Access control applications   
3.16  EST3 Installation and Service Manual 
Common door access 
Description of the application 
A site that makes use of a common door is shown in Figure 3-4. 
Here, the door is the main entrance of an office building, and 
leads into a common lobby area. Within the building, two 
companies rent offices, each with controlled access doors. 
Power supply
Other factors
Hardware configuration
SDU programming
ACDB/KDC operation
X
X
X
CR 1
Control panel
CRC 1
C
R
 
3
C
R
C
 
3
C
R
 
2
CDB
C
R
C
 
2
Modem
CDB
Modem
3-SAC
3-MODCOM
ACDB
Modem
SDU
RPM
Site 
Owner
Company 
A
Company 
B
Distributor
Site owner
SITE
Company A
Company B
Lobby
Common door
SAC bus
Resource profiles
Telephone lines
Suite 101
Suite 102
 
Figure 3-4: Common door in a lobby area