Siemens ET 790 Series Informações Técnicas descarregar pdf (Página 114)

Devices for Special Applications

Sun Protection, Anti-Glare Protection, Utilization of Daylight

Central weather/sun protection systems

6/8

Siemens ET G1 · 10/2008

■

Technical specifications

Type

AP 257/21 AP 257/31 AP 257/01 AP 257/11

Integrated sensors

• Heated wind sensors with no mechanical

components (0 … 70 m/s)

• Brightness sensors (0 … 99.000 lux)

• Dusk sensors (0 … 1000 lux)

• Outdoor temperature sensors (-40 … +80 °C)

• Heated precipitation monitors

Connection of up to

8 external sensors

• 1 wind sensor

(wind rotor monitoring)

• 7 analog sensors

Connection of up to

4 external sensors

• 1 wind sensor

(wind rotor monitoring)

• 3 analog sensors

Receivers for DCF77 signal

✔

-- --

Transmission of all measured values over bus

✔ ✔ ✔ ✔

Functions

Monitoring of all measured values up to

3 limit values

✔ ✔

-- --

Sensor monitoring

✔ ✔

-- --

Sunlight tracking control

✔

-- -- --

Shadow edge tracking

✔

-- -- --

Integrated shutter/blind control modules

✔

-- --

• Controllable facades 8 4 -- --

AND operations

4 4 -- --

OR operations

4 4 -- --

8 OR operations for alarm/fault indications

✔ ✔

-- --

Locking function for window cleaning tasks

✔ ✔

Safety/alarm objects

✔ ✔

Light/time function -- --

✔ ✔

Enclosure data

Design AP AP AP AP

Degree of protection

IP44 IP44 IP54 IP54

Dimensions

•Height mm 69 69 160 160

•Width mm

67 67 250 250

•Depth mm

118 118 55 55

Display/control elements

LED for the display of DCF77 reception

✔ ✔

-- --

Power supply

Electronics powered over an external power

supply unit

24 V DC

-- --

With electronics powered over an integrated

power supply unit. Supply voltage 230 V AC

-- --

✔ ✔

Bus connection

Integrated bus coupling units

✔ ✔ ✔ ✔

Bus connection via bus terminal

✔ ✔ ✔ ✔

External 4AC2 402 power supply unit.

For selection and ordering data, see page 6/9.

Type Description

Accessories for AP 257/21, AP 257/31 weather systems

Electronic power supply units

• For powering the AP 257/21 and AP 257/31 weather systems

with 24 V DC over the white/yellow core pair of the bus cable

• Max. cable length between power supply unit and weather

system: 100 m

• Rated operational voltage 85 ... 265 V AC (50/60 Hz),

85 ... 300 V DC

• Rated secondary voltage 24 V DC, +5 %

• Residual ripple < 100 mV

• Rated secondary current 0.35 A

• Electronic overload protection

• Permissible ambient operating temperature: - 20 ... +60 °C

• Degree of protection IP20

• For mounting on EN 60715-TH35-7.5 mounting rail

• Width: 2 MW (1 MW = 18 mm)

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