Security applications   
2.2  EST3 Installation and Service Manual 
Security equipment 
Introduction 
The equipment required for a general security system is shown in 
Figure 2-1. We’ll discuss each item shown in the drawing, plus 
the other factors called out on the drawing. 
Central 
monitoring 
station
Telephone lines
Control panel
Signature Controller 
Module
Power supply
Other factors
Hardware configuration
SDU programming
ACDB/KDC operation
X
X
X
X
SAC bus
Signature data circuit
KDC program
SEC2
Security Loop 
Module
3-SAC
Security Access Control 
Module
3-MODCOM
Modem Communication 
Module
MD
Motion Detector
Signature fire 
alarm 
devices
KPDISP
Keypad Display
Conventional 
security devices
Distributor
SDU
RPM
Resource 
profile
 
Figure 2-1: Equipment required for a basic security system 
Equipment 
The equipment used in security applications includes: 
• Control panel 
•  Signature Controller module 
•  SIGA-MD Motion Detector module 
•  SIGA-SEC2 Security Loop module 
•  3-SAC Security Access module 
• SAC bus