Modular switch or socket technical guide
Legrand Mylinc DND & MMR External Unit with Bellpush 3 Module: technical guide
Legrand Mylinc DND & MMR External Unit with Bellpush 3 Module is a modular switch or socket from Legrand. Legrand Mylinc DND & MMR External Unit with Bellpush 3 Module - part of the Legrand Mylinc range. For hospitality / hotel function and accessories for indication purpose.
- Warranty: 2 years warranty provided by the manufacturer from date of purchase
- 3-Module Device
- Switch operating mechanically by rocker toggling
Pros
- 3-Module Device
- Switch operating mechanically by rocker toggling
- Flush and Surface -mounted Screw terminals
Cons
- Modules usually fit only plates and boxes of the same range
Key specifications
As stated by the maker.
- As per IS
- 3854
- Range
- Mylinc
- Catalogue Numbers
- 675556
- Warranty
- 2 years warranty provided by the manufacturer from date of purchase
- Country of Origin
- India
Warranty and validity
- Warranty
- 2 years warranty provided by the manufacturer from date of purchase (as stated by the maker)
How to use it
- Modular switches and sockets clip into a plate and a mounting box of the same range; each takes a stated number of modules.
- Match the current rating to the load: lights and fans run on lower-rated switches, while geysers, ACs and other heavy appliances need a higher-rated switch and socket on suitable wiring.
- Plan the plate size from the number of modules you need, counting blanks for a tidy layout.
Installation
- Have a licensed electrician fit it, with the supply switched off at the MCB.
- Use a mounting box and plate from the same range and module size, so the parts clip together properly.
- Tighten the terminal screws on the bare conductor only; loose terminals heat up and can melt the switch.
Care and maintenance
- Switch off the supply before cleaning, and wipe the plate with a dry or slightly damp cloth; never spray liquid onto it.
- Replace a switch or socket that sparks, buzzes, or feels warm to the touch.
- Keep heavy plugs out of a socket that is not rated for them.
Buying tips
- Buy switches, sockets, plates and boxes from one range, so the modules and finishes match.
- Check the current rating printed on each module against what you will plug or wire into it.
- Sockets with shutters keep children’s fingers and objects out of the live contacts.
Maker and compliance details
- Manufacturer / brand
- Legrand
- Country of origin
- India
- Model code
- 675556
Frequently asked questions
The maker states: 2 years warranty provided by the manufacturer from date of purchase. Keep the invoice; warranty claims go through the maker.
Only if its current rating suits the appliance’s load and the wiring behind it does too. Heavy appliances need a higher-rated switch and socket; ask an electrician to check.
Modules fit plates and boxes of the same range and module size. A different range or brand usually does not clip in.
Product facts are from the maker’s published data; the use, fitting and care advice applies to modular switch or sockets in general. Last updated 9 November 2026.