Schneider Electric A9C30115 iTLi 1NO+1NC 16 A Impulse Relay

A9C30115: changeover impulse relay with one NO and one NC contact

The A9C30115 is a Schneider Electric Acti9 product listed in the datasheet as: impulse relay iTLI – 2P – 1NO+1NC – 16A – coil 12 VDC – 24 VAC 50/60Hz. The A9C30115 is an iTLI changeover impulse relay. It has one normally open and one normally closed contact in a 2P body, and each pulse swaps their state, so one circuit is switched on while the other is switched off. It is the product for alternating two circuits from the same push-button. Seven Star LLC supplies the A9C30115 in Oman and the GCC as an independent supplier based in Muscat.

The title lists iTLI (the changeover version of the iTL range), 2P with 1 NO + 1 NC, a 16 A contact rating and a coil of 12 V DC or 24 V AC 50/60 Hz. The datasheet lists the device application as changeover relay and shows an operational voltage of 250 V AC.

Technical specifications of the A9C30115

How the A9C30115 works

Think of the relay as a memory with one input. Each press of any connected push-button adds one pulse, and the contact changes state with every pulse. Any number of push-buttons can be wired in parallel, so a corridor with six doors needs six buttons and one relay. The trade-off is that the relay only knows ‘toggle’, so the state of the circuit after a power cut or a lost pulse should be verified when a scheme depends on it.

At rest, the NC contact is closed and the NO contact is open. A pulse of 50 ms to 1 s swaps them and the relay holds the new state. The next pulse reverses it. Because two circuits alternate, typical schemes are a duty and standby fan, a lamp that is lit when equipment is off and goes out when it is on, or two light groups that exchange roles.

Control and contact data of the A9C30115

Coil voltage: 24 V AC 50/60 Hz; 12 V DC. Rated operational voltage: 250 V AC 50/60 Hz. Rated current: 16 A. Control type: Remote and manual control; Coil deconnection. Impulse duration: 50 ms–1 s. Switching frequency: 5 switching operations/minute; 100 switching operations/day. Remote control type: Illuminated push-button 3 mA. Electrical durability: AC-21: 200000 cycles; AC-22: 100000 cycles.

AC-21 and AC-22 are the load categories of IEC 60947: AC-21 refers to resistive loads including moderate overloads and AC-22 to mixed resistive and inductive loads. The higher cycle count for AC-21 shows that purely resistive circuits give the longer contact life.

Range and accessories around the A9C30115

The A9C30111 differs in poles 1P against 2P here; contacts 1 NO against 1 NO + 1 NC here. The A9C30212 differs in contacts 2 NO against 1 NO + 1 NC here; coil 48 V AC 50/60 Hz against 24 V AC 50/60 Hz here.

The datasheet lists compatible accessories and range members for this reference: Acti9 iATEt; Acti9 iATLc; Acti9 iATLc+s; Acti9 iATLm; Acti9 iATLs; Acti9 iETL iTL 16; Acti9 iATLc+c. The comparison table lists the impulse relays of this group.

Selection checklist for the A9C30115

• Make sure the scheme really needs a swap of two circuits; a plain impulse relay suffices for one load.
• Check the coil: 12 V DC or 24 V AC 50/60 Hz, not mains.
• Check the pulse source: a push-button or a controller output that delivers a pulse of 50 ms to 1 s.
• Check the width of 18 mm (2 pitches) against free space on the rail.
• Check load type against AC-21 and AC-22 data, including inrush of LED or electronic loads.

Installation and maintenance of the A9C30115

Test a new installation by pressing each button station in turn and watching the ON/OFF indicator on the relay. A relay that toggles twice per press usually has an illuminated button leaking current or a bouncing contact; a relay that does not respond usually has a wrong coil voltage or an open neutral. Work with the supply isolated while wiring and record button positions on the board label for later maintenance.

Environmental data from the datasheet: -20 to 50 °C in operation, -40 to 70 °C in storage, relative humidity 95 % at 55 °C.

Where the A9C30115 is used in Oman and the GCC

Alternating loads are the classic use: two pumps or two fans that must take turns so that wear is shared, or a pair of lighting circuits for day and night modes. The low-voltage coil suits installations where the push-buttons are on a 24 V control line, as in hotel corridors, offices and some industrial control panels in the Gulf.

The datasheet gives certification entries GOST and CCC for this reference, a longer list than the single-pole A9C30111 which shows only GOST. For projects with specific approval requirements, check the current datasheet against the contract list instead of assuming the family has the same approvals.

Information to send with an RFQ for the A9C30115

• Full reference (A9C30115) and quantity required
• Supply and control voltage at site, with the frequency
• Existing panel, rail and neighbouring devices it must fit beside
• Delivery location and timing
• Whether it is a spare, a like-for-like replacement or a new installation
• Number of push-button stations and whether they are illuminated

Documents and quotation

A datasheet for the A9C30115 is attached on this page. It lists the electrical, mechanical and environmental data summarised above, and it should be read together with the manufacturer’s installation instructions for the final design.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.