# External Momentary Push Button ACO INS-OB (model 11993) — Normally Open contact

**URL:** https://aio.lv/en/product--aco-11993--11789938
**Data updated:** 2026-03-09 07:10 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** ACO
**Manufacturer code:** 11993
**EAN:** 5905997381666
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 30.16 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--aco-11993--11789938

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

ACO INS-OB external momentary push button (MPN 11993) is a normally open (NO) mechanical switch designed for external mounting. It provides a simple on-off contact for control circuits, allowing temporary signal closure when pressed. Suitable for building automation, door entry systems, industrial control panels and other applications requiring a reliable external manual input.

## Long description

The ACO INS-OB external momentary push button is a normally open mechanical switch intended for external mounting. It provides a simple, temporary on-off contact that closes only while the button is pressed, creating a reliable manual input for control circuits and signalling. The device is suitable for use in building automation, door entry systems, industrial control panels and other applications that require a durable external momentary switch.
Advantages
This normally open push button offers straightforward mechanical operation with clear tactile feedback and a defined momentary action. Its design supports external installation, enabling convenient placement on panels, enclosures or near access points. The switch provides compatibility with a wide range of control systems and is built for repetitive manual actuation, delivering consistent contact performance for signaling and control tasks.
Suitable for
Door entry and access control systems
Building automation and alarm systems
Industrial control panels and machine start/stop inputs
Temporary signaling and user-initiated control inputs
Key specifications
Contact type: Normally Open (momentary)
Mounting: External mounting for panels or enclosures
Operation: Mechanical push-button with momentary action
Intended use: Manual input for control and signaling circuits
How to use
Install the push button in an appropriate external location on a panel or enclosure, ensuring secure mechanical fixation and correct alignment with the required hole or cutout. Wire the switch into the control circuit so that the normally open contact closes when the button is pressed, following the wiring polarity and safety practices of the target system. Verify the contact operation by pressing the button and observing the control system response; perform any required insulation or sealing if the installation is exposed to humidity or dust.
Usage recommendations
Use the push button within the electrical ratings and environmental conditions of the host system. For long-term reliability, avoid excessive mechanical force and protect the device from prolonged exposure to direct moisture or corrosive environments. Regularly inspect mounting and wiring connections and test the momentary action as part of routine maintenance for control and access systems.

## FAQ

### How much does the External Push Button ACO INS-OB 11993 cost, and is it available for purchase?

The price is 36.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 03.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ACO products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ACO service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11789938/67187867_large.webp