REDWALL®
MegaRed® 180 Dual Range detector Model LRP 180QH
Installation and Set-up Instructions
(Please keep for future reference)
DESCRIPTION
Model LRP 180QH is designed to detect human movement at ranges of up to 180 metres. The rugged housing
contains two separate detectors. One detector is similar to the popular REDWALL LRP 100Q quad sensor which
has a detection range up to 100 metres. The other detector is also a ‘quad’ sensor system with a long focal
length optical system specifically designed to detect movement at ranges between 80 and 180 metres.
The LRP 180QH is ideal for use with CCTV surveillance systems which have multi-cameras or domes with pan,
tilt and zoom facilities. The two outputs (near and far) may be used to automatically activate camera pan or
zoom controls to precisely locate an intruder over the full detection range. Alternatively, the two outputs may be
used to direct an operator to a specific area of interest or to activate local floodlighting.
The LRP 180QH comprises two units, the detector head and the control unit which contains three relays for ‘near’,
‘far’ and tamper signalling. The control unit may be located remote from the detector head, for instance at a
control/monitoring area, or may be located close to the detector or camera where direct automatic pan or zoom
is used.
Connection between head and control unit is 4-core screen cable which may be up to 1400 metres. (See cable
chart Fig. 6). Alarm signalling between the detector head and the control unit is by means of simple line current
monitoring which is highly immune to radio and electrical interference.
Fig. 1 shows the coverage patterns of the two detectors. At the recommended mounting height of 8 feet (2.5
metres) there will be an area directly below the unit extending some 6 metres where an Passive Infrared
2M
AT 30M AT 100M AT 180M
‘NEAR’ DETECTOR
PLAN VIEW
3M 4M
‘FAR’ DETECTOR
0.5°
‘FAR’ DETECTOR
8FEET
2.5M
‘NEAR’ DETECTOR
Fig. 1
detectors ultimate detection range will vary according to the background temperature and the size, speed
and clothing of the intruder. The LRP 180QH is designed and tested to detect a normally clothed, normal size
adult, moving at slow or medium walking pace across the zones. Variations in size and clothing, background
temperature, speed and direction of motion may result in the ultimate detection range being less (or more) than
180 metres.
Fig. 2 shows the schematic principles of the system. Note that both ‘near’ and ‘far’ systems use dual-channel
signal processing and event-memory circuits which require intruder detection to occur in both channels within a
time period in order to be accepted as an alarm condition.
An alarm condition in either ‘near’ or ‘far’ systems sets the line interface to provide various levels of line current
which are translated into relay activation at the control unit. An open-circuit (zero line current) or removal of the
control unit lid will activate the tamper relay.
QUAD
SENSOR
QUAD
SENSOR
SIGNAL
PROCESSOR
NEAR DETECTOR
SIGNAL
PROCESSOR
SIGNAL
PROCESSOR
FAR DETECTOR
SIGNAL
PROCESSOR
MEGARED HEAD
EVENT
MEMORY
EVENT
MEMORY
EVENT
MEMORY
EVENT
MEMORY
LOGIC
PROCESSOR
LOGIC
PROCESSOR
LINE
INTERFACE
TWO CORE
SIGNAL LINE
MEGARED CONTROLLER
SUPPLY
TAMPER/FAULT
RELAY
NEAR DETECTOR
RELAY
FAR DETECTOR
RELAY
Fig. 2
INSTALLATION
Important: The LRP 180QH contains fragile optical components and must be handled with care. Before
installation, check that the unit is free from damage and that no loose objects are rattling around inside.
When planning the location, remember that all PIR detectors respond best when the intruder crosses the zones.
IF THE GROUND IS NOT LEVEL AND HAS DIPS, INTRUDERS MAY CROSS BELOW THE ZONES WHEN
WALKING IN THESE DIPS AND NOT BE DETECTED. CAREFUL SYSTEM PLANNING IS STRONGLY
RECOMMENDED.
The detector head MUST be securely mounted on a firm vertical surface using all four holes in the wall bracket.
It is recommended that the expansion bolts (supplied) be used when wall mounting. If the detector head or its
mounting surface moves during high winds, false alarms may result. (Even a half degree movement left and
right will mean that the furthest zones will pan over 3 metres.)
The top surface of the head unit should be parallel with the ground. If the ground is level a spirit level may be
used to set the head ready for walk-testing. (See Fig. 3+4)
When fixing the control unit, fix to a vertical surface with the cable glands at the bottom.
RANGE ADJUSTMENT
FAR LED NEAR LED TAMPER LED
Fig. 3 Fig. 4
POWER ON
LED
Fig. 5
LRP 180QH
DETECTOR
MAX. RES. 20 OHMS (10 OHMS PER CONDUCTOR)
Cable
Twin
7/02
16/02
24/02
0.5M
1MM
1.5MM
2.5MM
Max.
Distance
120M
250M
400M
250M
550M
800M
1400M
MR 240
CONTROL
RELAYS
IMPORTANT
IF ALL CABLES ARE AT MAX. PERMITTED RESISTANCE
ENSURE THAT INPUT VOLTAGE AT TERMINALS
IS NOT LESS THAN 11 VOLTS
MAX. RES. 12 OHMS
(6 OHMS PER CONDUCTOR)
12V (NOM)
SUPPLY
(11~16V DC)
Cable
Twin
7/02
16/02
24/02
0.5M
1MM
1.5MM
2.5MM
Max.
Distance
75M
150M
250M
150M
300M
500M
850M
Fig. 6
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