Zone Wiring Methods

[Secware_Tech6]

Attached is a wiring diagram for 'Double Pole', 'EOL' and using a Risco Guardtec CPX 'Zone Doubling'

 

Conventional Double pole requires a pair for each part of the detection device, ie 'Alarm' and 'Tamper'. Wiring the Tamper Circuit as double pole will require a global tamper, this means that all devices with tamper protection are wired in series into the tamper connections of the control panel. Zone wiring is then wired normally straight into the relevant zone connection. This has the advantage of being simpler to understand, but has the disadvantage of a global tamper, ie being able to identify the device in tamper is impossible. Lower end panels only offer Double Pole as a wiring configuration. More advanced panels offer EOL wiring. This utilises a minimum of 2 resistors at the End Of the Line, ie the detector. Using detectors with built in resistors simplifies commissioning as the resistors are built into the sensor. This option is now available with the higher end door contacts. The resistor values vary from manufacturer to manufacturer. For example Honeywell use a 1k - 1k set, whereas Risco / gardtec use a 4K7 - 6K8 set. Other manufacturers use other values. Some panels allow the programming of the values, to facilitate takeovers etc, ie the Galaxy 2-20 / 2-44 allow the programming of any value from 1k to 9.9k. Some panels also offer zone doubling. This allows 2 detectors to be connected to a zone and still receive individual indication of the detector alarm. EOL also offers individual tamper identification allowing for easier fault finding.