System Sensor Wiring Diagram for D4120 to SSK451 with PS24LOW

04 09 Services All Users of System Sensor D4120 FIELD BULLETIN Wiring Diagram for D4120 to SSK451 with PS24LOW Support has uncovered an issue with the D4120 duct smoke detector when used with SSK451 and the PS24LOW the maximum alarm output of the D4120 varies depending on temperature and tolerances the electrical components a 50 mA minimum is guaranteed across the entire environmental temperature However because the PS24LOW has a maximum inrush around 75 mA may trigger the short circuit protection on the D4120 at some operating temperatures addition since its alarm output threshold can change with temperature a D4120 used with the that functions properly at installation may short circuit if the temperature fluctuates In controlled environments near constant temperatures will reduce this occurrence potential solution is to power the SSK451 PS24LOW terminal 1 to the Aux Output 19 through the AUX B relay contacts of 7 and 18 DIAGRAM FOR D4120 TO SSK451 WITH PS24LO you have any questions regarding System Sensor products codes or their application please Technical Support at 1 800 SENSOR2 736 7672 ext 2 Ohio Avenue St Charles Illinois 60174 Phone 800 SENSOR2 Fax 630 377 6583 http www systemsensor com