Access control applications
3.2 EST3 Installation and Service Manual
Access control equipment
Introduction
The equipment required for a basic networked access control
system is shown in Figure 3-1. We’ll discuss each item shown in
the figure, plus the other factors called out on the drawing.
Central
monitoring
station
Telephone lines
Control panel
SAC bus
ACDB program
3-SAC
Security Access Control
Module
3-MODCOM
Modem Communication
Module
CRC
Card Reader
Controller
Distributor
SDU
Resource
profile
LockCard reader
Input circuit 1 Input circuit 2
Power supply
Other factors
Hardware configuration
SDU programming
ACDB/KDC operation
X
X
X
X
RPM
Output circuit
Figure 3-1: Equipment required for a basic access control system
Equipment
Here is a list of the equipment used in a basic networked access
control system:
• 3-SAC Security Access Control module
• 3-MODCOM Modem Communication module
• SAC bus
• CRC Card Reader Controller
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