AXIS P3947-R M12 2.8 mm 5MP Onboard Dome, Audio

Description
Detailed Specifications

Description

AXIS P3947-R Onboard Dome Camera – 5 MP AI-Powered Dome with Audio

The AXIS P3947-R is a rugged, AI-powered 5 MP indoor onboard dome with a built-in microphone, certified for use on trains and trams. Lightfinder 2.0 and Forensic WDR deliver true colors and detail in challenging light, scene profiles optimize image settings for each environment, and it shares the form factor, backplate and accessories of other Axis onboard cameras, so existing installations upgrade without new holes. Axis Edge Vault safeguards the device.

Key Specifications

Max video resolution	2592x1944
Max frames per second	25/30 fps
Lens	2.8 mm, F2.0, M12 mount (exchangeable)
Horizontal field of view	99°
Wide dynamic range	Forensic WDR, up to 120 dB
Lightfinder	Lightfinder 2.0
Min illumination (color)	0.16 lux at 50 IRE, F2.0
Audio	Built-in microphone (physical switch)
Connector	M12 (D-coded, rugged)
PoE class	Class 2
Rolling stock standards	EN 50155, EN 45545-2, NFPA 130 (M12 variants)
IP rating	IP66, IP67, NEMA 4X
Vandal rating	IK10
Operating temperature	-30 to 55 °C

Full specifications are listed in the Detailed Specifications tab.

Why Choose the AXIS P3947-R?

5 MP resolution (2592x1944) at up to 25/30 fps
2.8 mm, F2.0 M12 lens, 99° horizontal field of view, exchangeable for other M12 lenses
Lightfinder 2.0 and Forensic WDR for changing light
Built-in microphone for audio evidence, with a physical microphone switch
Complies with EN 50155, EN 45545-2, NFPA 130 (M12 variants) for rolling stock
Rugged casing rated IP66, IP67, NEMA 4X and IK10
Single-cable PoE (Class 2) over a rugged D-coded M12 connector
Axis Edge Vault hardware-based cybersecurity

Built for Rolling Stock

Certified to EN 50155 and EN 45545-2 for trains and trams (M12 variants), the IP66/IP67-, NEMA 4X- and IK10-rated aluminum and plastic casing shares the form factor, backplate and accessories of other Axis onboard cameras.

Clear Images in Changing Light

Lightfinder 2.0 and Forensic WDR (up to 120 dB depending on scene) deliver true colors and 5 MP detail in challenging light, and scene profiles (forensic, vivid, traffic overview) optimize settings without manual adjustment.

Flexible Field of View

The 2.8 mm, F2.0 M12 lens gives a 99° horizontal and 74° vertical field of view. Optional M12 lenses let you choose a wider or narrower view for each position in the vehicle.

Audio Capture

A built-in microphone lets you complement video with audio; it can be disabled with a physical microphone switch, and SIP support allows VoIP integration.

Built-In Cybersecurity

Axis Edge Vault provides a secure element (CC EAL 6+, FIPS 140-3 Level 3), secure boot, signed OS, signed video and an encrypted filesystem, with IEEE 802.1X and HTTPS/TLS.

Typical Applications

Bus and coach interiors
Train and tram passenger cars
Driver cabs and forward-facing views
Transit fleet retrofits

Compatible Accessories

Compatible accessories for the AXIS P3947-R. Linked items are available at Affinitech Store; contact us for the others:

AXIS TP3826-E Housing
AXIS Surveillance Card 256 GB (microSDXC)
AXIS Surveillance Card 512 GB
AXIS Lens M12 2.4 mm F2.1 IR
AXIS Lens M12 2.8 mm F2.0 IR
AXIS Lens M12 3.6 mm F2.0 IR
AXIS Lens M12 6 mm F2.0 IR
AXIS Lens M12 8 mm F1.6 IR
AXIS TP3843 Dome Cover Clear
AXIS TP3844 Top Cover Black

Compare AXIS P39 Onboard Cameras

Model	Max resolution	Type	Best for
AXIS P3905-R Mk III	1920x1080	Indoor onboard dome, 2 MP	Bus and train interiors
AXIS P3925-R	1920x1080	Indoor onboard metal dome, 2 MP	Bus and train interiors (EIS)
AXIS P3935-LR	1920x1080	Indoor onboard dome, 940 nm IR, mic	Interiors in darkness, with audio
AXIS P3925-LRE	1920x1080	Exterior onboard camera with IR, 2 MP	Vehicle exterior side views
AXIS P3945-R	1920x1080	AI onboard dome with audio, 2 MP	Train and tram interiors, audio
AXIS P3947-R (this camera)	2592x1944	AI onboard dome with audio, 5 MP	Train and tram interiors, 5 MP

Other versions: AXIS P3947-R RJ45 2.8 mm (03378-001), AXIS P3947-R RJ45 3.6 mm (03379-001), AXIS P3947-R RJ45 2.8 mm 10-pack (03378-021), AXIS P3947-R RJ45 3.6 mm 10-pack (03379-021), AXIS P3947-R M12 3.6 mm (03381-001), AXIS P3947-R M12 2.8 mm 10-pack (03380-021), AXIS P3947-R M12 3.6 mm 10-pack (03381-021).

