Detection Systems
Abacus User Guide
Chapter 4.12
Fire Alarm
Same signal as alarm, but pulsed switched ON for 1 second and OFF for 1 second.
System Detectors
An intruder alarm system is built up of a number of detectors (Many manufactured by other
companies) wired into the Abacus control panel zones; these detectors are selected for the type of
detection required and the environment of the location. Listed below is a number of the more common
type of detectors used.
Door Contacts
A set of magnetic contacts (switches) installed on a door (or window) which will signal to the Abacus
panel when the door (or window) is opened.
Movement Detectors
A security device normally mounted at head height to detect the movement of a person within a given
location (i.e. the lounge). These detectors use one or more technologies such as passive infra red,
microwave or ultrasonic principles.
Vibration Detectors
A small sensitive security detector fitted to a door/window frames etc., to detect vibration caused by
forced entry.
Personnel Attack
A push button type switch, strategically positioned within the premises, when operated regardless of
whether the panel is set or unset will signal a personnel attack alarm (PA) to the central station if a
communicator is fitted. The PA alarm may be silent alarm or a full alarm (bells and sounders) as
programmed by your installation engineer.
Fire Detectors
A fire detector is a device that will operate on detection a fire (i.e. smoke or heat detector). These
devices, when activated, will cause the Abacus panel to give distinct fire alarm signal. This signal is
generated by the panel continually pulsing all sounders and bells (1 second on and 1 second off).
Caution. The Abacus control panel has not been designed to comply with the fire industrial
standards and should not be used when an approved fire panel is recommended or
required. Detection System cannot be held responsible for any failure to comply with
any fire industry requirements, or relevant standards or regulations.
Auxiliary Detectors
The Abacus panel can accept signals to give a warning from other forms of detectors such as a freezer
temperature alarm, flood alert alarm or gas alarm (i.e. Carbon Monoxide), when triggered the system
will give an internal alarm only, and remote signalling, if programmed and communicator fitted.
Warning Devices
The most important function of any alarm system, is to quickly inform that an event has occurred, this
is done in a number of ways.
