Access control applications
3.24 EST3 Installation and Service Manual
Emergency exit door
Description of the application
An emergency exit door is a door that is unlocked from the
inside either by badging out or by opening the door.
If the door is opened without badging out, it causes an immediate
alarm. Badging out bypasses the door for a specific period of
time, so no alarm event occurs.
A typical CRC application for emergency exit door is shown in
Figure 3-7 below.
CRC
Card
reader
inside
Power supply
Other factors
Hardware configuration
SDU programming
ACDB/KDC operation
X
X
X
CRCSND
Door
contact
Card
reader
outside
Strike
Figure 3-7: Emergency exit door
Note:
Refer to NFPA 101 and the local AHJ to determine the
requirements for emergency exit applications.
Hardware configuration
A CRC used for an emergency exit door requires the following
additional hardware:
• CRCSND CRC Sounder
• Door contact
The CRCSND is installed inside the CRC. The sounder provides
a local sound alarm. Opening the door without badging out
activates the CRCSND.