Variable air volume controllers
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Argus-IR24-P
Presence detector
IR24-P is a presence detector designed for automatic
ventilation control of HVAC systems.
• Power supply 24 V AC or DC
• Intended for wall or ceiling mounting
• Unobtrusive design
• Potentialfree, changeover relay
• Both relay on-delay and/or relay off-delay, can
• be individually set
Function
The IR24-P is a presence detector designed for automatic
ventilation control of HVAC systems. It saves money and
gives higher comfort in premises which require forced
ventilation for shorter periods of time, such as conference
rooms, assembly-halls etc. The unit provides a changeover
relay signal output for start/stop of fan or similar equipment.
It can be wall or corner mounted with 110°, 15m detection
range.
Range adjustments
In order to suit different rooms or areas, the detection range
of IR24-P can be adjusted by changing the direction of the
sensor. To change the sensor direction, release the screw on
the mounting bracket and then carefully move the sensor to
the direction desired.
On / Off Delay
The ON and OFF delays are designed to provide smarter
energy management of HVAC systems. ON delay is the
time given to the sensor to certify the occupancy, before
it activates the output relay. OFF delay is the time that the
relay is activated after the last detection. Both ON and OFF
delays can be easily set by placing the jumper head on the
corresponding pins as following.
Detection pattern
A
B
C
E
E
F
ON 0 sec.
10 sec.
30 sec.
1 min.
5 min 10 min.
OFF 10 sec.
1 min.
5 min.
10 min.
20 min.
30 min.
Technical data
• Infrared sensor Dual element
• Power supply 24 ± 2 V AC/DC
• Detection range 15 x 15 m at 25°C
• Output relay 24 V DC, 0.2 A max.
• Consumption 5 mA @24 V AC
• Mounting height 1.8...3.6 m
• Mounting bracket MB-99
• Detectable speed 0.1...3.0 m/sec.
• RFI immunity Av. 20 V/m (10...1,000 MHz)
• Ambient temperature -20°C...50°C
• Ambient humidity 95% RH max.
• Dimension 112 x 66 x 45 mm
