SDC MD-31D Series Request-to-Exit PIR Motion Sensor with Dual Voltage Auto-Sensing

SDC MD-31D Series Request-to-Exit PIR Motion Sensor with Dual Voltage Auto-Sensing

Code-Compliant Passive Infrared Detection for Access-Controlled Egress Doors

The SDC MD-31D series motion sensor is a passive infrared detector specifically engineered for request-to-exit applications on access-controlled egress doors. This compact 7"; x 1-3/4"; x 1-7/8"; unit features auto-sensing dual voltage operation at 12VAC or 24VAC with an internally pointable coverage field that provides 5' x 6' coverage at 7' height or 10' x 12' coverage at 15' height when angled 14 degrees down. The MD-31D projects a wraparound ";U"; pattern down and away from the door to inhibit tampering while ensuring reliable detection for code compliance.

Professional Features & Benefits

• Adjustable Coverage Field: Internally pointable detection provides 5' x 6' coverage at 7' height or 10' x 12' coverage at 15' height when angled 14 degrees down for flexible installation options.
• Auto-Sensing Dual Voltage: Operates on both 12VAC and 24VAC systems with automatic voltage detection for versatile system integration.
• Tamper-Resistant Design: Wraparound ";U"; pattern projects down and away from the door to inhibit tampering while maintaining reliable detection.
• Code Compliance Certified: Meets IBC 1008.1.3.4, IFC 1008.1.3.4, NFPA 101 7.2.1.6.2, NFPA 1.15.5.3.2, BOCA 1017.4.5, and SBCCI 1012.7 requirements for access-controlled egress doors.
• Relock Time Delay Function: Built-in RTD feature provides controlled timing for secure re-engagement after exit detection.
• Versatile Mounting Options: Frame header, wall, or ceiling mount configurations accommodate various installation requirements.
• Failsafe Operation: Code-compliant failsafe mode ensures proper egress functionality during power interruption (MD-31DOW variant).
• Wide Temperature Range: Operates reliably from -20°F to 120°F for demanding environmental conditions.

Technical Specifications

• Commercial/Residential: Commercial
• Department: Door Hardware
• Electronic: Yes
• PDF:SDC Full Catalog: https://zensupply.com/content/pdf/lcn/CondensedHardwareBrochure
• Product Category: Electronic Access Controls
• Product Dimension: 7"; x 13/4"; x 17/8";
• Product Group: Electronic Access Controls
• Product Model: MD-31D
• Product Subgroup: Sensors, Switches, Relays and Timers
• Product Substrate: Plastic
• Product Type: Motion Sensors
• Product Voltage: 12VAC, 24VAC
• Series: MD-31 Series
• Subcategory: Motion Sensors
• Temperature Range: Minus 20 Degrees F to 120 Degrees F

Professional Applications

• Commercial Building Security Systems
• Healthcare Facility Access Control
• Educational Institution Safety Systems
• Industrial Facility Monitoring
• Government and Municipal Buildings
• Emergency Exit Compliance
• Multi-Tenant Residential Properties

Why Choose SDC Quality?

SDC MD-31D series motion sensors deliver professional-grade reliability with passive infrared detection technology rated for operation from -20°F to 120°F in demanding commercial applications. Certified compliance with IBC, IFC, NFPA, BOCA, and SBCCI building codes ensures proper egress functionality while auto-sensing dual voltage operation provides flexible system integration. Engineered for demanding access control applications where dependable code-compliant performance is essential.