 4278EX/4278EX-SN
Multiplex Quad AP Mirror PIR  
 40' x 50' coverage 
Built-in Remote Point Module with DIP switch
addressing (4278EX) or serial number addressing (4278EX-SN)
Alternate Polarity Quad processing for improved
false alarm immunity
Horizontal adjustment for flexibility
Long range mirror included
Extremely low current
Tamper
6 year over-the-counter warranty
The ASC Edge:
Multiplex Sensor Sensibility
It makes sense to use Ademco's smart motion detectors for multiplex systems. Not only
are they smarter than ever, but they provide the opportunity to reduce your overall
installation costs! Whether it's a commercial or residential installation, these sensors
offer you the following benefits:
Point ID identifies the exact location of
the intruder with either a DIP Switch Address (4278EX) or a Serial Number Address as
distinctive as fingerprint (4278EX-SN). And with the built-in Remote Point Module, the
cost is less than a separate module and sensor.
Ademco's patented Global Polling technology
senses alarms up to 8 times faster than conventional multiplex.
Ademco's unique 2-wire multiplex reduces
installation costs over conventional 4-wire hardwire and multiplex approaches:
-- Wire cost is reduced and less than half the number of connections are necessary
-- No more need to home run wiring
-- Each sensor draws super low current, reducing power & battery requirements on large
installations while allowing for longer wire runs or smaller gauge wire
4278EX/4278EX-SN Specifications:
| Detection Method |
Passive infrared |
| Coverage |
40' x 50' (12.2m x 15.2m) (wide angle mirror)
80' x 7.5' (24.4m x 2.3m) (long range/curtain mirror) |
| Detection Pattern |
12 zones (7 main, 4 intermediate, 1 downward (wide angle mirror)
1 zone, 7 tiers (long range/curtain mirror) |
| Pulse Count |
Signal processing/instant response (installer selectable) |
| Detectable Walk Rate |
0.5-5 ft/sec (.15-1.5m/sec) |
| Mounting |
7' (2.1m), nominal |
| Indicators |
Red LED with enable/disable |
| Input Voltage |
8-11V peak to peak at polling loop terminals |
| Current |
Less than 1 mA (LED) inactive, 9 mA approx. (LED active) |
| Operating Temp |
32º to 122ºF (0º to 50ºC) |
| Operating Humidity |
Up to 95% RH (max.), non-condensing |
| Dimensions |
31/4" W x 45/8" H x 2" D
(85mm x 120mm x 50mm) |
Accessories:
1877SM: Swivel mount kit
1878MK-2: Recess mount kit
1878RP-2: Replacement case
How to Order:
4278EX--Alternate Polarity Quad PIR Motion Detector for DIP Switch
Addressable Polling Loops. Includes wide angle and curtain mirrors, mounting plate, mirror
masking labels, and cable clamp kit
4278EX-SN--Alternate Polarity Quad PIR Motion Detector for Serial Number
Addressable Polling Loops. Includes wide angle and curtain mirrors, mounting plate, mirror
masking labels, and cable clamp kit
1877SM--Swivel mount kit
1878MK-2--Recess mount kit
1878RP-2--Replacement case
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