Lorex N843 Series - User Manual

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N843_QSG_EN_R2

Test your cameras prior to selecting a permanent mounting location by temporarily

connecting the cameras and cables to your NVR using one of the following 2 methods:

a. Connect cameras directly to the recorder (recommended).

N843 Series

Quick Setup Guide

Physical setup of recorder and essential system settings

b. Connect cameras to a PoE switch or router on your network (not included).

1 / 2

Connect the recorder to your router using the included Ethernet cable.

NOTES:

• It may take up to 1 minute for cameras to start up and transmit video to your recorder.

• This guide covers connecting IP cameras to your security recorder only. For full instructions on

installing your cameras, please refer to your camera’s documentation at lorex.com.

• Connecting cameras to a router, or a network switch without PoE, requires a power adapter for

each camera. Refer to your camera’s documentation at lorex.com for the correct power adapter

model number.

NOTES:

• If you are using a PoE switch, ensure the switch is connected to the same network as your

recorder.

• To receive automatic rmware updates and enable remote viewing with mobile apps, a high

speed Internet connection is required (minimum upload speed of 5Mbps required for 4K viewing;

3.5Mbps for lower resolutions). All other system features can be used without an Internet

connection.

As our products are subject to continuous improvement, Lorex reserves the right to modify product design, specications

Need Help?

Visit us online for up-to-date software

and complete instruction manuals

Click on the Downloads tab

Visit lorex.com

Search for the model

number of your product

Click on your product

in the search results

See the steps below (expanded instructions to the right) to complete initial setup of the

recorder:

Lorex Fusion supports connectivity with select wireless devices to the NVR. To learn more

about fusion connectivity and which Lorex devices are compatible with this feature, visit

lorex.com/pages/fusion.

* Not included / sold separately.

For camera compatibility information, visit lorex.com/compatibility.

STEP 1:

Connect cameras*

STEP 2:

Connect router*

STEP 3:

Connect mouse

STEP 5:

Connect power

STEP 4:

Connect monitor*

Overview of extra ports:

NOTE: For full instructions on using the extra ports, please refer to your security recorder’s instruction

manual at lorex.com.

Audio In/Out

Connect microphone / speaker*

Setting Up Your Recorder

USB MouseEthernet CablePower Adapter HDMI Cable

4K Ultra HD Security NVR

12.8” / 324mm

9.6” / 245mm

2.4”

60mm

Package Contents

Dimensions

Lorex Fusion

STEP 1: Connect cameras*

Connect the recorder to a monitor using the included HDMI cable or a VGA cable (not

included). The HDMI port supports up to 4K resolution, and VGA supports up to 1080p.

Connect the included mouse to a USB port on the recorder.

Use the included power adapter to connect the recorder to a nearby outlet.

IMPORTANT: To optimize picture quality, set the recorder’s video output to match the resolution of your

monitor. See the section Changing the Recorder’s Output Resolution on the rear for details.

Back panels shown below are for illustration only. Your recorder’s back panel

may appear different, with all the same ports in different locations.

STEP 2: Connect router*

STEP 3: Connect mouse

STEP 4: Connect monitor*

STEP 5: Connect power

To quickly open a window that displays vital system information such as device ID, model

number, rmware version, and IP address:

Reference: Quick Access to System Information

• Tap the button on the front panel of the recorder.

• Right-click to open the Quick Menu and click Info.

STEP 6:

Lorex Setup

Wizard

Record your password below and store in a secure place:

When you rst power up your recorder, the

Lorex Setup Wizard will begin. The Wizard will help you

congure core system settings.

You will also create a secure password. For future reference,

it is recommended that you record your password here:

STEP 6: Lorex Setup Wizard

N843_QSG_EN_R2.indd 1N843_QSG_EN_R2.indd 1 2021-04-08 4:25:17 PM2021-04-08 4:25:17 PM

Questions and Answers

S
Sarah Brown MDAug 10, 2025
What to do if Lorex N843 DVR is not receiving power?
- T
  Tyler HendersonAug 10, 2025
  If your Lorex DVR isn't powering up, first check that all power cables are securely connected, including the power adapter at the back of the unit. If the cables are connected but the system still isn't receiving power, ensure the system is powered on and that the LED indicators on the front are lit. If connected to a power bar or surge protector, try connecting the power adapter directly to a wall outlet. Also, verify the outlet is working by plugging another device, like a lamp, into it.
C
Christine PooleAug 26, 2025
Why is my Lorex N843 DVR hard drive not detected?
- J
  Jeffery MontgomeryAug 26, 2025
  If your Lorex DVR isn't detecting the hard drive, the issue might be due to loose or improperly connected hard drive cables. Remove the housing and ensure that all hard drive cables are firmly connected. Alternatively, the system may not have a hard drive installed. In that case, open the housing and install a compatible hard drive.

Overview

Function Description
Usage Features
Camera Connectivity
Network Connectivity
Monitor and Mouse Connection
System Navigation (Using the Mouse)
Smart Motion Detection & Deterrence Settings
Playback and Search
System Information
Maintenance Features
Backup
Changing the Recorder's Output Resolution
Firmware Updates
Troubleshooting and Support

This document outlines the quick setup and essential system settings for the Lorex N843 Series 4K Ultra HD Security NVR. It provides a comprehensive guide for users to install, configure, and manage their security system effectively.

