- The BR3-X is a programmable 3-relay advanced logic module designed to control locks, door position, and occupancy indicators in commercial restroom applications.
- It supports multiple configurable functions, including timers, interlocks, sequencers, and dedicated normally locked/unlocked restroom modes.
- Relay 1 offers both DRY and WET output options, enabling direct power to electric strikes or maglocks when properly configured.
- Adjustable hold times, relay delays, and reverse logic allow fine-tuned integration with door hardware and access control systems.
- Compliance, safety wiring practices, and correct jumper settings are critical to reliable long-term performance.
Why Advanced Restroom Control Requires More Than a Lock
Single-occupancy restrooms in commercial environments are deceptively complex. Beyond a simple lock, these openings must coordinate:
Electric locking hardware
Door position switches
Occupancy indicators
Emergency assistance signaling
Code-compliant safety glazing and door operation
The BR3-X programmable 3-relay logic module is designed specifically to manage this coordination within a compact, configurable control platform.
For architects, glazing contractors, and entrance system integrators, understanding how these logic modules function is essential when specifying doors that combine privacy, accessibility, and life safety.
Core Architecture: Inputs, Relays, and Configurable Logic
The BR3-X operates on 12–24 VAC/VDC and provides three relay outputs along with multiple configurable inputs, including WET and DRY options.
Its functionality is organized around programmable logic modes. Available functions include:
Timer (10)
Ratchet / latching (11)
2-relay sequencers with inhibitor or door position logic (22, 28, 29)
3-relay sequencers, including “1-shot” and independent relay modes (36, 37)
Interlock timer and interlock latching (50, 55)
2-way sequencing (65)
Normally locked (nL) and normally unlocked (nU) restroom configurations
Day/Night mode sequencing (dN)
This breadth of configuration allows a single module to serve multiple door hardware strategies without changing core components.
Normally Locked vs. Normally Unlocked Restroom Logic
Two of the most relevant configurations for commercial restroom applications are:
nL – Normally Locked Restroom
nU – Normally Unlocked Restroom
In normally locked mode, relay sequencing controls the lock, door activation, and occupied indicator, with logic that inhibits certain inputs based on door position.
In normally unlocked mode, the sequence shifts to prioritize open access while still coordinating lock engagement and occupancy indication when activated.
The distinction affects hardware selection, user experience, and compliance strategy. In healthcare or high-traffic retail settings, these logic differences materially impact safety and accessibility outcomes.
WET vs. DRY Outputs: Why It Matters for Door Hardware
Relay 1 can be configured as either:
DRY output (default setting)
WET output (supplies voltage directly to the load)
The WET output allows the module to power electric strikes or maglocks directly—up to 1 amp—provided jumper settings and supply voltage are correctly configured.
However, improper jumper configuration or connecting multiple voltage sources to the same load can permanently damage equipment.
From a systems perspective, this reinforces the importance of coordination between the door fabricator, electrical contractor, and hardware supplier.
Programmability and Timing Control
Each relay can be assigned hold times (h1, h2, h3) ranging from 0–60 seconds. Delays between relays (d1, d2) can also be configured, allowing staged door and indicator responses.
For example:
Relay 1 may energize the lock.
Relay 2 may activate door control after a delay.
Relay 3 may illuminate an occupied indicator.
Reverse logic options allow adaptation for normally closed or normally open trigger devices.
This level of timing precision is especially useful when integrating door position switches and ensuring electric locks release and re-engage in proper sequence.
Safety, Code, and Installation Considerations
The documentation emphasizes that installation must comply with applicable safety standards such as ANSI A156.10 and that risk assessment remains the responsibility of the door system installer.
Additional precautions include:
Power isolation before wiring
Correct jumper placement prior to energizing
Avoiding simultaneous voltage sources on loads
Ensuring relay current limits are not exceeded
In high-traffic commercial settings, improper wiring does not just risk equipment damage—it can compromise door safety and code compliance.
Practical Implications for Commercial Entrance Systems
While restroom control modules are often viewed as electrical accessories, their operation directly affects:
Lock preparation in aluminum entrance doors
Hardware reinforcement requirements
Glass selection when indicators or emergency devices are integrated
Frame preparation for door position switches
For glazing professionals and door fabricators, early awareness of the intended control logic avoids last-minute modifications to rails, stiles, or lite configurations.
In complex commercial environments, the door is no longer a passive assembly—it is part of an integrated control system.
Closing Perspective
As commercial buildings demand higher standards of privacy, accessibility, and safety, programmable logic modules like the BR3-X illustrate how entrance systems are evolving beyond basic hardware coordination.
For professionals specifying and fabricating aluminum and glass entrance doors, understanding how control logic interacts with locking hardware, door position monitoring, and occupancy indication is critical. Precision in both physical construction and electronic integration defines the difference between a compliant, reliable installation and one that requires ongoing adjustment.
At Cypress Door Glass, expertise in door construction goes hand-in-hand with understanding how modern control systems integrate into real-world commercial applications.
