LGHW-3020 Hard Wired PIR Detector Installation Handbook
Page 4.
WIRING.
Remove the front of the detector by removing the two M5 screws using the hex key pro-
vided. Inside the front section you will see the circuit board as shown. The terminal
block may be un-plugged for convenience.
Pass the cable(s) through the cable gland(s) in the rear section of the detector and con-
nect as follows.
12 volts DC power to
+
-
Tamper to
TMPR.
May be set as N/C or N/O
Alarm to
ALRM.
May be set as N/C or N/O
Now set the switches as described on page 6, plug the terminal block back into the circuit
board, close the product and screw it back together with the two M5 screws.
MODE
SUB SITE
UNIT PLS
Switch settings. Do not use the left hand switch bank marked FUNCTIONS.
The middle group of switches 1 & 2 are used to select normally open (N/O) or normally
closed (N/C) contacts.
Switches 3 & 4 select how long the contacts stay changed for and switches 7 & 8 set the
number of pulses that the detector needs to count before activating the alarm relay.
Typically the contacts are both N/C and set to 1 second.
Pulse counting.
1 Pulse count is the most sensitive setting and is used to detect fast moving objects such
as motor vehicles. For detecting people a setting of 2 or 3 is common. Pulse count 4 is
much less sensitive and the target must cross many zones before an activation.
For challenging environments such as building sites where loose materials flap about or
car compounds where there are many reflective surfaces it is recommended that AND
detection is used by selecting switch 2 on the MODE switch bank. This requires that the
target crosses both A and B zones to get an alarm. See lens pattern on page 3. Lower
sensitivity can be set using switch 1 but should not be used with high levels of pulse
counting.
Light calibration and restore defaults are special features and covered in other docu-
ments.
+
-
TMPR
ALRM
Terminals
Tamper actuator
Switches
