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USER MANUAL GW90851 Gewiss
Warning! The safety of this appliance is only guaranteed if all the instructions given here are followed scrupulously.
These should be read thoroughly and kept in a safe place.
Chorus products can be installed in environments which are dust-free and where no special protection against the penetration of water is required.
They shall be installed in compliance with the requirements for household devices set out by the national standards and rules applicable to low-voltage electrical installations which are in force in the country where the products are installed, or, when there are none, following the international standard for low-voltage electrical installations IEC 60364, or the European harmonization document HD 60364.
Gewiss sales organization is ready to provide full explanations and technical data on request.
Gewiss SpA reserves the right to make changes to the product described in this manual at any time and without giving any notice.
Pack content
n. 1 Easy 2-channel shutter actuator 6 A - DIN rail
n. 1 Bus terminal
n. 6 Screw terminals
n. 1 Cover with screw
n. 1 Installation and user manual
Summary
The Easy 2-channel shutter actuator 6 A - DIN rail allows you to command the movement of 2 roller shutters (curtains, Venetian blinds, etc.) or 2 groups of roller shutters (curtains, Venetian blinds, etc.).

Each group may have maximum 2 motors, as long as support or insulation relays are used.
The 2 output relays for each channel, one for UP and one for DOWN movements, are interlocked to avoid damage to the connected motor.
The movement commands can be accessed through Home Automation control or sensor devices using the KNX bus, or they can be generated locally using the two front buttons.
The actuator is powered by the bus line and it is equipped with 2 green front LEDs for each channel which indicate the shutter movement status (UP/DOWN).
The actuator can function in shutter or blind mode, and is capable of handling actuation following priority, scene and alarm commands. The operating methods can be used simultaneously.
Functions
The motor actuator is able to handle movement, alarm and priority commands simultaneously. When more than one mode is activated at the same time, the actuator will enable the one with highest priority status.
The priority of the various functions, from maximum to minimum, is as follows:
Relay status on loss of power to the bus
- Priority controls
- Alarms control
Relay status on reinstatement of power to the bus
- Shutters/blinds movement, scene management, local command push Buttons
MAX PRIORITY
MIN PRIORITY
The two green status indicator LEDs for each channel light up when the contacts with the respective relays are closed (UP/DOWN).
SHUTTER MOVEMENT HANDLING
It raises or lowers the shutters, or stops the movement when it receives the relative command.
If the Stop command is not sent, the motor will only stop at the end of the Movement Time: The shutters must therefore be fitted with stroke end sensors or an autonomous clutch.
BLIND MOVEMENT HANDLING

WARNING: In order to fully exploit this mode, the blinds must be able to mechanically orientate their laths with short UP/DOWN movements performed by the motor.
The blinds can be raised or lowered, or the movement can be stopped using the relative command. When a blind stops, the actuator receives a short movement command and the laths are rotated.
If the Stop command is not sent, the motor will only stop at the end of the Movement Time: the blinds must therefore be fitted with stroke end sensors or an autonomous clutch.
ALARMS CONTROL
If this function is enabled, the actuator completely opens or closes the shutters (blind, motorised curtain) when it receives an alarm message from a wind or rain sensor.
The open or close option is set during the programming phase.
As an extra safety measure, if the actuator does not receive a "no alarm" message for more than 30 minutes from the sensor, it interprets this as a malfunction and consequently moves the shutter to the preset safety position.
The alarm status persists until the actuator receives a "no alarm" message.
At the end of the alarm status, the actuator returns the shutter to its original position (or performs the last command received, if it received a command during the alarm status phase).
PERFORMING PRIORITY CONTROLS
On receiving an override command, it moves the shutter to the set position (UP or DOWN). Until the priority control is cancelled, the actuator will ignore all other commands it receives, including wind or rain alarms.
When the priority control is cancelled, the actuator returns the shutter to its original position (or performs the last command received, if it received a command during the priority status phase).
SCENE MANAGEMENT
Each actuator channel is able to memorize and perform up to 8 scenes; each one is associated to a precise position (UP, DOWN or intermediate) of the shutter.
The scene can only be learned when the shutter is at a standstill.
Move the shutter to the desired position before memorising the scene.