Explore More

Browse the full Dome Cameras collection at Affinitech Store
See more AI-Powered Cameras at Affinitech Store

Frequently Asked Questions About AXIS P3947-R M12 2.8 mm

What resolution does the AXIS P3947-R capture?

Up to 2592x1944 (5 MP) at up to 25/30 fps.

What lens does it have?

A 2.8 mm, F2.0 M12 lens with a 99° horizontal and 74° vertical field of view. Optional M12 lenses are available.

Is it certified for buses and trains?

Yes. It complies with EN 50155, EN 45545-2, NFPA 130 (M12 variants).

What connector does this version use?

A rugged, female D-coded M12 connector with a rotatable coupling nut; it supports PoE.

How is it powered?

Power over Ethernet (IEEE 802.3af Type 1 Class 2), typical 3.55 W, max 4.42 W.

Does it have built-in IR?

No. For onboard IR, see the AXIS P3935-LR.

Does it record audio?

Yes, with a built-in microphone that can be turned off with a physical switch.

What is the minimum light sensitivity?

Color: 0.16 lux at 50 IRE, F2.0.

What are the operating conditions?

-30 to 55 °C, humidity 10-100% RH (condensing).

Does it support local storage?

Yes, microSD/microSDHC/microSDXC cards, plus recording to network-attached storage (NAS).

What warranty does it have?

A 5-year Axis warranty.

