPA 130, which govern operational safety, fire protection, and electrical reliability in vehicles. These certifications guarantee that the camera functions under the specific conditions of public transport, including mechanical stress, temperature fluctuations, and potential fire hazards.

Features and Equipment in Detail

The AXIS P3935-LR features a vandal-resistant metal housing, certified to IK10, IP66, and IP67. These protection ratings mean the device is protected against mechanical impacts such as blows or shocks, as well as dust and water ingress, making it suitable for outdoor use as well. An integrated microphone enables audio surveillance and recording, allowing the camera to capture not only visual but also acoustic information. Additionally, advanced security features are integrated to prevent unauthorized access to the system and protect the integrity of surveillance data.

Technology Explained Simply

The camera uses a fixed lens with a 3.6 mm focal length, providing a fixed field of view and eliminating the need for manual focusing. The 1080p (Full HD) resolution ensures clear depiction of details, which is important for identifying people or objects. The Axis Lightfinder technology optimizes image quality in low light, while Forensic WDR (Wide Dynamic Range) balances contrasts in scenes with strong light differences, for example when viewing from a dark interior into bright daylight. The invisible IR-LEDs (940 nm) provide night vision without visible illumination, increasing the discretion of surveillance.

Compatibility and Accessories

The camera is equipped with an M12 connector, which is a standard connection for industrial and transportation applications. Compatible accessories include, for example, M12 lenses in various focal lengths (e.g. 2.1 mm, 2.8 mm, 3.6 mm), PoE-Midspan devices (e.g. 30 W, 90 W) for power supply over the network cable, network switches with PoE+ (e.g. T8524, T8516), surveillance SSDs in various capacities (128 GB, 256 GB, 512 GB, 1 TB), and mounting accessories such as the wall mount TM3101. The combination with PoE technology enables simplified installation, as both data and power are transmitted over a single cable.

Mounting and Installation

Installation is performed via the M12 connector, designed for robust industrial applications. The camera can be mounted at various locations within the vehicle, with the provided mounting bracket (e.g. TM3101) ensuring secure fastening. The camera is designed for use in vehicles, so installation should consider mechanical stresses and environmental conditions.

Operational Advantages

The camera offers high reliability under the specific conditions of public transport. Certifications to EN50155, EN45545, and NFPA 130 ensure compliance with industry-specific safety standards. The combination of high image quality, night vision functions, and an integrated microphone enables comprehensive surveillance. The robust construction and protection ratings IK10, IP66, and IP67 ensure a long service life even under harsh operating conditions. PoE support simplifies installation and reduces the number of required cables.