Aiphone Dual Master ChimeCom C-123LW Supplemental Instructions page 3

WIRING DIAGRAM: C-123L/A System with External Signaling using RY-AC Relay
C-ML/A with Door Release contact Modified to Normally Closed (for Magnetic Lock)
Magnetic locks require Normally
Closed contacts, keeping power
applied to the magnet to keep the
door locked, and breaking power to
release the door. These instructions
explain how to change the contact in
the C-ML/A to Normally Closed.
1. Remove back chassis of C-ML/A
and move PC-754 aside. Black
door release switch will be visible.
2. On the switch, move* the wire from
the NO contact (middle position) to
the NC contact (top position).
3. This modification will change the
door release button's function to
Normally Closed, to be used with a
magnetic lock device.
4. Switch contact rating is 1A at 50V
AC.
C-123LW Supplen