Access control applications
EST3 Installation and Service Manual 3.45
Remote controls
Description of the application
In any access control system, a card reader and CRC can be used
to operate devices that are completely remote from the CRC. In
such cases the CRC simply creates an access event and passes it
to the 3-SAC for processing by the CPU. Any device that can be
controlled by an EST3 panel can be operated in response to an
access event.
As a typical example, Figure 3-18 shows how the entrance
devices to a secured parking area could be operated from a
remote card reader. Note that any type of CRC input device
could be used in place of a card reader.
Control panel
3-SAC
Signature
controller
CPU
Signature
relay
Command lists
Gate opener
VCR
Spotlight
CRC
Card
reader
CRCXF
SAC bus
Signature data circuit
Power supply
Hardware configuration
SDU programming
ACDB/KDC operation
Other factors
X
X
Signature
relay
Signature
relay
Figure 3-18: Remote control of a parking garage entrance
When the cardholder badges in, the access event is sent from the
CRC to the 3-SAC and then to the CPU. At the CPU, the access
event activates a predefined command list.