UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
CHAPTER 5
INTRUSION DETECTION SYSTEM
5-1
OVERVIEW
5-1.1
The function of an IDS is to detect intruders. The detection of an intruder
starts the "clock" on the Detect, Delay, Respond timeline addressed in Chapter Two,
Electronic Security Systems Overview. The principal elements of an IDS include interior
sensors, exterior sensors, IDS CPU or local controllers, communications and interfaces
with ACS, CCTV and the Dispatch Center. These elements, and others that comprise
an IDS, are shown in Figure 5-1 (shown on next page). An IDS requires integration with
a process and mechanisms and for assessing and responding to intrusion alarms.
5-2
CENTRAL PROCESSING UNIT (CPU)
5-2.1
The key for any IDS is that it be accurate, timely, and allow for assessment
and verification of alarm conditions. Therefore, it is important that the CPU allow for
integration to the ACS, CCTV system and provide a user interface to allow security
personnel to interact with alarm events.
5-2.2
On a comprehensive system, the CPU of the IDS may include a computer
workstation and printer. The CPU analyzes alarm information from the sensors, and
provides output information to the ACS, CCTV system and computer workstation. The
IDS CPU and the ACS CPU may be integrated into a single controller. This typically
occurs when the IDS inputs are principally simple digital inputs. When more complex
sensors (typically exterior sensors) are used, either local controllers or a separate IDS
CPU will be required as shown in Figure 5-2.
5-2.3
A specialized case of an IDS CPU occurs in a SCIF. In this situation, the
Premise Control Unit (PCU) receives signals from all associated sensors in the SCIF's
alarm zone and establishes the alarm status. The alarm status is immediately
transmitted to the Monitoring Station. Within the Monitoring Station, a dedicated alarm-
monitoring panel (or central processor) monitors incoming PCU signals. On receiving
an alarm signal, a Monitoring Station's enunciator generates an audible and visual
alarm for the monitoring personnel.
5-3
INTERIOR SENSORS
5-3.1
This section covers both interior point sensors and interior volumetric
sensors. For additional information on interior IDS sensors to include types, purposes,
principles of operation, common causes of false alarms, and appropriate applications
refer to DoD 0-2000.12.H.
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