AXIS P3947-R Dome Camera
This rugged AI-powered indoor camera delivers great 5 MP image quality even in challenging light conditions. It’s available with an M12 or RJ45 connector and different lens options. A built-in microphone and audio-in let you complement video material with audio. It’s EN 50155 and EN 45545 certified for use on trains and trams. When used with manufacturer’s TP3826-E, it can be mounted externally on trams. Scene profiles help optimize image quality by selecting the right settings for each environment. With the same form-factor, backplate, and accessories as other manufacturer onboard cameras, it’s easy to upgrade existing installations. Furthermore, cryptographic compute module safeguards the device.
• Complies with transportation industry regulations
• Microphone and support for audio-in
• Scene profiles to optimize image settings
• Advanced low-light technology and advanced WDR imaging technology
• Built-in cybersecurity features with cryptographic compute module

Camera
Image sensor
1/2.8” progressive scan RGB CMOS
Pixel size 2.0 µm
Lens
2.8 mm, F2.0: 
Horizontal field of view: 99°
Vertical field of view: 74°
Minimum focus distance: 1 m (3.2 ft)
M12 mount, fixed iris
3.6 mm, F2.0: 
Horizontal field of view: 83°
Vertical field of view: 60°
Minimum focus distance: 0.3 m (1.0 ft)
M12 mount, fixed iris
See Optional accessories for exchangeable lenses
Minimum illumination
Color: 0.16 lux at 50 RE, 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)
System on Chip 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) @25/30 fps (with and without WDR)
2688x1512 (16:9) @25/30 fps (with and without WDR)
1920x1080 (16:9) @25/30 fps (with WDR)
1920x1080 (16:9) @50/60 fps (without WDR)
Video streaming
Up to 6 unique and configurable video streams

Controllable frame rate and bandwidth
VBR/ABR/MBR H.264/H.265
Video streaming indicator
WDR
advanced WDR imaging technology: 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
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 specification
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.

ONVIF® Profile G, ONVIF® Profile M, ONVIF® Profile S, and ONVIF® Profile T, specifications at onvif.org
Support for Voice over IP (VoIP) through the Session Initiation Protocol (SIP), using peer-to-peer (P2P) or Private Branch Exchange (PBX).
Onscreen controls
Wide dynamic range
Privacy masks
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, within operating temperature
Edge storage: recording ongoing, storage disruption, storage health issues detected
I/O: manual trigger, virtual input is active
MQTT: MQTT client connected, stateless
Scheduled and recurring: schedule
Video: average bitrate degradation, tampering
Event actions
Calls: answer call, end calls, make call
LEDs: flash status LED, flash status LED while the rule is active
MQTT: send MQTT publish message
Notification: HTTP, HTTPS, TCP and email
Overlay text: use overlay text, use overlay text while the rule is active
Recordings: record video, record video while the rule is active
Security: erase configuration
SNMP trap messages: send, send while the rule is active
Images or video clips: FTP, SFTP, HTTP, HTTPS, network share and email
WDR mode: set WDR mode, set WDR mode while the rule is active
Built-in installation aids
Pixel counter, level grid
Analytics
Applications
Included
tampering detection, video motion detection
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 (E approval), 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, UN ECE R118,
NFPA 130
EN 45545-2
Environment
IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-27, IEC 60068-2-64, IEC 60068-2-78, IEC 60068-2-14, IEC/EN 60529 IP66, IEC/EN 60529 IP67, IEC/EN 62262 IK10, NEMA 250 Type 4X (ingress of water and gasket test), IEC 60721-3-5 Class 5M3 (vibration and shock), IEC/EN 61373 Category 1 Class B
EN 50155: Class OT1/ ST2 (2021)
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, cryptographic module (FIPS 140-2 level 1)
Hardware: cryptographic compute module cybersecurity platform
Secure keystore: secure element (CC EAL 6+, FIPS 140-3 Level 3), system-on-chip security (TEE)
Manufacturer's device ID, signed video, secure boot, encrypted filesystem (AES-XTS-Plain64 256bit)
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
RJ45: 10BASE-T/100BASE-TX PoE
M12: female, rugged, D-coded with rotatable coupling nut
All connectors support PoE
Storage
Support for microSD/microSDHC/microSDXC card
Support for SD card encryption (AES-XTS-Plain64 256bit)
Recording to network-attached storage (NAS)
For SD card and NAS recommendations, refer to the manufacturer's webpage
Operating conditions
-30 °C to 55 °C (-22 °F to 131 °F)
Maximum temperature (intermittent): 70 °C (158 °F)
Humidity: 10–100% RH (condensing)
Storage conditions
Temperature: -40 °C to 65 °C (-40 °F to 149 °F)
Humidity: 5–95% RH (condensing)
Dimensions
For the overall product dimensions, see the dimension drawing in this datasheet.
Weight
250 g (0.55 lb)
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
Sustainability
Substance control
Compliant with the UNIFE Railway Industry Substance List (RISL)
PVC free, BFR/CFR free in accordance with JEDEC/ECA Standard JS709
RoHS in accordance with EU RoHS Directive 2011/65/EU and 2015/863, and standard EN IEC 63000:2018
REACH in accordance with (EC) No 1907/2006. For SCIP UUID, see echa.europa.eu
Materials
Renewable carbon-based plastic content: 25%
Screened for conflict minerals in accordance with OECD guidelines
Environmental responsibility

