Tendo Rack_3hr emergency maintained supply rack

3hr emergency maintained supply 

19" rack mount casing to complement iDrive centralised CC driver range

Non maintained, DALI and self test variants

Enables 4 outputs to be maintained in emergency mode

Forward voltage capability of 6-55V

Integrated electrical protection

Automatic current regulation to maintain light output for 3hr duration
Tendo Rack_3hr emergency maintained supply rack
Product Description

The iDrive Tendo Rack is designed to equip a wide range of LED fixtures with an emergency feature. The Tendo is suitable for most standard LED luminaires and arrays containing from 2 to 20 LEDs in series (6 to 55V DC). This rack mounted configuration is designed to work optimally with our constant current centralised driver solutions.

The Tendo rack is inserted into the low voltage connection between the LED driver rack and LED fixture allowing LEDs to be operated as normal under mains healthy conditions or at a reduced light output in emergency mode.

The Tendo range automatically adjusts the output LED current to provide the best match between the battery and the load, providing maximum illumination whilst ensuring full battery duration. The Tendo range is compatible with a wide range of LED emitters and arrays such as Philips Fortimo ranges, Bridgelux COB ranges, Citizen 4-41W ranges, GE Infusion, Xicato and many others.

The rack mounted case shows indication of charging for each channel and also a main power indicator.

For complete details on installation and maintenance please refer to product user guide.

All Versions:

  • 2 - 20 LEDs in series (6-55V)
  • Deep discharge protection
  • In-built constant current charge circuit
  • High temperature NiCd cells
  • Automatic adjustment of LED current to maintain 3 hours of illumination
  • Convenient rack enclosure
  • 4 output emergency capability
  • Indication of charging and mains supply


  • Complete DALI functionality (to IEC 62386-202: self contained emergency lighting
  • Automatic operational and monitoring tests over DALI network to BS 5266 (BS EN 50172)
  • Defaults to self-test if not on a DALI network
  • Pre-programmed tests: 3 hour commissioning, monthly 30 second function and annual 3 hour tests
  • Scheduling available through DALI network
  • Test results reported via LED indicators and DALI network

Self Test:

  • Microprocessor controlled self test circuit built-in
  • Pre-programmed tests: commissioning test; monthly function test and annual 3 hour test

Electrical Specifications


Mains Supply Voltage:  230 - 240V AC

Mains Power: 21W

Power Factor:  >0.9

Mains Frequency: 50Hz

LED Voltage Range: 6 - 55V
Number of LEDs in series: 2 - 20 (per channel)
LED Current Limit: 320mA
LED Voltage Limit: 55V
Battery Current Limit: 1100mA
Charge Current: 200mA nominal
Recharge Period: 24 hours
Battery Pack: 4 x 12Ah NiCd or NiMH on request
Battery Cur Off Voltage: 3.0V
Operating Temperature Range:  0ºC to 50ºC
Maximum Case Temperature: 70ºC
Maximum Battery Temperature: 55ºC



Integrated System
Technologies Ltd
Serenity House
55 Wellington Crescent

WS13 8RZ

Designed and manufactured in the UK, the leading iDrive® LED driver range comprises mains dimmable, DALI+, 1-10V,DMX and RDM solutions in ranges of 4W to 1000W of output power, with constant current and constant voltage options available.
The Dali LED Driver range is ideally suited to white, variable white and colour lighting fixtures for architectural, entertainment, retail, commercial and domestic applications.
IST are global pioneers in the design of intelligent iDrive® LED drivers and Serenity™ OEM LED lighting solutions for commercial, office, architectural, retail, entertainment, outdoor and domestic white light and RGB-W/A applications.
IST serves an international customer base, including several multinational lighting companies, providing bespoke or off-the-shelf solutions including the Dali LED Driver pictured above.
lighting solutions west midlands uk