STI (SS2408XT-EN) Pneumatic Illuminated ; BLUE ; EXIT

The STI SS2408XT-EN is a blue, no-cover, pneumatic, illuminated Stopper Station with an “EXIT” label in English. First, an occupant presses the illuminated push button. Then the integrated pneumatic timer holds the contact state for a programmed delay before automatically resetting. As a result, the connected access-control or door-release system processes the egress request with no electrical reset signal required.

What the STI SS2408XT-EN is built for

Delayed-egress doors and access-controlled exits need an occupant-initiated request the controller can recognize. However, a momentary contact resets the instant the occupant lets go — too short for many door controllers. Therefore, the SS2408XT-EN uses an adjustable pneumatic timer to hold the switch state for a programmed interval, then return to standby without consuming power for the timing function.

Verified STI SS2408XT-EN specifications

• Series: STI Stopper Station SS2000 family — SS2408 base = blue, no cover, pneumatic-timer reset, illuminated
• Color: Blue — STI’s standard color for egress / exit request controls in many access-control installations
• Activation: Push button with integrated LED illumination
• Reset: Pneumatic timer; field-adjustable 2–60 seconds (±15%); no electricity required for the timing function
• Mounting: No cover (open station); flush or surface mount
• Label: “EXIT” in English
• Contacts: Interchangeable N.O. or N.C. SPST gold-plated contact blocks; holds up to three sets of isolated contacts
• Contact rating: 6 A @ 600 VAC; 1 A @ 250 VDC
• Listing: UL Listed to U.S. and Canadian safety standards; complies with UL 2017
• Material: Polycarbonate with stainless steel backplate; 5VA flammability rating
• Operating range: Polycarbonate working properties -40° to 250°F (-40° to 121°C)
• Compliance: ADA Compliant push button
• Warranty: Three-year guarantee against polycarbonate breakage in normal use; one year on electro-mechanical and electronic components

Where SS2408XT-EN fits in the SS2408 family

The SS2408 base is the blue, no-cover, pneumatic-timer platform. Specifically, the XT suffix means EXIT; EX is EMERGENCY EXIT; PX is PUSH TO EXIT. Furthermore, the SS2428XT-EN sibling adds an indoor flush-or-surface cover (vs. no cover) for installations where vandalism is a concern. As a result, the SS2408XT-EN is the cover-less, blue, pneumatic EXIT variant.

Why pneumatic vs. electrical reset

Pneumatic-timer Stopper Stations need no electricity for the timing function. In addition, the field-adjustable timer lets installers tune the hold interval to the door controller. Alternatively, the SS2X09 turn-to-reset stations require physical operator rotation to clear; specify those when manual reset is desired. Furthermore, key-to-reset variants latch until an authorized operator unlocks them.

Application context

Access-controlled egress in retail, healthcare, and managed entries is the typical use case. However, the SS2408XT-EN ships without a protective cover — for high-traffic or public-access installations, specify the SS2428XT-EN with the universal indoor cover. Also, this station is not a fire alarm pull station and is not UL Listed for fire alarm initiating-device service.

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