DND MUR with interlocking switch

By means of mechanical interlocking, when DND switch is pressed, MUR switch shall be release. and vice versa.

Features:

• "Do not disturb" and "Make-up room" switches which is installed inside hotel guest room.
• Only one switch can be turned "on" at a time. Both of switches can be turned "off"
• There are built-in LED with the switches
  RED LED - "Do Not Disturb" switch
  GREEN LED - "Make-up room" switch
• It can work together with "Do Not Disturb" and "Make-up room" indicator to form a complete circuit.
  *When "Do Not Disturb" switch is pressed, the door bell shall be disabled.

Applicable products

Range	2Gang 2Way Switch	DND, MUR indicator	current rating
Radiance	K2772L-2	K2C-DMB	16AX

wiring diagram

demo

faq

• Why LED is ON or blinking even the switch has not been pressed?
  It is due to noisy pickup on the wire.
  To solve the issue can install a capacitors (275V 0.15uF X2) across the LED leads.