Edwards Signaling SD4WJ

The EDWARDS-SIGNALING-SD4WJ is a 4-wire duct smoke detector with photoeletric type that features environmental compensation with differential sensing, which enables the unit to be immune from sensitivity drift a common cause of false alarms.

Every eight minutes the SD4WJ checks its environment for dirt, humidity other conditions that normally interfere with sensor operation, and automatically adjusts its sensitivity to compensate. The unit can be tested for dirt contamination remotely, eliminating the need to physically access the detector with a sensitivity tester.

The SD4WJ's snap-in RJ45 connectors reduce time spent on controller/detector interconnection to just a few seconds, while sampling tube spacing - and even field wiring connections - match standard configurations.

UPC: 0793016035776
Also known as: ED-SD4WJ

Technical Specifications: Operating Voltages: 24 VDC, 24 V at 50/60 Hz, 120 V at 50/60 Hz, 220/240 V at 50/60 Hz Auxiliary Output: 18 VDC, nom., 30 mA, max. Alarm Initiation Relay: Quantity - 1 Style - Normally Open Ratings: 2.0 A at 30 VDC (resistive) Alarm Test Response Time: 5 to 7 seconds Power Up Time: 8 seconds, max. Reset Time: 2 seconds, max. Sensitivity: 0.67 to 2.46 %obscuration/ft Air Pressure Differential: 0.005 to 1.00 inches of water Air Velocity Rating: 100 to 4,000 ft/min and meets the required minimum air pressure differential Smoke Detection Method: Photoelectric Wire Size: High voltage power input terminals (L&N): #12 to #22 AWG All others: #14 to #22 AWG Controller with Sensor Dimensions: 14.51” x 5.45” x 1.90” (36.86 cm x 13.84 cm x 4.83 cm) Sensor Dimensions: 8.70” x 5.45” x 1.90” (22.10 cm x 13.84 cm x 4.83 cm) Controller Dimensions: 6.75” x 5.45” x 1.90” inches (17.15 cm x 13.84 cm x 4.83 cm)

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