Each ACS/FSA/PID subsystem consists of a software and a hardware part. The role of the hardware part is performed by the third-party ACS/FSA/PID system integrated into ACFA. The software part of the ACS/FSA/PID subsystem consists of integration modules that provide configuration of interaction between ACFA and a hardware part.

Integration modules of the ACS/FSA/PID hardware perform the following functions:

1. Configuring interaction between ACFA and the ACS/FSA/PID hardware.
2. Processing information from security panels, alarm sensors, sensors, and other notification devices (if the functions of FSA are integrated).
3. Processing information from readers, electromechanical locks, and other access control devices (if the functions of ACS are integrated).
4. Processing information from perimeter intrusion sensors and sensors installed at the entrance to the perimeter-protected facility (if the functions of PID are integrated).
5. Controlling alarm and fire extinguishing actuators (if the functions of FSA are integrated).
6. Controlling actuators—security lighting, access control devices, for example, turnstile, auto barrier (if the functions of PID are integrated).
7. Controlling access actuators—gate locking and unlocking devices (if the functions of ACS are integrated).

8. Reading hardware configuration parameters and sending configuration parameters to the hardware (may not be supported in the integration module. In case of ACS, the configuration includes users, access levels and time schedules).