WARNING: the installation of the device must be exclusively done by qualified personnel, following the regulations in force and the guidelines for KNX installations.
Warnings for KNX installations
- The length of the bus line between the actuator and the power supply unit must not exceed 350 metres.
- The length of the bus line between the actuator and the most distant KNX device to be controlled must not exceed 700 metres.
- Do not create ring circuits so as to prevent undesirable signals and overloads.
- Keep a distance of at least 4mm between the individually insulated cables of the bus line and those of the electric line (figure C).
- Do not damage the electrical continuity conductor of the shielding (figure D).

WARNING: the unused bus signal cables and the electrical continuity conductor must never touch elements under power or the earth conductor!
Assembly on DIN rail
Assemble the Easy 2-channel shutter actuator 6 A on a 35mm DIN rail in the following way (figure G):
- Insert the upper coupling of the device in the DIN rail.
- Turn the device and lock it on the DIN rail, using the fixing tab.
Electrical connections

WARNING: cut off mains power before connecting the device to the electricity mains!
Figure B shows the electrical connections diagram.
- Connect the bus cable's red wire to the terminal's red connector (+) and the black wire to the black connector (-) . Up to 4 bus lines (wires of the same colour in the same connector) can be connected to the terminal (figure E).
- Insulate the screen, the electrical continuity conductor and the remaining white and yellow wires of the bus cable (should a bus cable with 4 conductors be used), which are not needed (figure D).
- Insert the bus connector into the special feet of the device. The fastener guides determine the direction it should be inserted. Insulate the bus terminal using the relative cover, which must be screwed onto the device.
INSTALLATION
The cover guarantees that the power cables and the bus cables are separated by at least 4mm (figure F).
- Connect the load to the special screw terminals above and below the actuator, checking that they do not exceed the current limits indicated in the Technical Specifications.
Initialization with the Easy Controller
- Power up the device through the bus.
- Have the system acquire the device with one of the following procedures:
Automatic acquisition:
-
select the "Search/Config." or "Scan Range" command in the "System" menu;
-
Manual acquisition:
-
select the "Add device" menu in the "System" menu;
- briefly press (< 2 seconds) the programming key. The programming LED will light up during the acquisition process (figure A).
The device acquired is listed with a number allocated, product code and a list of the channels in the "Devices" view.
Initialization with the Easy Base Unit (GW 90 831)
- Power up the device through the bus.
-
Have the system acquire the device with one of the following procedures:
-
Automatic acquisition (the device still has the factory settings):
-
select the "Application New function" or "Application Edit function" menu in the Easy base unit: the device will be recognized automatically.
-
Manual acquisition (the factory settings have been modified):
-
select the "Application Search device" menu in the Easy base unit;
- briefly press (< 2 seconds) the programming key. The programming LED will light up during the acquisition process (figure A).
The device acquired by the Easy base unit will be listed, with the number assigned, in the channels of the "Application New function" or "Application Edit function" menus.
PROGRAMMING WITH THE EASY CONTROLLER
Program the actuator with the Easy controller (GW 90 837 / GW 90 838 / GW 90 840) or with the Easy base unit (GW 90 831).
The device can be selected by proceeding as follows:
- by pressing one of local command buttons: the corresponding channel will be highlighted in the channel list;
- directly from the list of channels.
| Names of the functions | |
| blinds pushbutton Handling | of shutters or blinds using blinds pushbutton |
| blinds Handling of shutters | or blinds using blinds |
| Shutter edges Handling command | for shutters or blinds with edges |
| scene Actuation and memorising | of the scenes |
| priority control Override actuation | |
| Wind sensor Actuation with wind alarm | |
| Rain sensor Actuation with rain alarm | |
The functions can be created after the device has been selected.
Refer to the Easy base unit documentation for further information on the programming procedures the Easy base unit or Easy Controller documentation.
Configuration parameters (Easy)
After creating the required function the actuator's operating parameters can be set. The parameters available, in relation to the function created, are listed in the following table.