Function Description

The Lorex N843 Series is a 4K Ultra HD Security NVR (Network Video Recorder) designed for surveillance applications. Its primary function is to record, store, and manage video footage from connected IP cameras, providing a robust solution for monitoring homes or businesses. The NVR supports high-resolution video, including 4K, ensuring clear and detailed images. It can connect to cameras directly or via a PoE switch/router, offering flexibility in network setup. The system also supports Lorex Fusion, allowing connectivity with select wireless Lorex devices to the NVR, expanding the surveillance capabilities.

Usage Features

The NVR offers a user-friendly interface accessible via a connected monitor and mouse. The initial setup is guided by the Lorex Setup Wizard, which assists users in configuring core system settings and creating a secure password.

Camera Connectivity:

Direct Connection: Cameras can be connected directly to the NVR, which is the recommended method.
PoE Switch/Router Connection: Cameras can also be connected to a PoE switch or router on the network. If connecting to a router or a network switch without PoE, each camera requires a separate power adapter.
Testing Cameras: Users are advised to test cameras temporarily before permanent mounting to ensure proper functionality.
Adding Cameras: The NVR supports adding cameras directly connected to the NVR or those on the same network as the recorder. This involves searching for devices, selecting the desired cameras, and adding them to the system. The system provides status indicators for successful connections.

Network Connectivity:

The NVR connects to a router using an Ethernet cable, enabling automatic firmware updates and remote viewing via mobile apps. A high-speed internet connection is recommended for optimal performance, especially for 4K viewing.

Monitor and Mouse Connection:

The NVR connects to a monitor via an HDMI or VGA cable. The HDMI port supports up to 4K resolution, while VGA supports up to 1080p.
A USB mouse is included for navigating the NVR's interface.

System Navigation (Using the Mouse):

Live View: In live view, users can move the mouse cursor over the bottom of the screen to open the Navigation Bar. This bar allows for quick access to various functions like playback, camera settings, and system information.
Quick Menu: Right-clicking on any live viewing screen opens the Quick Menu, providing options such as:
- Live Display: Change the display mode (e.g., 1 camera, 4 cameras, 9 cameras).
- Playback: Search and play back recordings.
- PTZ Control: Control PTZ cameras (if applicable).
- Camera Settings: Access camera-specific settings.
- Color Settings: Adjust image settings like brightness and contrast.
- System Setup: Access general system settings.
- Event Search: Search for events.
- Info: View system information.
- Start/Stop Sequence Mode: Initiate or stop camera sequencing.
- Warning List: View system warnings.
- Log Out: Log out of the system.
- Shut Down: Shut down the NVR.

Smart Motion Detection & Deterrence Settings:

The NVR supports smart motion detection features, which can be configured for specific cameras.
Configuring Smart Motion Detection: Users can select cameras, enable person/vehicle detection, and define active areas for motion detection. The system allows for scheduling when these features are active.
Active Deterrence: For compatible cameras, users can configure active deterrence features, such as warning lights and sirens, and set schedules for their operation.

Playback and Search:

Searching Recordings: Users can search for recordings by date and time. The system displays a timeline with different colors indicating continuous, motion, or deterrence recordings.
Playback Controls: Standard playback controls (play, pause, fast forward, rewind) are available. Users can also select the playback time and adjust the playback speed.
Event Search: The NVR allows searching for specific events, such as motion or deterrence events, to quickly locate relevant footage.

System Information:

A quick access feature allows users to open a window displaying vital system information, including device ID, model number, firmware version, and IP address, by tapping a button on the front panel or by right-clicking and selecting "Info" from the Quick Menu.

Maintenance Features

Backup:

The NVR supports backing up recordings from the hard drive to a USB flash drive.
Backup Process: Users can select the channel(s) to back up, specify the start and end times for recordings, and choose the file format (e.g., DAV, ASF, AVI). The system displays the estimated file size and remaining space on the USB device.
Viewing Backed Up Files: Instructions are provided for viewing backed-up files on a computer using the Lorex Player software.

Changing the Recorder's Output Resolution:

To optimize picture quality, users can change the recorder's video output resolution to match their monitor's resolution. This is done through the Main Menu, under Display settings. The system supports various resolutions, including 4K.

Firmware Updates:

The NVR is designed to receive automatic firmware updates when connected to the internet, ensuring the system remains up-to-date with the latest features and security enhancements.

Troubleshooting and Support:

The document advises users to visit lorex.com for up-to-date software, complete instruction manuals, and camera compatibility information.
It also provides guidance on connecting cameras to a router or network switch without PoE, noting the requirement for power adapters for each camera.
For full instructions on using extra ports or installing cameras, users are directed to the security recorder's instruction manual.

Lorex N843 Series Specifications

General

Operating System	Embedded Linux
Video Compression	H.264
Video Output	HDMI, VGA
Remote Viewing	Lorex Home App
Network Connectivity	Ethernet (RJ45)
Motion Detection	Yes
Mobile Alerts	Push Notifications
Operating Temperature	14°F to 131°F (-10°C to 55°C)