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G
®
PHOTASGARD
The light intensity sensor ⁄ twilight sensor PHOTASGARD
switchable measuring ranges (three devices in one) measures the luminous
intensity and is used to control luminaries, lighting systems, Venetian blinds
and canvas blinds, etc., to monitor lighting conditions at workplaces, in green-
houses, storage halls, workshops, corridors, in outdoor areas, in industrial
halls, in offices as well as in residential and business facilities, for daylight-de-
pendant constant light control, as light intensity or twilight sensor and to
control sunshade equipment avoiding unnecessary heating-up of rooms.
Therefore it minimizes your variety of types and stockkeeping while covering a
greater range of universal applications. The sensor used in PHOTASGARD
light intensity sensors was specifically adapted to the sensitivity of the human
eye. Its greatest sensitivity is in the range of 350 nm to 820 nm. Therefore
with its special filter the sensor is predestined for exposure measurement
of daylight and ⁄ or for measuring artificial light of high colour temperature
(similar to sunlight). The case of the sensor is hermetically tight, the vision
panel is protected by a glass plate.
TECHNICAL DATA:
Power supply: .............................. 24 V AC ⁄ DC,
Sensor: ......................................... photodiode with glass case
Measuring ranges: ..................... 0...500 Lux ⁄ 20 kLux ⁄ 60 kLux,
Output: ......................................... 4...20 mA (active) or
Ambient temperature: .............. - 10...+ 50 °C
Electrical connection: ................ 0.14 - 1.5 mm²,
Measuring error: ........................ < ± 10 % of final value
Temperature drift: ..................... < ± 5 % of final value ⁄ 10 K
Enclosure: .................................... plastic, material polyamide,
Dimensions: ................................. 72 x 64 x 39.4 mm
Installation: .................................. on-wall
Cable gland: ................................. M16, including strain relief
Protection class: ........................ III (according to EN 60 730)
Protection type:.......................... IP 65 (according to EN 60 529)
Standards: ................................... CE conformity,
Type ⁄ WG1
AHKF - 0.5 ⁄ 1 ⁄ 20 I
AHKF - 0.5 ⁄ 1 ⁄ 20 U
Optional:
AHKF
current consumption max. 10 mA at 24 V DC
multi-range switching (via jumpers)
see schematic diagram
(other individual ranges optional,
arbitrarily selectable, e. g. 100 kLux)
0 -10 V (linearised)
via terminal screws on circuit board
30 % glass-globe-reinforced,
with quick-locking screws,
colour pure white (similar RAL 9010)
electromagnetic compatibility
according to EN 61 326 + A1 + A2,
EMC directive 2004 ⁄ 108 ⁄ EC
Measuring Range
Light Intensity (selectable)
0...500 Lux ⁄ 20 kLux ⁄ 60 kLux
0...500 Lux ⁄ 20 kLux ⁄ 60 kLux
Other individual measuring ranges
®
AHKF with three
Schematic diagram
®
GND-terminals (1) and (3)
are connected on the circuit board.
Connecting diagram
Connecting diagram
Factory setting 20 kLux
1 2 3 4
1
UB- GND
2
UB+ supply voltage 24V AC/DC
3
GND
4
Output light intensity 4-20mA (linearised)
1
UB- GND
2
UB+ supply voltage 24V AC/DC
3
GND
4
Output light intensity 0-10V (linearised)
Output
Light Intensity
4 ... 20 mA
(linearised)
0 - 10 V
(linearised)
AHKF
0.5 kLux
20 kLux
60 kLux
AHKF - I
AHKF - U
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