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Devices for Special Applications

Lighting

Switch/dimming actuators

5/12

Siemens ET G1 · 10/2008

Type Description

AP 255

UP 255

AP 255, UP 255 indoor brightness sensors

For N 526/02 switch/dimming actuators

• For measuring the brightness on an illuminated area through

measurement of the reflected light

• Measuring range: 0 ... 1500 lux (with a reflectance of the

illuminated area of approx. 30 %)

• For direct connection to N 526/02 switch/dimming

actuators over a 3-wired cable of up to 100 m in length,

which also serves to power the sensor electronics

• Plug-in low-voltage terminal for connection of the cable to

N526/02

• Including two rigid optical fiber rods:

- Parallel light-sensitive surface for mounting surface

- Inclined (45°) light-sensitive surface for mounting surface

UP 255 indoor brightness sensors

• For mounting in a hollow-wall or flush-mounting box

with

∅

58 mm and min. 40 mm mounting depth

• Cover made of white plastic (polystyrene)

• Dimensions (H x W x D): 30 x 52 x 33 mm

AP 255 indoor brightness sensors

• For ceiling or wall mounting

• Includes surface-mounting enclosure made of white plastic

(polypropylene) with

∅

70 mm and 24 mm in height

• Dimensions (H x W x D): 30 x 72 x 33 mm

For selection and ordering data, see page 5/13.

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Siemens ET 790 Series Technical Information Seite 100