System Elements

The PERIDECT system consists of an evaluation unit (PVJ), to which detection sensors (PDS) and input/output modules (PIO), are connected using a data cable. Each PVJ can be connected to up to 246 detection sensors (PDS) and 8 input/output modules (PIO).

PVJ – Evaluation Unit

The evaluation unit is located in a plastic box with cable grommets. The unit is connected to individual detection sensors (PDS) and input/output modules (PIO) using a data cable (twin-wire bus-bar). The unit contains 10 programmable outputs. These can be connected to a conventional security panel with the result that activation from any groups of PDS’s or the input status of any PIO module can be assigned to any output. The evaluation unit contains in addition eight double balanced inputs, which can be used for connection of other security system elements, e.g. PIR’s, IR beams, MW detectors and contacts.

PDS – Detection Sensor

The detection sensor evaluates mechanical vibrations from the fencing using a piezoelectric sensor (ensuring long-term durability and repeatability). It is located in a plastic box and attached to the fencing by four screws and a plastic strap. It is fi tted as standard in the middle of the fence panel between the post supports. The manufacturer connects individual sensors using a bus cable with spacing according to actual conditions that the installer must specify. It is recommended to fi x these cables every 25 cm using cable ties, so that these cables cannot interfere with the fencing in windy weather conditions causing false alarms.

PIO – Input/output Module

Each input/output module has been designed to allow one input to be connected (e.g. contacts) into the system and for one output to be connected (e.g. switching on devices on the perimeter route). The input is double balanced and the output is an open collector type with galvanic separation. The module has its own address and can be connected anywhere to the data cable. For example this PIO module can monitor door opening on the secured route by connecting a magnetic contact. The output may for example switch on the lighting or a sounder remotely. In such case, it is however necessary to provide a local power supply for that device.