eSSL 3 Door Interlocking System Controller Board with Terminal Blocks

eSSL 3 Door Interlocking System Without Memory

KTI01003001DR03

Product Description

Microcontroller-based 3-door interlocking controller designed for cleanroom airlocks, laboratories, and controlled industrial access environments.

Make: eSSL
Model: Interlocking System 3 Door Without Memory
Architecture: Microcontroller-based autonomous sequential logic execution
Memory Type: Non-memory operational logic controller
Station Inputs: Dedicated terminals SW1, SW2, and SW3 for Door 3, Door 2, and Door 1 push switches or readers
Emergency Release: Dedicated EMG override terminal for emergency break-glass switch or fire release integration
Audio Indicator: Integrated buzzer output for alert and door state signalling
Hardware Compatibility: Interfaces with standard push buttons, card readers, and electromagnetic locks
Net Weight: 0.58 kg

KTI01003001DR03

Price

₹ 8,032.50 excl. GST

+ 18.00% GST. Freight after pincode at cart.

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Product Details
Available Brands	Essl
Unit	Numbers
HSN Code	73083000
Weight	0.58 kg
Warranty	12 Months No-Onsite Warranty
Tags/categories	Automation Access Control, Attendance System Door Interlocking

Usually dispatched within 8 days

About this product .

The eSSL 3-Door Interlocking Controller is built around a dedicated microcontroller core engineered to govern sequential access across three interconnected doors. Housed in a compact electronic enclosure weighing 0.58 kg, the controller executes deterministic hardware-level switching to prevent cross-contamination and air leakage between adjacent controlled spaces.
Operating as a real-time logic system without an onboard event storage buffer, the unit evaluates door status continuously. When any single door is unlatched or opened, the microcontroller actively suppresses unlock requests across the remaining two doors, maintaining pressure boundaries and security segregation.
Terminal connectivity includes dedicated switch and reader lines designated SW1, SW2, and SW3 corresponding to Door 3, Door 2, and Door 1. These inputs readily accommodate mechanical push-to-exit buttons, access card readers, or magnetic lock feedback sensors to confirm lock release and closure states.
Safety compliance is reinforced through a dedicated EMG emergency terminal. When integrated with an emergency push station, break-glass unit, or central fire alarm interface, the system overrides all interlocking logic to release power to the connected locks, ensuring an unobstructed evacuation path.
This 3-door interlocking unit is widely deployed across pharmaceutical manufacturing airlocks, sterile cleanrooms, hospital gowning chambers, biocontainment laboratories, and high-security server rooms. An onboard buzzer provides audible feedback to notify operators of interlocking violations or prolonged door opening conditions.
Routine maintenance involves periodically verifying relay trigger functionality and cycling each door station individually to ensure downstream doors remain securely interlocked. All wiring connections to SW1, SW2, SW3, and the EMG terminal should be checked during scheduled preventative maintenance audits.

Product Information .

Corporate Offices Worship Places Industries, Factories Hospitals, Clinics Shopping Malls, Showrooms Government Buildings, Offices Banks High Security Zones Defense Sectors Server Rooms Auditorium Conference Hall Emergency Services

Hardware Interface and Subsystem Compatibility

The eSSL 3-door interlocking control unit (reference KTI01003001DR03) is engineered for autonomous access sequencing across multi-portal cleanroom and containment environments. Operating via a dedicated microcontroller-based architecture without onboard event memory, the controller performs immediate logic execution to inhibit adjacent doors whenever any single portal in the 3-door array is unsealed.

Door Terminal Allocations and Input Compatibility

Field switching devices and access authenticators interface with the controller through dedicated terminal blocks designated specifically for each managed perimeter door. Installers must map station wiring precisely to the designated terminal channels:

SW1 Terminal: Interfaces with access push switches or reader devices assigned specifically to Door 3.
SW2 Terminal: Interfaces with access push switches or reader devices assigned specifically to Door 2.
SW3 Terminal: Interfaces with access push switches or reader devices assigned specifically to Door 1.

These input ports support industry-standard momentary push buttons, request-to-exit switches, and third-party access card readers. The controller continuously samples terminal inputs to manage lock states in real time, preventing concurrent door releases across any two connected stations.

