ADEMCO 4278EX-SN 설치 지침

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페이지 인쇄

No. 4278EX-SN

PASSIVE INFRARED MOTION DETECTOR

INSTALLATION INSTRUCTIONS

GENERAL INFORMATION

The No. 4278EX-SN PIR is a passive infrared motion detector for use with control

panels that support serial number polling loop devices only. It is not for use with pan-

els that support only DIP switch addressing.

The detector provides 12 zones of wide-angle coverage with a range of up to 40 feet

(12.2m) with the supplied mirror, or long range/curtain coverage (with optional long

range mirror) with a range of up to 80 feet (24.4m).

COVERAGE CONSIDERATIONS AND TYPICAL LAYOUTS

The range will depend upon the mirror system in use. Protective patterns are shown in

Diagrams 1 and 2 for a normal mounting height of 7ft (2.1m). The unit may be mount-

ed higher for increased range but mounting above 8.5 ft (2.6m) is not recom-

mended.

ÒDead ZoneÓ Caution: Note in Diagram 1 that a Òdead zoneÓ is indicated, within which

a person could be moving and not be detected by any of the unitÕs protective zones.

Other dead zones may occur between the detector and the downward fields of view as

the unitÕs mounting height is increased.

Selecting a Mounting Location

The detector responds to changes in energy which occur when an intruder moves into

or out of a protective zone. Best coverage will be obtained if the mounting site is select-

ed such that the likely direction of intruder motion is ACROSS the pattern.

Passive I.R. units are remarkably resistant to false alarm hazards, but the following rec-

ommendations should be observed:

¥ Install the detector at a height of approximately 7 feet (2.1m) from floor. Do not mount

on an unstable surface

IMPORTANT! Avoid running alarm wiring close to heavy-duty electrical power

cables

¥ Do not install where the detector is exposed to direct sunlight or directly above strong

sources of heat.

¥ Avoid locating a unit in areas which contain objects likely to produce a rapid change

in temperature, such as central heating, radiators or ducts (or heaters of any kind),

air conditioners, open flame, etc.

¥ Make sure the detection area does not have obstructions (curtains, screens, large

pieces of furniture, plants, etc.) which may block the pattern of coverage.

INSTALLATION

A. Changing from Wide Angle to Long Range coverage:

1. Remove front cover by inserting a screwdriver blade in the groove between cover

and base at one of the locations shown in Diag. 3, rotating the blade to override

snap fit, and then lifting cover off.

2. Spread either or both plastic prongs holding the wide angle [40 ft (12.2m)] mirror

and remove the mirror (Diag. 4).

3. Insert one side of the long range [80 ft (24.4m)] mirror under a prong and snap the

other side under the other prong. Make sure that the mirror sides are squarely in

their corner rests and are held securely under the prongs.

NOTE: Mirror surface should be free of dirt, foreign matter and finger

clean dry soft cloth to wipe mirror surfaces, if required.

B. Mounting with Wall Plate

1. Remove the front cover as shown in Diagram 3.

2. Mount the wall plate to a firm vertical surface (flat on wall or in a corner). See

Diagram 5 and Detail A.

3. Feed wiring through tow access hole of detector but do not connect to terminal

block yet. See Diagram 4, Note A.

4. Attach unit to wall plate by engaging all four hooks on the plate into slots on the

rear of the base and by pressing downward (see Diagram 5).

NOTE: The PIR is locked to the wall plate by a spring tab that engages a small

opening in the housing base (see Diag. 5). The PIR can only be removed by

cover removal, depression of the tab from the inside with a small-blade screw

driver and then sliding the PIR upward (see Diag. 4).

C. Mounting without Wall Plate

Mount the PIR on a flat wall or in a corner, without a wall plate. Two pairs of knock-

out areas are provided on the housing base, just above the mirror, where mounting

screws can penetrate the plastic. These are accessible by removing the circuit

board (spread the circuit board mounting tabs shown in Diagrams 4 and 5).

Do not open the knockout areas unless they will be used for mounting, with the

heads of the mounting screws completely covering the openings.

For flat wall mounting, a wiring passage is provided at the rear of the housing base

to enable circuit wires to be routed into the PIRÕs wire entry area. See Diagram 4,

Note A and Diagram 5, Detail A.

After the base is mounted, the circuit board should be carefully replaced. Align the

notches at the left and right edges of the circuit board with the baseÕs mounting

tabs. In addition, the board should rest securely on the two support posts, and the

wiring entry notch at the boardÕs upper edge should rest on the long wall of the

wiring entry passage. See Diagrams 4 and 5.

N4756–8V1 11/95

TOP VIEW

SIDE VIEW

prints.

Use a

WIRING ENTRY

NOTCH (IN BOARD)

AND PASSAGE

(IN BASE)

PC BOARD

MOUNTING

TABS (2)

SERIAL NUMBER

PC BOARD

SUPPORT

POSTS (2)

PLASTIC PRONG (2)

(HOLD MIRROR

IN PLACE)

DETECTOR

DOWNWARD

APPROX. 4 FT.

(1.2m) DEAD ZONE

Diagram 1: WIDE ANGLE PROTECTION PATTERN

TOP VIEW

10'

40'

(3.0m)

(12.2m)

SIDE VIEW

(2.1m)

2.3'

(0.7m)

Diagram 2: LONG RANGE/CURTAIN MIRROR COVERAG

(With Optional Long Range Mirror)

LIFT

COVER

INSERT SCREWDRIVER

AT LOCATION a, b or c

AND TWIST

Diagram 3: COVER REMOVAL

INSERT SMALL SCREWDRIVER

TO RELEASE WALL PLATE

NOTES:

INTERLOCKING SPRING TAB

A. Thin exterior wall in wiring entry

TERMINAL

BLOCK

B. Hole along upper edge of housing

LED

MIRROR

CORNER

RESTS (4)

MIRROR WIDE ANGLE

HORIZONTAL

ADJUSTABLE

MIRROR

CARRIER

Diagram 4: INTERIOR OF DETECTOR

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INTERMEDIATE

MAIN

7'6"

(2.3m)

80'

(24.4m)

80'

(24.4m)

area can be cut/broken away for

surface wiring.

permits use of cover securing

screw (required for VdS/SKAFOR

compliance) and holes within

wiring entry area permit addition

of wiring clamp (required by VdS).

Keep housing screw hole covered

(with label supplied or tape) if

screw not used.