User Manual

5-2 Passive Infrared Reader (PIR) LC 1200 Manual
Positioning
Position the PIR to have the best coverage
possible for your situation.
Accutech recommends ceiling mounting the PIR
(
Figure 5.2) to assure complete and focused
coverage of the opening.
Wall mounting the PIR may result in detection
beyond the desired area (
Figure 5.3). If you
decide to wall mount the PIR, “mask” the PIR to
reduce the range.
While positioning the PIR, keep in mind:
 The more precisely you place and focus
the PIR, the less likely you are to get a
nuisance alarm on a simple pass-by
instead of a true egress.
 The maximum coverage area of a PIR
wall-to-wall curtain is 50’L x 60’W.
 The PIR must be must be pointed at an
object (e.g., the floor) to be able to
detect.
 Do not point the PIR at reflective
surfaces such as mirrors or windows as
this may distort the coverage pattern or
reflect sunlight directly into the PIR.
 When mounting a PIR close to an
elevator, you can avoid nuisance
detection by locating the PIR at an
adequate distance away from the
elevator doors. The movement of air
caused by an operating elevator can
cause nuisance PIR detection.
Figure 5.2 Ceiling-mounted PIR
Figure 5.3 Wall-mounted PIR
Mounting
To mount the PIR, refer to Figure 5.1 and use
the following instructions:
1. Push in the tab at the bottom of the case
and pull the cover straight out at the
bottom.
2. Loosen the PCB screw and push the
board up as far as it will go.
3. Using a small screwdriver, remove the
appropriate knockouts for the mounting
screws.
4. Remove the left and/or right wiring
entrance knockouts located at the top of
the backplate.