Ajax 12 PSU NVR - 12V Power Supply for NVR

The reference 112255.305.NC power supply is a 12 V power supply module specifically designed for Ajax Network Video Recorders (NVRs).

It replaces the standard 110–230V power supply inside the NVR enclosure to allow the device to be operated from a low-voltage source or battery, which is especially useful on installations where mains power is not stable or is not available.

This module is compatible with both 8-channel and 16-channel Ajax NVRs and provides a stable output voltage of 12V ± 3%, enough to continuously power the recorder without interruption. It supports a flexible input voltage range, allowing the logger to be powered directly from a battery or other DC source between approximately 8V and 16V, depending on how the internal jumpers are installed.

The module is designed to be installed inside the NVR enclosure as a replacement for the standard power supply, avoiding cumbersome cables from the outside and securing installation. It provides protection against full discharge when the voltage drops too much, automatically shutting down the unit to preserve the battery. Its compact design makes it easy to integrate into loggers without major modifications.

This power supply is ideal for video surveillance systems integrated with Ajax security solutions, ensuring reliable and continuous power even in the event of a fluctuation or interruption of mains power.

Technical Specifications – Ajax 12V Power Supply (112255.305.NC)

General

• Type: Internal Power Supply for Ajax NVR

• Colour: Black / metallic depending on model

• Compatible with: 8-channel and 16-channel Ajax NVR

• Use: Indoor

• Installation: in the NVR case

Power & Voltage

• Input voltage: ~8 V to 16 V DC

• Output voltage: 12 V DC ±3%

• Maximum current supplied: ~2 A (depending on NVR model)

• Overvoltage and undervoltage protection: built-in

• Full battery discharge protection: yes

Connectivity & Compatibility

• Connectors: Internal terminal block for NVR

• Compatible with all Ajax NVRs that require 12V DC internal

• Allows power supply via external battery or DC power supply

Operating Conditions

• Operating temperature: 0 °C to +40 °C

• Maximum humidity: ≤75%

• Intended use: indoor, protected from moisture

Dimensions & Weight

• Approximate dimensions: ~60 × 40 × 20 mm

• Weight: ~120 g

Security & Features

• Overcurrent and overvoltage protection

• Automatic shut-off to prevent full battery discharge

• Easy integration into the NVR without housing modifications

• Designed for reliable, continuous operation

Summary

The 112255.305.NC module provides stable and secure power to an 8 or 16 channel Ajax NVR via battery or DC source, providing a reliable solution for installations where mains power may be unstable or unavailable. Its built-in protection protects equipment and battery, and its compact internal installation simplifies integration.