--- product_id: 75022590 title: "KiddeSM120X Interconnect Accessories Smoke Relay Module" brand: "kidde" price: "€ 35.97" currency: EUR in_stock: true url: https://www.desertcart.at/products/75022590-kiddesm120x-interconnect-accessories-smoke-relay-module store_origin: AT region: Austria --- # 120 VAC power supply Interconnects multiple alarms Includes 10 in. 18 GA pigtail leads KiddeSM120X Interconnect Accessories Smoke Relay Module **Brand:** kidde **Price:** € 35.97 **Availability:** ✅ In Stock ## Summary > 🔔 Stay connected, stay protected — the smart relay your safety system deserves! ## Quick Answers - **What is this?** KiddeSM120X Interconnect Accessories Smoke Relay Module by kidde - **How much does it cost?** € 35.97 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/75022590-kiddesm120x-interconnect-accessories-smoke-relay-module) ## Best For - kidde enthusiasts ## Why This Product - Trusted kidde brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight:** At just 1.6 ounces and 7x14x7 inches, it fits discreetly into any modern installation. - • **User-Friendly Controls:** Equipped with a test/reset button for effortless maintenance and peace of mind. - • **Universal Compatibility:** Works flawlessly with Kidde Fyrnetics devices and manual pull stations for versatile safety setups. - • **Seamless Power Switching:** Automatically toggles connected devices on smoke/heat detection for instant alerts. - • **UL Certified Reliability:** Built to meet rigorous UL standards, ensuring trusted performance when it matters most. ## Overview The Kidde SM120X Smoke Relay Module is a UL-approved, corded electric accessory designed to interconnect multiple smoke and heat alarms. Featuring a 120 VAC power supply and 10-inch 18 GA pigtail leads, it enables seamless power switching to auxiliary devices upon detection. Lightweight and compact, it supports manual pull stations and Kidde Fyrnetics devices, ensuring versatile and reliable fire safety integration. ## Description KiddeSM120X Interconnect Accessories Smoke Relay Module ## Features - Switches connected device power when a smoke/heat interconnect signal is received - Internal power Supply for pull station comparability controls and connects auxiliary warning devices - Used with multiple station alarms and detectors use with Kidde fyrnetics devices only - Kidde SM120X - Interconnect Accessories Smoke Relay Module: 408-SM120X - Smoke Relay Module ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Kidde | | Style | Modern | | Power Source | Corded Electric | | Color | Black | | Item Weight | 0.1 Pounds | | Alarm | Audible | | Material | Plastic | | Number of Items | 1 | | Manufacturer | Lumtopia | | UPC | 785577434471 696505167180 765044830968 094700432490 047871001231 | | Part Number | SM120X | | Item Weight | 1.6 ounces | | Product Dimensions | 7 x 14 x 7 inches | | Item model number | SM120X | | Is Discontinued By Manufacturer | No | | Finish | Wired | | Item Package Quantity | 1 | | Included Components | Kidde - Interconnect Accessories Smoke Relay Module: 408-Sm120X - smoke relay module | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Brand:** Kidde - **Style:** Modern - **Power Source:** Corded Electric - **Color:** Black - **Item Weight:** 0.1 Pounds - **Alarm:** Audible - **Material:** Plastic - **Number of Items:** 1 - **Manufacturer:** Lumtopia - **UPC:** 785577434471 696505167180 765044830968 094700432490 047871001231 ## Images ![KiddeSM120X Interconnect Accessories Smoke Relay Module - Image 1](https://m.media-amazon.com/images/I/51uODL435jL.jpg) ## Questions & Answers **Q: How do you wire it to connect your fire sprinklers to the smoke alarms?** A: Hard wired into the 120 VAC to the smoke detector, Black - HOT, White - Neutral, Red - Interconnect. Alarm output; Blue - Common, Yellow - N/C, Orange - N/O, Grey - 9VDC output. http://www.kidde.com/Documents/1276en.pdf The Kidde relay modules can be used to activate auxiliary warning devices such as external bells and sirens, hallway or stairway lighting. Each relays will only activate when it receives a signal from an interconnected alarm. **Q: Will the relay still trigger in a power outage?** A: No, unless you have backup power to the alarms and the relay. **Q: Can I use this to trigger the alarms from either normally open or closed switch? Like a pull station?** A: Yes, this device can be used in either direction, as detailed in the manual. If you use an external relay (like a pull station) to short the grey wire (9v signal) with the red wire (interconnect bus), it will cause the rest of the stations to alarm. **Q: Does it matter to use normally open or normally closed? i have a apc power battery backup that powers multiple servers. if smoke alarm then no or nc?** A: It's my understanding that normally open and normally closed are both supported by apc power backup and Kidde SM120X. My advice is to use normally closed because this is a better fail-safe configuration. If you use normally closed and the connection is broken the apc will shut down. If you use normally open and the connection is broken the apc will remain running and you may never be aware that the connection was broken. I don't know which side should provides the voltage for a normally closed contact, but the SM120X has a DC output voltage for this purpose. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/75022590-kiddesm120x-interconnect-accessories-smoke-relay-module](https://www.desertcart.at/products/75022590-kiddesm120x-interconnect-accessories-smoke-relay-module) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-22*