Interlocking Terminal and Hardware Compatibility Matrix

Terminal Channel	Designated Portal	Compatible Field Peripherals	Interlocking Control Logic
SW1	Door 3	Access Readers, Request Push Switches	Grants Door 3 access while maintaining lock inhibition on Door 1 and Door 2.
SW2	Door 2	Access Readers, Request Push Switches	Grants Door 2 access while maintaining lock inhibition on Door 1 and Door 3.
SW3	Door 1	Access Readers, Request Push Switches	Grants Door 1 access while maintaining lock inhibition on Door 2 and Door 3.
EMG	Universal (Doors 1, 2, 3)	Emergency Release Push Switches, Break-Glass Stations	Overrides microcontroller interlocking logic to release all doors during emergency evacuation.
Buzzer Output	System-Wide	Integrated Controller Buzzer Signaling	Generates immediate audible status alert indicators during interlocking sequence events.

Locking System and Emergency Hardware Integration

The interlocking controller is compatible with standard electromagnetic locking hardware, including robust magnets installed across sliding or swing door frames. When an authorized input signal is detected at SW1, SW2, or SW3, the microcontroller energizes or de-energizes the respective electromagnetic lock while keeping the remaining two portals securely locked.

For life-safety integration, the dedicated EMG terminal connects directly to emergency push switches or break-glass call points. Actuation of an emergency device wired to the EMG terminal immediately bypasses the controller's door-locking sequence, disengaging all connected magnetic locks to facilitate unimpeded egress across all three managed portals.

Facility and Environmental Application Compatibility

Because the unit operates autonomously without the requirement for an event memory buffer, network database links, or host PC software overhead, it provides instantaneous sequencing ideal for specialized isolation perimeters. Compatible installation environments include:

Pharmaceutical and Cleanroom Airlocks: Maintains differential air pressure and stops cross-contamination in cascading gowning rooms.
Critical Industrial Facilities: Suitable for factories, manufacturing clean zones, and defense installations requiring physical airlock boundaries.
Secure Infrastructure: Operates reliably within laboratories, medical clinics, hospitals, banks, and server room access vestibules.

Installation, Terminal Wiring, and Commissioning Guide

Proper integration of the eSSL 3-door microcontroller-based interlocking controller (reference KTI01003001DR03) ensures reliable sequencing across critical cleanroom airlocks, gowning areas, laboratories, and high-security zones. Because this controller operates without onboard event memory, all interlock actions and lock state evaluations are executed autonomously in real time by the microcontroller. Physical installation involves mounting the 0.58 kg electronic controller assembly in a secure enclosure and routing dedicated field wiring for door sensors, input switches or readers, locking hardware, and emergency circuits.

Terminal Interface Allocation

The controller board features dedicated input terminals designated for sequencing inputs across all three managed entry points, as well as an emergency override interface. Ensure that field wiring correctly matches the designated terminal-to-door mapping:

SW3 Terminal: Designated input interface for Door 1 switch or card reader.
SW2 Terminal: Designated input interface for Door 2 switch or card reader.
SW1 Terminal: Designated input interface for Door 3 switch or card reader.
EMG Terminal: Dedicated emergency override interface for direct connection to an emergency release switch or break-glass station.

Field Device Wiring and Hardware Interfacing

The system is engineered to interface with standard access peripherals, including push switches, access control card readers, and electromagnetic lock systems. Each door station requires discrete signal lines connected back to the central controller. When connecting request-to-enter or request-to-exit devices at Door 1, Door 2, and Door 3, wire the signal triggers into SW3, SW2, and SW1 respectively.

For electromagnetic lock integration, power and control lines must run through the controller's switching outputs to ensure that releasing one door immediately locks and inhibits the remaining two doors. An integrated buzzer output is provided directly on the unit to supply audible alert and door status signalling during access sequencing and transition cycles.

Emergency Override Circuit Integration

Life safety and emergency evacuation protocols require a fail-safe override. An emergency release push switch or emergency break-glass station must be wired directly to the controller’s EMG terminal. When the emergency switch is triggered, the microcontroller immediately bypasses standard interlock sequencing logic, forcing the release of all connected electromagnetic door locks to allow unimpeded egress across all three doors.

