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instabus EIB

Technical Product Information

December 2007

Dual Sensor for Brightness and Temperature 5WG1 254-3EY02

AP 254/02

Siemens AG AP 254/02, 6 pages Technical Manual

Automation and Drives Group

Electrical Installation Technology © Siemens AG 2007 Update: http://www.siemens.de/installationstechnik

P.O. Box 10 09 53, D-93009 Regensburg Subject to change without prior notice

2.13.2.11/1

Product and Applications Description

Functional description

The Dual Sensor AP 254/02 provides ambient light level

and outdoor temperature values. These values can be

sent onto the bus.

The device offers four universal channels (A, B, D, E)

and one solar protection channel C, which evaluate light

level and temperature for their configured function.

Each universal channel alternatively provides the follow-

ing threshold switches for control of switching, dimming,

and solar protection actuators based on ambient light

level and/or temperature:

• threshold switch for light level

• threshold switch for temperature

• threshold switch for light level and temperature com-

bined

Dependent on whether the threshold condition is met or

not met a corresponding telegram is sent onto the bus

via the associated channel object. Additionally, a second

object can be activated as required to send a second

telegram.

Each universal channel can be deactivated by an asso-

ciated blocking object. For each universal channel if a

light level threshold is applied it may be set to the current

light level via an associated learning object.

Additionally, the device provides a solar protection

channel C for automatic control of solar protection equip-

ment. The automatic control can be started and stopped

via an object (sun control) or via a dusk/dawn ambient

light level threshold. Up to three light level thresholds

control the position (height and angle of slats) of the so-

lar protection blinds.

The light level thresholds may be set by sending a bus

telegram to an associated learning object. The solar pro-

tection channel can be deactivated by an associated

blocking object.

Function for blinds

When threshold 1 is exceeded the blind is moved down

via the first object (height) and the slats are moved into a

first position via the second object.

When threshold 2 is exceeded the slats are moved into a

second position. The height remains the same.

When threshold 3 is exceeded the slats are moved into a

third position. The height remains the same.

When the light level falls below any threshold the blind is

moved into the previous position and/or height. When

the light level falls below threshold level 1 the blind is

moved up.

Function for shutters / textile solar protection

When threshold 1 is exceeded the shutter is moved

down into a first position via the object “height”.

When threshold 2 is exceeded the shutter is moved

down into a second position via the object “height”.

When threshold 3 is exceeded the shutter is moved

down into a third position via the object “height”.

When the light level falls below any threshold the blind is

moved to the previous height. When the light level falls

below threshold level 1 the blind is moved up.

While automatically controlling solar protection equip-

ment fast changing sunshine conditions can lead to fre-

quent up and down movements of the solar protection

equipment. To avoid frequent up and down movement of

the solar protection the parameter “Reaction to sun con-

trol ON” can be set to “move up & sun control once”. The

behaviour of the blinds and shutters changes as follows.

Function for blinds (singular automatic sun control)

When threshold 1 is exceeded the blind is moved down

via the first object (height) and the slats are moved into a

first position via the second object. The blind stays at

this height all day long. The blind is moved only at dusk

or via the object for automatic sun control. Only the slats

are adjusted dependent on the current light level.

When threshold 2 is exceeded the slats are moved into a

second position. The height remains the same.

When threshold 3 is exceeded the slats are moved into a

third position. The height remains the same.

When the light level falls below any threshold the slats

are moved into the previous position.

Function for shutters / textile solar protection (singular

automatic sun control):

When threshold 1 is exceeded the shutter is moved

down via the object (height).

When threshold 2 is exceeded the shutter is moved into

a second position via the object (height).

When threshold 3 is exceeded the shutter is moved into

a third position via the object (height).

Summary of content (6 pages)

PAGE 1
instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG1 254-3EY02 tection channel can be deactivated by an associated blocking object. Product and Applications Description Functional description The Dual Sensor AP 254/02 provides ambient light level and outdoor temperature values. These values can be sent onto the bus.
PAGE 2
instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG1 254-3EY02 When the light level falls below any threshold no telegram is sent. The brighter it gets the further down the shutter is moved. It is only moved up at dusk or when the automatic sun control is turned off. All other movements of the shutters are initiated by the user.
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instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG 254-3EY02 Application programs Technical Specifications 21 S2 Brightness and Temperature 909712 − Send temperature value / brightness value cyclically and / or on change − Each threshold can be set separately − Closed loop control of illumination light level to a preset value − Up to four shading systems can be controlled based on combined temperature and light level values − Automatic sola
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instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG1 254-3EY02 Environmental specifications • Ambient temperature operating: -25°C ... +55°C • Climatic conditions: EN 50090-2-2 • Ambient temperature non-operating: - 25°C ... +70° C • rel.
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instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG 254-3EY02 Operator Elements Mounting and maintenance of the protective cap Mounting the protective cap • Place the protective cap over the installed device • Lock the cap by tightening the screw. Maintenance of the protective cap • Clean the protective cap regularly to avoid false readings of the light level due to dust and grime. • Use a damp cloth.
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instabus EIB Technical Product Information December 2007 Dual Sensor for Brightness and Temperature AP 254/02 5WG1 254-3EY02 General Notes • The operating instructions must be handed over to the client. • Any faulty device should be returned to the local Siemens office. • If you have further questions concerning the product please contact our technical support. ! +49 (180) 5050-222 ! +49 (180) 5050-223 " www.siemens.com/automation/support-request Technical Manual Update: http://www.siemens.