Impulse Relay ITL 1P 16A 24V AC 12V DC

The Schneider Electric Acti9 iTL A9C30111 impulse relay is a modular 1-pole, 16 A impulse relay, mainly designed for controlling lighting circuits from one or more pushbuttons. It features 1 normally open contact (1 NO) and a coil that can be controlled by 24 V AC at 50/60 Hz or 12 V DC, enabling remote switching through short electrical pulses.

Its bistable operation changes the contact state each time the coil receives a pulse: the first pulse switches the load on and the next switches it off. In this way, several pushbuttons installed at different points can control the same circuit without the need for conventional changeover switches. The device also includes front manual override with priority and local on/off indication.

Main features of the Schneider Electric A9C30111

• Brand: Schneider Electric.
• Range: Acti9.
• Product: Acti9 iTL.
• Reference: A9C30111.
• Type: impulse relay or modular impulse relay.
• Number of poles: 1P.
• Contact composition: 1 NO.
• Rated current: 16 A.
• Control circuit voltage: 24 V AC at 50/60 Hz or 12 V DC.
• Rated operational voltage: up to 250 V AC at 50/60 Hz.
• Control signal type: impulse.
• Permissible impulse duration: 50 ms to 1 s.
• Control: manual and remote.
• Local indication: ON/OFF indication.
• Mounting: DIN rail.
• Width: 18 mm, equivalent to 1 DIN module.
• Electrical durability AC-21: up to 200,000 cycles.
• Electrical durability AC-22: up to 100,000 cycles.

Lighting control by pushbuttons

The Acti9 iTL is specially designed for controlling lighting circuits from multiple points. Each time the coil receives a pulse from a pushbutton, the internal mechanism changes the contact position.

This operating principle makes it possible to install multiple pushbuttons in corridors, stairways, common areas, homes, offices and other spaces where the same lighting needs to be controlled from different locations.

Unlike a conventional contactor, the impulse relay does not need the coil to remain energized in order to keep the contact state. Once the pulse has been received, the mechanism remains in the new position until the next command.

24 V AC or 12 V DC coil

The A9C30111 reference includes a coil designed to operate with two control supply types:

• 24 V AC at 50/60 Hz.
• 12 V DC.

This feature makes it easy to integrate into extra-low-voltage control circuits, separating the voltage used in the pushbuttons from the power circuit voltage when the installation design requires it.

16 A normally open contact

The impulse relay has 1 normally open contact with a rated operational current of 16 A. The power circuit can operate at voltages up to 250 V AC at 50/60 Hz within the conditions specified by Schneider Electric.

The actual switching capacity depends on the type of load connected. Inrush currents of certain LED lamps, fluorescent lamps or loads with electronic components can be considerably higher than their steady-state rated current, so load compatibility should be checked before sizing the circuit.

Impulse operation from 50 ms to 1 second

The coil must receive a short-duration command. Schneider Electric specifies an impulse duration between 50 milliseconds and 1 second.

A momentary press is enough to change the contact state. It is not necessary to keep the coil energized once the switching operation is complete, which distinguishes the operation of an impulse relay from that of a maintained-action relay or contactor.

Manual and remote control

In addition to electrical actuation via pushbuttons, the A9C30111 includes direct manual control from the front. The O-I control allows the device state to be changed locally, providing an alternative means of operation during installation, testing or maintenance work.

Schneider Electric also provides the option to disconnect remote control using the selector during maintenance operations, preventing unintended switching from the associated pushbuttons.

Local ON/OFF indication

The front panel includes a visual ON/OFF status indication. This signaling makes it possible to check directly whether the contact is open or closed without additional measurements.

This feature helps both commissioning and circuit status identification during maintenance tasks.

Compatible with illuminated pushbuttons

Schneider Electric specifies that remote control can be carried out using illuminated pushbuttons with a current of up to 3 mA. This makes it easy to use devices with built-in indication in compatible lighting installations.

When several illuminated pushbuttons are installed, the sum of the indication currents must remain within the limits established for the impulse relay.

Maximum switching frequency

To ensure use within the intended conditions, Schneider Electric sets a maximum frequency of:

• 5 operations per minute.
• 100 operations per day.

These limits must be respected especially in automated applications where pulses may be generated by relays, timers or control systems.

High electrical durability

The Acti9 iTL is designed to withstand a high number of electrical operations. Schneider Electric specifies:

• AC-21: up to 200,000 cycles.
• AC-22: up to 100,000 cycles.

