Emergency Door Release, Triple‑Pole Resettable, LED & Sounder, 12–24 V DC, EM301-LS

Introduction to the EM301-LS and its key features

The EM301-LS Triple‑Pole Resettable Emergency Door Release is a purpose‑built access control device designed to provide immediate manual release of electronically secured doors in emergency situations. Combining a triple‑pole contact arrangement, a dual‑colour LED indicator (green for standby, red for alarm) and an adjustable built‑in sounder, the EM301-LS offers clear visual and audible signalling while delivering flexible integration with modern access control and alarm systems. It is surface‑mounted, constructed from durable ABS with a polycarbonate lid finished in green for fast emergency identification, and it is reset using the supplied EM301‑LS‑KEY.

Detailed description of specifications and benefits

The EM301-LS is engineered to meet the practical needs of installers, facilities managers and safety teams. Below is a breakdown of the most relevant specifications and the benefits they bring in real deployments.

• Supply voltage:12–24 V DC. Benefit: works with the majority of access control and alarm system power supplies used in commercial buildings, making it simple to integrate without special converters.
• Standby current:approximately 20 mA;Operating current:approximately 40 mA. Benefit: low power consumption helps conserve battery backup capacity and reduces load on system power supplies.
• Contact rating:up to 3 A per contact;Outputs:3× (NO/NC/COM). Benefit: the triple‑pole NO/NC/COM arrangement allows control of multiple circuits (for example, door magnets, strike relays or signalling inputs) from a single call point, increasing installation flexibility and reducing the need for additional devices.

• LED:Dual‑colour (green standby / red alarm). Benefit: immediate visual confirmation of device status for occupants and responders.
• Sounder:Built‑in with adjustable modes (continuous or intermittent). Benefit: audible alarm mode can be matched to site policies and local regulations, improving occupant awareness without creating unnecessary disturbance during false activations.
• Reset:Resettable with the supplied EM301‑LS‑KEY. Benefit: avoids single‑use call points and reduces ongoing replacement costs and maintenance downtime — the device can be reused immediately after a verified activation is cleared.

• Material:ABS body, polycarbonate lid. Benefit: robust construction suited to indoor public and commercial spaces.
• Colour:Green (emergency). Benefit: conforms to common visual conventions for emergency release devices.
• Dimensions:Approximately H 90 mm × W 94 mm × D 45 mm;Weight:~0.17 kg. Benefit: compact footprint for surface mounting and compatibility with standard UK back‑box sizes.
• Mounting:Surface mount (compatible with UK back‑box); recommended mounting height 900–1100 mm. Benefit: straightforward installation for retrofits and new builds alike, with recommended ergonomics for accessibility.

• Certifications:CE, UKCA, RoHS, WEEE (per supplier documentation). Benefit: typical regulatory coverage required for commercial installations in many regions — consult the product datasheet for full certification details and site compliance guidance.
• Downloads:Datasheet and installation manual available from the official product page (example: https://www.cdviwireless.com/en/our-products/em301-ls/). Benefit: comprehensive installation instructions help ensure correct wiring and configuration, and reduce on‑site errors.

Use cases and scenarios where the EM301-LS excels

The EM301-LS is well suited to a range of controlled access environments where a manual emergency release is required by policy, regulation or best practice. Typical use cases include:

• Reception and main entrance doors:In buildings where doors are electronically secured during business hours, the EM301-LS gives staff or authorised personnel a local, clearly identifiable means to immediately release the door in an emergency.
• Protected exits and secure areas:For secure areas that still require a rapid manual release option, the triple‑pole outputs allow simultaneous control of multiple lock mechanisms or signalling circuits.
• Commercial and public buildings:Offices, retail units, healthcare clinics and other indoor public spaces where a resettable solution is preferred to single‑use call points, reducing lifetime cost and maintenance effort.
• Integration with access control or alarm panels:Installers can use the NO/NC/COM outputs to feed both lock release inputs and alarm monitoring circuits, enabling coordinated responses and event logging.
• Retrofit and new installations:Surface mounting and a compact form factor make this device useful for both new builds and retrofit projects where minimal structural modification is desired.

Comparisons with similar products in the market

When selecting an emergency door release, purchasers typically evaluate a few categories of product: single‑use break glass call points, simple momentary pushbuttons, and resettable releases like the EM301-LS. Key points of comparison:

• Single‑use break glass units provide a clear visual cue that the device has been triggered, but the glass must be replaced after every activation, incurring ongoing cost and downtime. The EM301-LS, being resettable with a dedicated key, eliminates replacement consumables and allows the device to be returned to service quickly after verification.
• For high‑traffic sites or locations prone to accidental activations, a resettable device typically reduces total cost of ownership and maintenance calls.

• Many simple emergency releases provide a single contact closure. The EM301-LS provides three independent contacts (NO/NC/COM), enabling control of multiple circuits (for example, a door mag and an alarm input) from one unit. This can simplify wiring and reduce the need for intermediary relays or additional call points.

• Devices lacking built‑in indication rely solely on the central alarm system for feedback. The EM301-LS provides local, dual‑colour visual status and an adjustable sounder to raise local awareness instantly. This improves occupant response and assists first responders in quickly identifying the source of an activation.

Brands and models differ in form factor, mounting options, contact ratings and certification. The EM301-LS is competitive where low standby current, reset capability, and triple‑pole outputs are priorities. When comparing models, check for compatibility with your access control electronics (voltage and current limits), certification requirements for your region, and any additional features such as vandal resistance, IP rating for outdoor use, or integration with specific alarm protocols.

Customer testimonials and installer feedback

Formal customer testimonials for this exact model are not supplied here. However, feedback themes common to resettable emergency releases and reported by installers and facilities teams typically include:

• Appreciation for the resettable design — reduced consumable costs and fewer service visits compared with break‑glass units.
• Praise for clear local indication — the dual‑colour LED and adjustable sounder help confirm status at a glance and attract attention during an alarm.
• Positive comments on installation simplicity — surface mounting and compatibility with standard back‑boxes make on‑site fitting quicker, particularly in retrofit projects.

If you require customer reviews or case studies from actual deployments, check distributor pages or request references from the supplier; product pages and distributor listings often include PDF datasheets, manuals and, occasionally, customer use stories.

Commercial considerations and pricing

Suggested price information provided with the product data lists a suggested_price value of 36.95 and a cost_price of 30.95. The supplier also notes that currency and whether the cost figure is landed (including shipping and taxes) are not confirmed. Before finalising retail or trade pricing, confirm the currency and whether supplier prices include import duties, VAT or shipping to ensure margins and RRP are accurate for your region.

Conclusion — why the EM301-LS is a strong choice

The EM301-LS Triple‑Pole Resettable Emergency Door Release is a practical, cost‑effective choice for projects that need a reliable manual release with clear local indication and flexible wiring options. Its triple‑pole contacts support multi‑circuit control, the dual‑colour LED and adjustable sounder enhance occupant awareness, and the resettable mechanism reduces ongoing costs and downtime compared with single‑use alternatives. Low standby and operating currents make it compatible with common 12–24 V DC access control systems, and the surface‑mount design simplifies installation.

For installers and facilities managers specifying emergency release devices for indoor, surface‑mounted applications — particularly in commercial, public or healthcare settings — the EM301-LS offers a balance of functionality, durability and operational economy. Verify regional certifications, confirm supplier pricing details, and consult the official datasheet and installation manual to ensure the device meets your site requirements and complies with local safety regulations.