Access control applications
EST3 Installation and Service Manual 3.19
CRC
Card
reader
inside
Power supply
Other factors
Hardware configuration
SDU programming
ACDB/KDC operation
X
X
X
CRCSND
Door
contact
Card
reader
outside
Maglock
REX
switch
Figure 3-5: Delayed egress doorway
Hardware configuration
A maglock is most commonly used for delayed egress
applications, but you can use any locking device that has no
manual override. For example, a strike with no knob could be
used.
The door contact is used to detect unauthorized opening of the
door. The CRC activates the CRCSND and reports a security
alarm event when the door is opened without badging or use of
the REX.
The door contact signal is also required to relock the door when
the CRC is reset. The lock cannot be reset until the door is
closed.
SDU programming
Most codes require you to program rules that unlock the door
when the panel goes into alarm or when the panel goes into
trouble.
When configuring the CRC, set the Delayed Egress Time field to
the value (in seconds) you want to use. Define the input loops as
follows.
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