Modular switch or socket technical guide
Legrand Lyncus DND Cmr Indicator 1 Module + 1 Module Bell Push: technical guide
Legrand Lyncus DND Cmr Indicator 1 Module + 1 Module Bell Push is a modular switch or socket from Legrand. Legrand Lyncus DND Cmr Indicator 1 Module + 1 Module Bell Push - part of the Legrand Lyncus range. Enables the resident to inform hotel staff of the room status.
- Warranty: 2 years warranty provided by the manufacturer from date of purchase
- For 1 + 1 modules 45 x 45 mm For Hospitality / hotel function and accessories for indication purpose
- Double module mechanism Two settings are possible:-Do not disturb-Please clean the room
Pros
- For 1 + 1 modules 45 x 45 mm For Hospitality / hotel function and accessories for indication purpose
- Double module mechanism Two settings are possible:-Do not disturb-Please clean the room
- Indicator lamp and bell push Installed in the corridor, display calls
- Supplied with LED Square version
Cons
- Modules usually fit only plates and boxes of the same range
Key specifications
As stated by the maker.
- Range
- Lyncus
- Catalogue Numbers
- 677456
- 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
- 677456
Compare with similar products
| Specification | | |||
|---|---|---|---|---|
| Price | Ask for price | Ask for price | Ask for price | |
| Brand | Legrand | Legrand | Finolex | Jaquar |
| Range | Lyncus | Arteor Advance | — | Allure |
| Catalogue Numbers | 677456 | AA21108MB0, AA21108MT0, AA21108MW0 | — | — |
| Country of Origin | India | India | — | — |
| Warranty | 2 years warranty provided by the manufacturer from date of purchase | 10 years warranty provided by the manufacturer from date of purchase | 1 Year | — |
Values as each maker states them. “—” means the maker does not state it.
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.