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Detailed Specifications

AXIS P3947-R Dome Camera Specifications

Specification	Details
Camera
Variant	AXIS P3947-R M12 2.8 mm
Image sensor	1/2.8" progressive scan RGB CMOS, pixel size 2.0 µm
Lens	2.8 mm, F2.0; M12 mount, fixed iris; minimum focus distance 1 m (3.2 ft)
Horizontal field of view	99°
Vertical field of view	74°
Minimum illumination	Color: 0.16 lux at 50 IRE, F2.0
Shutter speed	1/31500 s to 1/2 s
Camera adjustment	Pan ±30°, tilt 0–90°, rotation -179° to 180°
System on Chip (SoC)
Model	CV75
Memory	2 GB RAM, 8 GB Flash
Compute capabilities	Deep learning processing unit (DLPU)
Video
Video compression	H.264 (MPEG-4 Part 10/AVC) Main and High Profiles; H.265 (MPEG-H Part 2/HEVC) Main Profile; Motion JPEG
Resolution	4:3: 2592x1944 to 320x240 · 16:9: 2560x1440 to 640x360 · 11:9: 704x576 · 5:4: 720x576
Frame rate	2592x1944 (4:3) and 2688x1512 (16:9) at 25/30 fps with and without WDR · 1920x1080 at 25/30 fps with WDR, 50/60 fps without WDR
Video streaming	Up to 6 unique and configurable video streams (max 3 recommended); Axis Zipstream in H.264 and H.265; controllable frame rate and bandwidth; VBR/ABR/MBR H.264/H.265; video streaming indicator
WDR	Forensic WDR: up to 120 dB depending on scene
Noise reduction	Spatial filter (2D noise reduction), temporal filter (3D noise reduction)
Image settings	Saturation, contrast, brightness, sharpness, white balance, local contrast, tone mapping, exposure mode, exposure zones, compression, rotation 0°, 90°, 180°, 270° including corridor format, mirroring, text and image overlay, dynamic text and image overlay, privacy masks; scene profiles: forensic, vivid, traffic overview
Image processing	Axis Zipstream, Forensic WDR, Lightfinder 2.0
Pan/Tilt/Zoom	Digital PTZ, preset positions, limited guard tour, control queue
Audio
Features	Automatic gain control, 10-band graphic equalizer for audio input
Input	Built-in microphone (can be disabled), physical microphone switch
Built-in microphone	Max sound pressure level 128 dB; frequency range 100–10000 Hz
Encoding	LPCM 48 kHz, AAC-LC 8/16/32/44.1/48 kHz, G.711 PCM 8 kHz, G.726 ADPCM 8 kHz, Opus 8/16/48 kHz; configurable bitrate
Network
Network protocols	IPv4, IPv6 USGv6, ICMPv4/ICMPv6, HTTP, HTTPS, HTTP/2, TLS, QoS Layer 3 DiffServ, FTP, SFTP, CIFS/SMB, SMTP, mDNS (Bonjour), UPnP®, SNMP v1/v2c/v3 (MIB-II), DNS/DNSv6, DDNS, NTP, NTS, RTSP, RTP, SRTP/RTSPS, TCP, UDP, IGMPv1/v2/v3, RTCP, ICMP, DHCPv4/v6, ARP, SSH, LLDP, CDP, MQTT v3.1.1, Secure syslog (RFC 3164/5424, UDP/TCP/TLS), Link-Local address (ZeroConf)
System Integration
Application Programming Interface	Open API for software integration, including VAPIX®, metadata and AXIS Camera Application Platform (ACAP); one-click cloud connection; ONVIF® Profile G, M, S and T; VoIP through the Session Initiation Protocol (SIP), peer-to-peer or via PBX
Video management systems	Compatible with AXIS Camera Station Edge, AXIS Camera Station Pro, and video management software from Axis’ partners
Event conditions	Application; audio: physical microphone switch; call: state, state change; device status: above/below/within operating temperature, audit logs, IP address blocked/removed, live stream active, network lost, new IP address, system ready; edge storage: recording ongoing, storage disruption, storage health issues detected; I/O: manual trigger, virtual input; MQTT: client connected, stateless; scheduled and recurring: schedule; video: average bitrate degradation, tampering
Event actions	Calls: answer, end, make; LEDs: flash status LED; MQTT publish; notification: HTTP, HTTPS, TCP and email; overlay text; recordings; security: erase configuration; SNMP trap messages; images or video clips: FTP, SFTP, HTTP, HTTPS, network share and email; WDR mode
Built-in installation aids	Pixel counter, level grid
Analytics
Included	AXIS Tampering Detection, AXIS Video Motion Detection
Supported	AXIS Camera Application Platform (ACAP) third-party applications
Approvals
Product markings	BSMI, CE, ECE, FCC, KC, NOM, RCM, UL/cUL, VCCI, WEEE
Supply chain	TAA compliant, NDAA 2023 compliant
EMC	EN 55032 Class A, EN 55035, EN 61000-6-1, EN 61000-6-2, ECE R10 rev.06, EN 50498; Australia/New Zealand: RCM AS/NZS CISPR 32 Class A; Canada: ICES(A)/NMB(A); Japan: VCCI Class A; Korea: KS C 9835, KS C 9832 Class A; USA: FCC Part 15 Subpart B Class A; Rolling stock: EN 50121-3-2, EN 50121-4, IEC 62236-4
Safety	CAN/CSA C22.2 No. 62368-1 ed. 3, IEC/EN 62368-1 ed. 3, UL 62368-1 ed. 3, EN 45545-2 (M12 variants), NFPA 130 (M12 variants), UN ECE R118
Environment	EN 50155 OT1/ST2/H1 (M12 variants), IEC 60068-2-1, -2-2, -2-14, -2-27, -2-64, IEC 60529 IP66/IP67, IEC 62262 IK10, NEMA 250 Type 4X, IEC 61373 Cat 1 Class B (M12 variants), IEC 60721-3-5 Class 5M6
Network	NIST SP500-267, IPv6 USGv6
Cybersecurity	ETSI EN 303 645, FIPS 140
Cybersecurity
Edge security	Software: signed OS, brute force delay protection, digest authentication and OAuth 2.0 RFC6749 Client Credential Flow/OpenID Authorization Code Flow for centralized ADFS account management, password protection, Axis Cryptographic Module (FIPS 140-2 level 1) · Hardware: Axis Edge Vault cybersecurity platform; secure keystore: secure element (CC EAL 6+, FIPS 140-3 Level 3), system-on-chip security (TEE); Axis device ID, signed video, secure boot, encrypted filesystem (AES-XTS-Plain64 256-bit)
Network security	IEEE 802.1X (EAP-TLS, PEAP-MSCHAPv2), IEEE 802.1AR, HTTPS/HSTS, TLS v1.2/v1.3, Network Time Security (NTS), host-based firewall
General
Casing	IP66/67-, NEMA 4X- and IK10-rated aluminum and plastic casing
Mounting	Inside vehicles
Power	Power over Ethernet (PoE) IEEE 802.3af Type 1 Class 2; typical 3.55 W, max 4.42 W
Connectors	M12: female, rugged, D-coded with rotatable coupling nut; supports PoE
Storage	microSD/microSDHC/microSDXC card with SD card encryption (AES-XTS-Plain64 256-bit); recording to network-attached storage (NAS)
Operating conditions	-30 °C to 55 °C (-22 °F to 131 °F); maximum (intermittent) 70 °C (158 °F); humidity 10–100% RH (condensing)
Storage conditions	-40 °C to 65 °C (-40 °F to 149 °F); humidity 5–95% RH (non-condensing)
Weight	250 g (0.55 lb)
Box content	Camera, installation guide, Windows® decoder 1-user license, lens tool
Optional accessories	Lens M12 2.4 mm F2.1 IR (124°), 2.8 mm F2.0 IR (99°), 3.6 mm F2.0 IR (83°), 6 mm F2.0 IR (49°), 8 mm F1.6 IR (37°); AXIS TP3826-E housing, AXIS TP3843 Dome Cover Clear, AXIS TP3844 Top Cover Black
DORI	Detect 60.3 m (198 ft) · Observe 23.9 m (78 ft) · Recognize 12 m (39 ft) · Identify 5.9 m (19 ft)
Languages	English, German, French, Spanish, Italian, Russian, Simplified Chinese, Japanese, Korean, Portuguese, Polish, Traditional Chinese, Dutch, Czech, Swedish, Finnish, Turkish, Thai, Vietnamese
Warranty	5-year warranty