LaserFOCUS VLF-250 Product Guide - Pertronic Industries Ltd

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LaserFOCUS VLF-250 Product Guide VESDA ®The GPI function parameter can be set to the values shown in the table below to achieve severaldifferent functions:GPI functionparameter valueNoneResetDisableStandbyAlarm set 1Alarm set 2ExternalResultGPI is disabled. If GPI will not be used we recommend that youleave the EOL resistor assembled.Detector is reset on activation of the GPI (closing contact).Note: The factory-default value of the GPI function is Reset.Detector is disabled while GPI is active (contact closed) and reseton de-activation of the input (contact open).Detector is placed in standby (disabled, plus aspirator turned off)while GPI is active (contact closed) and reset on de-activation of theinput (contact open).Activation of GPI forces alarm threshold set 1 to be used. Itoverrides normal selection.Activation of GPI forces alarm threshold set 2 to be used. Itoverrides normal selection.Detector indicates a fault while the GPI is active (contact closed).Typically this is used to monitor external power supply units.Note: If the contact is closed it will raise an Instant Fault FinderNo.6 fault. If wire is broken to the monitoring device it will raise anInstant Fault Finder No.8 fault.Table 1 - GPI programmingCDThe GP input detects a short circuit (e.g. the PSU fault relay) at or below 100 Ohms.LegendA End of Line Resistor (2.7k)AB B External device (1 to N)C GPI Pin 1D GPI Pin 2Figure 8 - Triggering of GPI8
VESDA ®LaserFOCUS VLF-250 Product GuideExtra terminals (Terminals 3, 4, 5, 6 & 7)Terminals reserved for future use.Legend3 Display Tx4 Display Rx5 Display Comm Gnd6 Display Power -7 Display Power +Figure 9 - Terminal block display, spare power terminalsPower supply (Terminals 8, 9, 10 & 11)Operating voltage:Power consumption:Current consumption:24 VDC nominal (18 - 30 VDC)5.2 W nominal, 7.0 W in alarm220 mA nominal, 295 mA in alarmIt is recommended that the power supply be compliant with local codes and standards requiredby the regional authority. For code specific information see page ii.Caution:Check the product termination wiring label during installation and subsequentmaintenance visits.Legend8 Power Return 0 VDC From power supply unit9 Power in 24 VDC10 Power Return 0 VDC To next detector (if morethan 1 detector per Power11 Power Out 24 VDC Supply Unit)Figure 10 - Terminal block display, power supply9
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LaserFOCUS VLF-250 Product Guide - Pertronic Industries Ltd

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