STI SS2429AB-EN Push Button Station with Shield
Overview
The SS2429AB-EN is a push-button station designed for emergency access and controlled egress in access control systems where 30VDC magnetic lock strikes are deployed. It combines a momentary push button with an integrated Stopper® Station Shield — a weatherproof protective enclosure — and mounts flush or surface-mount into standard door frames measuring 6.36 inches wide by 3.22 inches high. The unit operates at 30VDC, making it compatible with standard magnetic lock strike architectures. This is a core component for integrators specifying push-to-exit or emergency-release functionality in retail, commercial, or secure facility environments.
Key Features
- 30VDC operating voltage: Direct compatibility with magnetic lock strike systems — no voltage conversion or intermediate relay required. Simplifies wiring and reduces points of failure in the egress circuit.
- Integrated Stopper Station Shield: Weatherproof protective enclosure prevents accidental activation and protects the button mechanism from dust, debris, and moisture. Critical for high-traffic or outdoor-facing egress points where button durability affects uptime.
- N.O. and N.C. contact configuration: Dual-contact design allows both fail-safe (normally open to energize lock) and fail-secure (normally closed to de-energize lock) wiring strategies. Gives you flexibility in how the button integrates with your access control logic.
- 12–24VAC/VDC LED support: Optional LED indicator can be powered from the access control panel's auxiliary output, giving users visual feedback that the button press was registered — particularly useful in noisy environments or when exit delay timers are active.
- 6.36 × 3.22 inch footprint: Standard ADA-compliant reach height and button spacing. Fits existing door-frame cutouts without modification in retrofit installations, reducing installation labor and door prep time.
- Mounting depth approximately 1.25 inches (without anchors): Shallow profile reduces frame routing depth, making it suitable for retrofit into doors with thin stiles. The standard KIT-102720 12mm mounting plate/spacer ensures consistent setback from the frame face.
Integration & Compatibility
The SS2429AB-EN integrates into access control installations requiring push-to-exit, emergency-release, or controlled egress buttons. Its N.O. and N.C. contacts wire directly into access control panel logic — typically a monitored egress input that triggers a time-delayed mag-lock release or an unmonitored emergency circuit that bypasses access control entirely (code-dependent). Mounting requires two 3/16-inch diameter holes at specified locations. Standard flush-mount installation uses KIT-102720 (12mm mounting plate/spacer), included with the unit. For surface-mount applications, KIT-71100A replaces the flush kit. Extended-depth installations requiring KIT-71101B are available when additional setback from the frame face is needed — useful in retrofit scenarios where the door frame is recessed or when surface-mounted locks need clearance.
Installation & Commissioning Notes
Verify 30VDC power availability at the installation point before drilling and mounting. Drill 3/16-inch diameter holes at template-marked locations (template included in mounting kit). Mount flush using KIT-102720 or surface-mount using KIT-71100A — do not mix kits. Secure the unit with anchors appropriate to the door material (wood screws for wood frames, toggle bolts for metal frames). Test both N.O. and N.C. contacts with a multimeter before final power-up to confirm continuity. If using the LED indicator, source 12–24VAC/VDC from an auxiliary output on the access control panel; do not steal power from the strike circuit itself.
What's in the Box
- 1x SS2429AB-EN push button with Stopper Station Shield
- 1x KIT-102720 mounting plate/spacer (12mm)
Frequently Asked Questions
Q: Can the SS2429AB-EN be used for fail-safe or fail-secure egress?
A: Yes. The dual N.O. and N.C. contacts support both strategies. For fail-safe egress, wire the N.C. contact so that a button press de-energizes the magnetic lock. For fail-secure egress, wire the N.O. contact so that a button press energizes a relay that controls lock release. Check your local fire and life-safety code before final installation.
Q: Does the SS2429AB-EN require a separate power supply?
A: No. The unit operates directly from a 30VDC access control panel output or mag-lock strike circuit. If you want to add an LED indicator, source 12–24VAC/VDC from an auxiliary output; the button itself draws no separate supply.
Q: What mounting kits are available for the SS2429AB-EN?
A: The standard flush-mount kit (KIT-102720, 12mm spacer) is included. For surface-mount applications, use KIT-71100A. For deeper setback (retrofit or lock-clearance scenarios), KIT-71101B is available separately.
Q: Is the SS2429AB-EN suitable for outdoor or high-moisture environments?
A: The integrated Stopper Station Shield provides weather protection, but this unit is designed primarily for interior egress points. If the button faces direct rainfall or salt spray, consult STI's technical support to confirm environmental ratings for your specific climate zone.
Q: What is the warranty on the SS2429AB-EN?
A: Manufacturer warranty details are available from the distributor or STI directly. Confirm warranty terms and coverage before purchase.
Q: How do I wire the LED indicator on the SS2429AB-EN?
A: The LED accepts 12–24VAC/VDC. Source power from an auxiliary output on your access control panel, not from the strike circuit. Route the LED leads separately from high-current strike wiring to avoid noise coupling into the access control system.
I specify the SS2429AB-EN for any retrofit or new-build egress point where a magnetic lock strike is the core security control. The 30VDC direct-drive design means no intermediate relay or voltage converter — you wire it straight from your panel output to the mag lock, and the N.O./N.C. contacts give you both fail-safe and fail-secure options within a single device. The integrated Stopper shield is the real value here; it keeps accidental presses and weather out of the mechanism, which matters in high-traffic areas where button reliability directly affects fire-code compliance.
Technical Highlights:
- 30VDC direct strike compatibility: No separate power supply or voltage regulation required. Simplifies panel wiring and reduces the risk of a failed relay taking down your entire egress circuit.
- Dual N.O./N.C. contacts: Single device supports both fail-safe (button press de-energizes lock) and fail-secure (button press energizes relay) logic — no need to stock two variants for different code jurisdictions.
- Stopper Station Shield weatherproofing: Protects the button mechanism from debris and moisture. In a busy retail environment or warehouse loading dock where egress buttons get heavy use, this reduces maintenance calls and button replacement frequency.
- 6.36 × 3.22 inch standard footprint: ADA-compliant reach height and spacing. Fits existing door cutouts in retrofit — no frame modification or oversized router work required.
- 12–24VAC/VDC LED support: Optional visual feedback for users or supervisory monitoring. Particularly useful in noisy spaces or when exit delays are active, so people know the press registered.
Deployment Considerations:
- Verify 30VDC availability at your panel output before committing to the installation. If your panel maxes out at 24VDC, this unit won't work — confirm strike voltage in your design drawings.
- The mounting depth is shallow (1.25 inches without anchors), which is great for retrofit, but if you're using a surface-mounted mag lock with a thick armature, you may need KIT-71101B for additional clearance. Measure twice before drilling.
- The N.C. contact is your fail-safe path — if the access control system loses power, the button press alone de-energizes the lock and allows egress. Make sure your fire marshal understands this circuit architecture during inspections; some jurisdictions have specific wiring requirements for emergency egress that your design must satisfy.
Deploy this in corporate office suites with individual suite egress, data-center server rooms where physical access is restricted but emergency exit must always be available, or retail environments where you need a clean, tamper-resistant push-to-exit button. The SS2429AB-EN (often searched as SS2429AB EN without the hyphen) is solid for any 30VDC magnetic lock installation where durability and code compliance matter more than lowest cost.