The manufacturer is a signatory of the UN Global Compact, read more at unglobalcompact.org
Detect, Observe, Recognize, Identify (DORI)
Manufacturer’s camera M12 2.8 mmManufacturer’s camera RJ45 2.8 mm	DORI definition	Distance	
Detect	25 px/m (8 px/ft)	9.45 m (31 ft)	
Observe	63 px/m (19 px/ft)	3.6 m (11.8 ft)	
Recognize	125 px/m (38 px/ft)	1.9 m (6.23 ft)	
Identify	250 px/m (76 px/ft)	0.95 m (3.12 ft)	
Manufacturer’s camera M12 3.6 mmManufacturer’s camera RJ45 3.6 mm	DORI definition	Distance	
Detect	25 px/m (8 px/ft)	10.6 m (34.78 ft)	
Observe	63 px/m (19 px/ft)	4.5 m (14.76 ft)	
Recognize	125 px/m (38 px/ft)	2.3 m (7.55 ft)	
Identify	250 px/m (76 px/ft)	1.2 m (3.94 ft)	
Key features and technologies
Built-in cybersecurity
Cryptographic compute module is a secure cryptographic compute module (secure module or secure element) in which the Manufacturer's device ID is securely and permanently installed and stored.
Secure boot is a boot process that consists of an unbroken chain of cryptographically validated software, starting in immutable memory (boot ROM). Being based on signed OS, secure boot ensures that a device can boot only with authorized device software. Secure boot guarantees that the Manufacturer's device is completely clean from possible malware after resetting to factory default.
Signed OS is implemented by the software vendor signing the software image with a private key, which is secret. When software has this signature attached to it, a device will validate the software before accepting and installing it. If the device detects that the software integrity is compromised, it will reject the upgrade. Signed OS is based on the industry-accepted RSA public-key encryption method.
TPM is short for Trusted Platform Module. A TPM is a component that provides a set of cryptographic features suitable for protecting information from unauthorized access. The private key is stored in the TPM and never leaves the TPM. All cryptographic operations requiring the use of the private key are sent to the TPM to be processed. This ensures that the secret part of the certificate remains safe even in the event of a security breach.
Exchangeable lenses
Different lens options offer the opportunity to adjust the field of view (FoV) of the product, and thereby adapt it to your chosen area of use. The lens can be easily changed, for example to make the product cover wider areas, or to make it focus on details or objects of interest.
Rugged
Rugged is a term that for manufacturer’s modular and onboard products describes a device’s endurance and stability in high vibration environments  – over time. High vibration environments could be inside or close to machinery or inside vehicles. Rugged products from manufacturer are constructed to keep operating in these challenging conditions for the entire lifetime of the product.