GW90770 - Environmental sensor Gewiss - Free user manual and instructions

Product type	Wind sensor interface
Brand	Gewiss
Model	GW90770
Power supply	230 V AC - 50 Hz
Outputs	2 potential-free NO contacts
Protection rating	IP55
Response time	Approximately 15 seconds
Recovery time	Approximately 15 minutes
Wind thresholds	Adjustable from 3 to 10 Beaufort (12 to 88 km/h)
Test mode	Positions 1 and 2 of the rotary selector
Compatible sensor	GW90769 (selector in position II)
LED indication	Front LED for test
Installation	Wall mounting with supplied plugs and screws
Main functions	Monitor wind speed and control the raising of blinds or shutters via output contact
Maintenance	Clean with a dry cloth; check enclosure sealing
Safety	Disconnect power before any intervention; comply with electrical standards
Repairability	Spare parts not available; contact the manufacturer in case of failure
Compliance	Compliant with European directives (CE)

Frequently Asked Questions - GW90770 Gewiss

How to adjust the wind threshold on the GW90770?

Use rotary selector switch no. 5. Positions 3 to 0 correspond to thresholds from 3 to 10 on the Beaufort scale (from 12 km/h to 88 km/h). For a quick change, first enter test mode (position 1 or 2), set the new threshold, then exit test mode.

How to test the wind sensor?

Set rotary selector no. 5 to position 1 or 2 (test mode). Manually rotate the anemometer: the front LED lights up in sync with the rotation. This allows checking operation even at low speed.

Which wind sensor is compatible with this module?

The module is designed for the Gewiss GW90769 wind sensor. Set selector no. 4 to position II for predefined programming.

What to do if the LED does not light up in test mode?

Check the 230 V AC power supply, correct wiring, and that the rotary selector is indeed in position 1 or 2. If the problem persists, contact technical support.

How to connect the GW90770 to a KNX system?

The NO output contacts can be connected to a contact interface such as GW90834 or GW90721, which will send the wind alarm on the KNX/EIB bus.

What is the protection rating of the enclosure?

The enclosure is rated IP55, protecting against dust and water jets. It is suitable for outdoor installation.

Why is the response time 15 seconds?

This delay prevents unwanted switching due to short gusts. After exceeding the threshold, the output closes in 15 s. Recovery takes 15 min after returning below the threshold.

Can multiple wind sensors be used on a single interface?

No, the GW90770 interface is designed for a single sensor. For multiple zones, install as many interfaces.

How to clean and maintain the sensor?

Clean the enclosure with a dry cloth. Regularly check the sealing of the gaskets. Do not use aggressive products. Disconnect power before any maintenance.

What to do in case of failure or malfunction?

Check the power supply, wiring, and settings. If the problem persists, the device contains no repairable parts. Replace it or contact the manufacturer.

USER MANUAL GW90770 Gewiss

White rectangular electronic device with black buttons at the bottom (no visible text or symbols)

GW 90 770

Diagram of a device rear panel with labeled components including numbered parts ①, ②, and ⑥.

L N - +1 2 Sensor ⑦ ③ ④ ⑤ L

INDICE

L N 230Vac L N - + 1 2

Contatti di uscita

The wind sensor interface (GW 90770) allows you to connect the wind sensor (GW 90769) to the movement control system for awnings, blinds etc.

The wind control system can, for instance, raise the blinds or awnings according to the wind speed to protect the more fragile parts such as the blind laths from being damaged.

The wind sensor interface is fitted with two N.O. free of potential output contacts which close when the set wind speed is exceeded.

The outputs can be connected to a contact interface (for instance GW90834 or GW90721) to send the wind alarm signal to the KNX/EIB bus.

L N 230Vac Output contacts L N - + 1 2

Note: the terminals marked 1 and 2 are not connected to the device and should not be used.

INSTALLATION

Loosen screws ② and remove the plastic container cover ① (if the cables will be inserted from the back, perforate the rubber ③ plug and thread the cables).

Fix the device in place using the screws and dowels supplied.

Lay the cables as indicated in the wiring drawing.

When you have finished the configuration procedure, replace the plastic cover.

CONFIGURATION

Select the wind sensor

To use the GW90769 wind sensor, turn the switch ④ to position II (default setting).

Selecting the test mode/setting the threshold

According to its position, the rotating switch ⑤ can be used to:

• Select the wind speed threshold
• Start the test mode
  The rotating switch has 10 different positions (1, 2, 3, ... 9, 0).

Test Mode

Positions 1 and 2 start the test mode: after max 1 second, the front LED ⑥ will light up. Rotate the anemometer and LED ⑥ will light up at the same frequency as the rotation of the anemometer.

The device functions can also be tested at low rotation speeds.

Setting the wind speed threshold

Positions 3 - 0 select the wind speed threshold after which the output contact closes. The settings use the Beaufort scale:

0 = 10Bft (24.5 m/s = 88 km/h)

9 = 9Bft (20.8 m/s = 75 km/h)

8 = 8Bft (17.2 m/s = 62 km/h)

7 = 7Bft (14.1 m/s = 51 km/h)

6 = 6Bft (11.0 m/s = 40 km/h)

5 = 5Bft (8.0 m/s = 29 km/h)

4 = 4Bft (5.5 m/s = 20 km/h)

3 = 3Bft (3.3 m/s = 12 km/h)

After exiting test mode, wait for 4 seconds for the device to correctly read the selected wind speed.

If you change the threshold, please wait 4/5 minutes for the device to read and save the new value.

Helpful tips: To quickly change the thresholds, first select test mode, and set the new value from here.

Terminal ⑦ can be used to connect up to a grounding cable.

TECHNICAL DATA

Voltage: 230V ac 50 Hz

Outputs: 2 NO free of potential contacts

↑↓

Response time: around 15 seconds (after the wind speed exceeds the threshold value).

Reset time: around 15 minutes (after the wind speed returns below the threshold value).

Protection rating: IP65

SOMMAIRE

page FONCTIONNEMENT 16

INSTALLATION 17

CONFIGURATION.... 18