Actual durability will depend on the load, switching frequency, temperature and installation conditions.

Compact one-module DIN format

The A9C30111 occupies only 18 mm in width, equivalent to a standard DIN module, making installation easy even in panels with limited space.

• Width: 18 mm.
• Height: 84 mm.
• Depth: 60 mm.
• 9 mm steps: 2.

Its fixed DIN rail mounting allows it to be combined with MCBs, RCDs, contactors and other Acti9 modular devices.

Electrical connection via terminals

The impulse relay uses terminals for connecting both the power circuit and the control circuit. For remote control it accepts conductors up to 4 mm², depending on the type of cable used.

Schneider Electric specifies a stripping length of 11 mm and a tightening torque of 1 Nm.

The power circuit conductor cross-section must be selected according to the load current, installation method and applicable electrical regulations.

440 V insulation voltage

The device has a rated insulation voltage Ui of 440 V AC and a rated impulse withstand voltage Uimp of 6 kV.

Schneider Electric also classifies it with overvoltage category IV and pollution degree 3 under the specified environmental conditions.

Degree of protection

The impulse relay has an IP20 degree of protection when accessible as a modular device and can reach IP40 once installed inside a suitable enclosure.

It is intended for indoor installation in electrical panels that provide the protection level required by the location.

Operating temperature

Schneider Electric specifies the following environmental ranges:

• Operating temperature: -20 to +50 °C.
• Storage temperature: -40 to +70 °C.
• Relative humidity: up to 95% at 55 °C.
• Pollution degree: 3.

Compatible with Acti9 auxiliaries

The A9C30111 can be combined with different auxiliaries and extensions from the Acti9 iTL family, allowing the impulse relay functions to be expanded according to project needs.

Compatible accessories considered by Schneider Electric include contact extensions and auxiliary modules for control, signaling, timing and centralized control functions.

Applications of the Schneider Electric A9C30111

The iTL impulse relay can be used in different installations where a load needs to be controlled from one or more pushbuttons:

• Corridor lighting.
• Stairways and common areas.
• Homes.
• Offices.
• Retail premises.
• Commercial buildings.
• Lighting control from multiple points.
• Installations with extra-low-voltage pushbuttons.
• Simple impulse-based automation.

Technical data of the Schneider Electric A9C30111

• Manufacturer: Schneider Electric.
• Range: Acti9.
• Product: Acti9 iTL.
• Reference: A9C30111.
• Type: modular impulse relay.
• Main application: lighting control.
• Number of poles: 1P.
• Contact: 1 NO.
• Rated current: 16 A.
• Power network type: AC.
• Rated operational voltage: 250 V AC.
• Frequency: 50/60 Hz.
• AC control voltage: 24 V AC, 50/60 Hz.
• DC control voltage: 12 V DC.
• Signal type: impulse.
• Impulse duration: 50 ms-1 s.
• Control: manual and remote.
• Compatible illuminated pushbutton: up to 3 mA.
• Maximum frequency: 5 operations/min.
• Maximum daily frequency: 100 operations/day.
• Local indication: ON/OFF.
• Electrical durability AC-21: 200,000 cycles.
• Electrical durability AC-22: 100,000 cycles.
• Ui: 440 V AC.
• Uimp: 6 kV.
• Overvoltage category: IV.
• Pollution degree: 3.
• Mounting: fixed on DIN rail.
• Modular width: 1 module.
• Width: 18 mm.
• Height: 84 mm.
• Depth: 60 mm.
• Stripping length: 11 mm.
• Tightening torque: 1 Nm.
• Degree of protection: IP20; up to IP40 in enclosure.
• Operating temperature: -20 to +50 °C.
• Storage temperature: -40 to +70 °C.
• Standards: IEC/EN 60669-1 and IEC/EN 60669-2-2.

Modular impulse relay for controlling lighting from multiple points

The Schneider Electric Acti9 iTL A9C30111 allows a load of up to 16 A to be controlled by pulses from one or more pushbuttons. Its 24 V AC or 12 V DC coil makes it easy to create low-voltage control circuits, while its 1 NO contact switches the load supply without the need to keep the coil energized.

The front manual control, ON/OFF indication, high electrical durability and compact single-DIN-module format make this impulse relay a particularly practical solution for lighting in homes, stairways, corridors, common areas and other installations where operation from multiple points is required.