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This document describes the Lorex LNB4421 Series 4MP HD IR Bullet IP Camera, a device designed for surveillance and security applications. It provides comprehensive instructions for installation, connection, troubleshooting, and general usage.
The Lorex LNB4421 is an IP bullet camera capable of capturing 4-megapixel high-definition video. It features infrared (IR) capabilities for night vision, allowing it to record in low-light or dark conditions. The camera is designed to be integrated into a surveillance system, primarily with compatible Lorex Network Video Recorders (NVRs). It supports H.265 compression, which helps optimize storage space and bandwidth usage for recorded video. The camera includes an Auto Mechanical IR Cut Filter, which automatically adjusts between day and night viewing modes to ensure optimal image quality in varying light conditions. This filter produces an audible clicking noise during mode transitions, which is a normal part of its operation. The camera is rated for outdoor use, making it suitable for a variety of external surveillance needs, though installation in a sheltered location is recommended for enhanced durability.
The camera is designed for straightforward installation and operation. It can be connected to an NVR either directly via its Power over Ethernet (PoE) ports or through a router/switch on a local area network (LAN). For direct NVR connection, the camera powers up automatically via PoE. If connecting to a router/switch that does not support PoE, an optional 12V DC power adapter (model#: CVA4902, not included) is required.
Installation involves mounting the camera to a surface using provided screws and, if necessary, drywall anchors. The camera's stand offers significant adjustability: the base can rotate 360°, the camera body can twist 360° around the stand, and it can tilt up to 90°. These adjustments allow users to precisely position the camera for optimal viewing angles. An adjustment screw secures the camera's position once set.
The camera's Ethernet cable can be extended up to 300 feet (92 meters) using CAT5e (or higher) Ethernet cable and RJ45 couplers. For longer runs beyond 300 feet, a switch is required. An optional weather-resistant cap is provided for the Ethernet connection, which involves fitting an O-ring, connecting the cable, and securely twisting a barrel and end cap to ensure a tight, sealed connection, protecting against environmental elements.
The camera's performance can be optimized by following several guidelines:
The document emphasizes several maintenance and care points to ensure the longevity and optimal performance of the camera:
| Camera Type | Bullet |
|---|---|
| Image Sensor | 1/3" CMOS |
| Weather Resistance | IP66 |
| Power Supply | 12V DC |
| IR Cut Filter | Yes |
| Housing Material | Metal |
| Resolution | 4MP |
| Video Resolution | 2560 x 1440 |
| Operating Temperature | -22°F to 140°F (-30°C to 60°C) |












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