Commissioning and Functional Validation

Once all physical connections to SW1, SW2, SW3, and EMG are completed, conduct systematic functional commissioning prior to handing over the facility:

Individual Door Verification: Trigger the switch or reader at Door 1 (SW3). Confirm that Door 1 unlocks while Door 2 (SW2) and Door 3 (SW1) remain locked and ignore all input requests.
Interlock Inhibition Check: Repeat the validation sequence for Door 2 and Door 3 in turn, verifying that when any single door is open, the integrated logic inhibits the other two doors from unlocking.
Status Signalling Test: Verify that the integrated buzzer sounds appropriately during door transit or alert conditions according to system status.
Emergency Release Validation: Depress the emergency switch wired to the EMG terminal to confirm instantaneous release of locks across Door 1, Door 2, and Door 3.
Diagnostics: If interlocking sequencing fails or a door fails to lock out other stations, inspect field wiring at terminals SW1, SW2, and SW3 to resolve any open, loose, or disconnected switch/reader feedback lines.

Industrial and Critical Infrastructure Use Cases for the eSSL 3-Door Interlocking System

The eSSL 3-Door Interlocking System (Model: Interlocking System 3 Door - Without Memory, KTI01003001DR03) provides real-time logic management across multi-door transitional boundaries. Utilizing a dedicated microcontroller-based architecture that operates autonomously without an onboard event memory buffer, the controller actively inhibits the release of any two doors when any single door in the three-door loop is open or unlatched. This strict sequencing makes the 0.58 kg controller unit an essential hardware asset across controlled environments requiring atmospheric isolation, cleanroom zoning, and physical access segregation.

Pharmaceutical Processing and Cleanroom Airlocks

In pharmaceutical manufacturing plants and cleanroom suites, airlocks and multi-stage personnel air showers require rigorous pressure differential containment to stop airborne particulates and prevent cross-contamination. The eSSL controller coordinates entry sequences across three access stages—typically linking an unclassified corridor, an intermediate gowning or decontamination room, and a certified sterile cleanroom zone.

Pressure Cascade Maintenance: By mapping door switches or access readers across the SW1, SW2, and SW3 terminals (corresponding to Door 3, Door 2, and Door 1), the controller ensures that opening a gowning chamber door immediately locks both the external approach and internal clean area doors, preserving air cascades.
Buzzer Alerts: The integrated buzzer provides audible alerting during sequential access operations, signalling users if a conflicting door access attempt is rejected while an active door remains unclosed.

Data Centers, Server Rooms, and Critical IT Enclosures

High-density IT server rooms and colocation facilities rely on physical mantraps and segregated transition corridors to prevent tailgating and enforce multi-factor entry stages. Integrating the controller allows facilities to interconnect external access corridors, staging vestibules, and server vault floors into a synchronized 3-door access interlock.

Because the unit operates without onboard event memory, logic execution is instantaneous and immune to local memory buffer overflows or data-logging latency. Readers connected to terminals SW1, SW2, and SW3 interface with electromagnetic locks to enforce single-door transit protocols before grant permissions can be activated at the subsequent entry threshold.

Laboratories, Isolation Wards, and Clinical Facilities

Healthcare facilities, quarantine wards, containment laboratories, and clinics utilize the eSSL 3-door controller to establish strict transition perimeters between infectious or bio-secure zones and general hospital corridors. Multi-door gowning and staging rooms function continuously under mutual exclusion logic, ensuring hazardous agents or airborne pathogens remain physically sealed within targeted laboratory areas.

Banking Vaults, Defense, and High-Security Government Zones

Government offices, defense sector rooms, and commercial banking facilities deploy 3-door interlocking configurations to manage high-value asset storage zones and perimeter mantraps. Personnel transiting through checkpoint vestibules must clear intermediate inspection chambers before access to secondary or tertiary vault doors is permitted.

For life-safety compliance in these secure installations, the controller provides a dedicated EMG terminal configured to accept a centralized emergency release switch or break-glass station. When triggered, the emergency override bypasses all active interlocking restrictions across Door 1, Door 2, and Door 3 simultaneously to facilitate immediate personnel evacuation.

Application and Terminal Mapping Overview

Facility Type	Target Application	Mapped Controller Interface	Operational Priority
Pharmaceutical & Cleanroom	3-stage personnel gowning airlock	SW1 (Door 3), SW2 (Door 2), SW3 (Door 1)	Contamination isolation & air balance
Server Rooms & Data Centers	Dual-stage physical mantrap vestibule	SW1, SW2, SW3 reader/switch inputs	Anti-tailgating enforcement
Hospitals & Laboratories	Biological barrier and quarantine airlock	SW1, SW2, SW3 with internal buzzer	Aerosol containment & sequence alerting
Banking & High-Security Zones	Multi-compartment secure vault passage	EMG terminal input override	Physical perimeter access & emergency exit

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