Datasheet
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PHOTASGARD
®
AHKF
Rev. 2017 - V11 GB
Outdoor light intensity sensors ⁄ twilight sensors
with multi-range switching
and active output
AHKF
PHOTASGARD
®
AHKF
– Outdoor light intensity sensors ⁄ twilight sensors
Type ⁄ WG01 Measuring Range
Light Intensity (adjustable)
Output
Light Intensity
Item No. Price
AHKF
AHKF-I 0...500 Lux / 1 / 2 / 5 / 20 / 60 kLux
4 ... 20 mA
(linearised) 1601-1112-1000-000
81,60 €
AHKF-U 0...500 Lux / 1 / 2 / 5 / 20 / 60 kLux
0 – 10 V
(linearised) 1601-1111-1000-000
81,60 €
Extra charge: Other individual measuring ranges optional, e. g. 100 kLux on request
Dimensional drawing
AHKF
The light intensity sensor ⁄ twilight sensor
PHOTASGARD
®
AHKF
with six switchable measuring
ranges (six 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 greenhouses, storage halls, workshops, corridors, in outdoor areas,
in industrial
halls, in offices as well as in residential and business facilities, for daylight-dependant 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 stock keeping
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. With its special filter, the sensor is therefore
ideally suited for measuring exposure to daylight and ⁄ or for measuring artificial light of high
colour temperature (similar to sunlight).
TECHNICAL DATA
Power supply: 24 V AC (± 20 %); 15...36 V DC for U variant
15...36 V DC for I variant, depending on working resistance,
residual ripple stabilised ± 0.3 V
Working resistance: R
a
(ohm) = (U
b
-14 V) ⁄ 0.02 A for I variant
Load resistance: R
L
> 5 kOhm for U variant
Power consumption: < 1 W at 24 V DC; < 2 VA at 24 V AC
Sensor: light sensor (see beginning of this chapter)
Measuring ranges:
multi-range switching
(via DIP switches)
with 6 switchable measuring ranges
0...500 Lux ⁄ 1 kLux ⁄ 2 kLux ⁄ 5 kLux ⁄ 20 kLux ⁄ 60 kLux
(other individual ranges optional, e. g. 100 kLux)
Output: 4...20 mA or 0 -10 V
(linearised, active, 2- or 3-wire connection)
Measuring error: < 5 % of final value
Ambient temperature: –30...+70 °C
Electrical connection: 0.14 - 1.5 mm², via terminal screws on circuit board
Enclosure: plastic, material polyamide, 30 % glass-globe-reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016),
enclosure cover is transparent!
Dimensions: 72 x 64 x 43.3 mm (Tyr 1)
Cable gland: M 16 x 1.5 , including strain relief, exchangeable,
max. inner diameter 10.4 mm
Installation: on-wall
Protection class: III (according to EN 60 730)
Protection type: IP 65 (according to EN 60 529)
Standards: CE conformity, electromagnetic compatibility according to
EN 61 326, EMC directive 2014 ⁄ 30 ⁄ EU
Schematic diagram
AHKF
Connecting diagram
AHKF - U
Connecting diagram
AHKF - I
1 2 3
min. max.
offset
1234
ON
UB+ 24V AC/DC
Output Light Intensity in lux
UB- GND
1
2
3
UB- GND
UB+ supply voltage 24V AC/DC
Output light intensity 0-10V (linearised)
1
2
UB+ supply voltage 24V AC/DC
Output light intensity 4...20mA (linearised)
Measuring ranges
(selectable)
DIP
1
DIP
2
DIP
3
DIP
4
0...500 Lux OFF OFF OFF –
0... 1 kLux
O N
OFF OFF –
0... 2 kLux OFF
O N
OFF –
0... 5 kLux
O N O N
OFF –
0... 20 kLux OFF OFF
O N
–
0... 60 kLux
O N
OFF
O N
–