The underlined value is the default value.
| Function: For all functions |
| Parameter: Operation mode |
| shutters Handling of Shutters |
| blinds Handling of blinds and regulation of laths |
| Function: alarm | |
| Parameter: Alarm mode | |
| No alarm Alarm signal ignored | |
| Alarm pos.: DOWN Complete raising of the shutters | |
| Alarm pos.: UP Complete closure of the shutters |
Programming the stroke and movement times
The Easy 2-channel shutter actuator 6 A uses two settable time options to handle the transitional shutter positions and the power cut-off to the motor.
- Stroke time, which is the time required for the shutter to close entirely from a completely open position;
- Movement time, equal to 110% of the stroke time, which is the safety time after which the power to the electric motor is cut-off.
The stroke time is memorised on the actuator following the procedure below:
- Open the shutter completely ("all UP").
- Simultaneously press the 2 local command push Buttons relating to the channel to be set (figure A).
- Within 5 seconds (before the LEDs stop flashing) press the DOWN push-button to lower the roller shutter and begin the time count.
- When the shutter is completely closed ("all DOWN") press either of the local command buttons to memorise the stroke time then exit the setup procedure. Make sure you press the button as soon as the shutter is completely closed in order to memorise the correct stroke time.
In the "Venetian" mode a number of steps can be managed which are needed to completely open or close the slats.
The number of steps is stored with the following procedure:
- Move the slats into the completely open position.
- Press simultaneously the 2 local control push Buttons of the channel to set (figure A).
- Within 5 seconds (before the LEDs stop blinking) press the UP push Buttons the number of times corresponding to the number of steps to adjust the slats.
- When the 5 seconds have elapsed, the UP LED blinks the number of times corresponding to the value stored.
Using the local command buttons
The 2 local command buttons for each channel (figure A) are used to command the shutters or blinds as follows:
- Pressing and long holding ( >0.5 s) the button, it moves the shutter or blind UP or DOWN for the preset Movement Time.
- If the shutter or blind is moving, press and instantly release (<0.5 s) either button to stop it.
- In blind mode, when the blind is at a standstill, each time the button is pressed and instantly released (<0.5 s) will alter the inclination of the laths.
Transitional positions of the shutter or blind
When executing a scene, the shutter or blind will move to the previously memorised transitional position.
When an alarm or override status is cancelled (receipt of an alarm or override end command) the actuator will execute the last memorised command and, if there are none, it will move to the position before the alarm or override status occurred.
Behaviour on the failure and reinstatement of the bus power supply
If the power to the bus decreases below 18V dc for over 1.5 ms the movement of the shutter or blind is interrupted
When the power is reinstated on the bus, the shutter or blind does not move until it receives a new movement command. If an alarm or a forcing is active, the outputs return to the status they occupied prior to the BUS failure.
Maintenance
This device requires no maintenance. Use a dry cloth for possible cleaning.
TECHNICAL DATA
| Communication | Bus KNX |
| Power Supply | By KNX, 29 V dc SELV bus |
| Bus cable | KNX TP1 |
| Bus current consumption | 10 mA max |
| Control elements | 1 mini programming key |
| 4 local command buttons | |
| Display elements | 1 red programming LED |
| 4 green output status signal LEDs | |
| Actuator elements for each channel | 2 single-pole relays with mechanical interlock |
| Output contact | 4 NO 8 A (cosφ=1) - 250 Vac |
| Max current per load type | Motors and reduction units: 6 A according to EN60669-2-1 |
| Resistive load: 8 A | |
| Ambit of use | Indoors, dry places |
| Operating temperature | -5 ÷ 40 °C |
| Storage temperature | -25 ÷ 70 °C |
| Relative humidity | Max 93% (no condensation) |
| Bus connection | 2-pin Ø 1 mm plug connector |
| Electrical connections | Extractable screw terminals, Max cable width: 4 mm² |
| Protection rating | IP20 |
| Dimensions | 4 DIN modules |
| Reference standards | Low Voltage Directive 2006/95/EC |
| EMC Directive 2004/108/CE | |
| EN50428, EN50090-2-2, EN60669-2-1 | |
| Certification | KNX/EIB |
SOMMAIRE
page AVERTISSEMENTS GENERAUX 28
DESCRIPTION GENERALE 29
INSTALLATION 31
PROGRAMMATION AVEC EASY CONTROLLER 32
EN SERVICE 36
DONNEES TECHNIQUES 37
EasyManual