Product Overview

Compact LiFePO4 Emergency Conversion Solutions

The ELEDD MIDI 54L range of LED lithium emergency drivers have been designed to enable conversion of general lighting for emergency operation.

The range comprises pre-wired kits containing a driver, a battery, the battery mounting accessories, and LED indicator. All components are also available to order individually.

Each variant has controlled current SELV compliant outputs, suitable for driving multiple power LEDs or multi-chip LED arrays with forward voltages (Vf) of 6V to 54V, and built-in adaptability that allows for optimum output current based on the forward voltage of the specific light engine for a more precise match to the controlled LED scheme. The range includes options for standard and DALI-2* technology to drive 3-hour rated emergency duration.

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MIDI 54L Technical Specifications


Supply voltage220V - 240V

Supply frequency50/60 Hz

Supply current (max)40 mA

Power factor0.7

Input Power3.5W - 4.0W

Output voltage6V - 54V

LED Current

2.3W40mA - 440mA

3W45mA - 600mA

4W70mA - 840mA

Ambient temperature (ta)0°C to +55°C

Max case temperature (tc)70°C

Conductor size0.5mm² - 0.75mm²

Battery charge voltage3.4V - 3.6V

Battery discharge voltage2.8V - 3.6V

Emergency LED power2.3W / 3W / 4W

Response time< 500ms

Emergency duration3 hours

Initial charge period24 hours

Recharge period (max)16 hours

Weight of control gear72g

Battery Charge Management
Battery Charge Management applies an intermittent charging duty cycle designed for use with LiFePO4 batteries. This provides energy efficient charging maintenance, reduced operating temperatures and optimum service life of LiFePO4 batteries.
Technology Options
For applications where self-testing is not required or suitable, the non-AutoTest® option provides the same quality and performance expected of Mackwell products, without the AutoTest® feature.

DALI provides benefits by enabling testing and monitoring of an emergency lighting system via a standardised protocol, either on-site or via an internet connection. DALI is ideal for monitoring larger buildings and multiple sites. DALI-2 is the new generation of the standard that has now been extended to include emergency lighting. This improves interoperability and in future will introduce sophisticated diagnostic capabilities. All DALI products default to standalone AutoTest when not connected to a DALI network.
Relevant Standards
  • EN 61347-2-7
  • EN 61347-2-13
  • EN 60598-2-22
  • BS 5266-1
  • EN 62034
  • EN 62386
  • EN 62384
  • ICEL 1004
  • EN 55015
  • EN 61000-3-2
  • EN 61000-3-3
  • EN 61547
ELEDD MIDI 54L is available with a range of LiFePO4 rechargeable battery options. For details please check the final page of the datasheet.
For 1 hour emergency operation, please contact Mackwell for further details

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MIDI 54L Product Ranges

Standard / Non-Autotest
Conversion Kits 
Containing a Driver, a battery with mounting clips and an indicator LED
Order Code Description
9006539 ELEDD MIDI 54V 2.3W LiFePO4 3H Conversion Kit 
9006551 ELEDD MIDI 54V 3.0W LiFePO4 3H Conversion Kit
9006559 ELEDD MIDI 54V 4.0W LiFePO4 3H Conversion Kit

Modules only
Order Code Description
9006571 ELEDD MIDI 54V 2.3W LiFePO4 3H 
9006245 ELEDD MIDI 54V 3.0W LiFePO4 3H
9006575 ELEDD MIDI 54V 4.0W LiFePO4 3H
Conversion Kits 
Containing a Driver, a battery with mounting clips and an indicator LED
Order Code Description
9006545 ELEDD MIDI 54V 2.3W LiFePO4 3H Conversion Kit DALI 
9006555 ELEDD MIDI 54V 3.0W LiFePO4 3H Conversion Kit DALI
9006565 ELEDD MIDI 54V 4.0W LiFePO4 3H Conversion Kit DALI

Modules only
Order Code Description
9006573 ELEDD MIDI 54V 2.3W LiFePO4 3H DALI
9006247 ELEDD MIDI 54V 3.0W LiFePO4 3H DALI
9006577 ELEDD MIDI 54V 4.0W LiFePO4 3H DALI
Order Code Description
9006579 Battery LiFePO4 3.6Ah Single Cell 26650 with mounting clips
9006249 Battery LiFePO4 4.5Ah 3 Cell 18650 Stick with mounting clips
9006580 Battery LiFePO4 3.6Ah 2 Cell 26650 Stick with mounting clips
LED Indicators
Order Code Description
9006250 450mm Diffused Green LED - Standard
9006251 450mm Diffused Bi-Colour LED - DALI

* Other variants may be available on request. Contact your Mackwell sales representative for further information.
Order Code Description
9006530 Driver Terminal Cover / Strain Relief Kit

Key Features

  • Fully kitted conversion packs
  • Self-contained emergency lighting LED driver
  • DALI-2* level interoperability
  • Compatible with LED modules with a forward voltage 6-54V
  • Low profile casing with optional strain relief kit
  • Constant power output
  • Deep discharge protection
  • Intelligent battery management
  • 3-hour rated emergency duration
  • SELV output
  • Extended warranty

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For more information, please call us on +44 (0) 1922 458 255 or send us a message below.

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