Table of Contents
Guardian Duo Datasheet
Guardian Duo is a two-wire APS system providing audible and vibrotactile crossing info to pedestrians at signalized intersections using existing field wiring for simplified installation.


Product Overview
The Guardian Duo is a two-wire Accessible Pedestrian Signal (APS) system designed to provide audible and vibrotactile crossing information to pedestrians at signalized intersections. The system utilizes existing field wiring between the traffic cabinet and push button stations, allowing simplified installation while maintaining full accessibility functionality.
Guardian Duo stations provide locator tones, audible walk messages, and vibrotactile feedback to assist pedestrians with visual impairments. The system can be configured using the PedConnex utility via Bluetooth or USB-C connection.
The Guardian Duo system consists of three primary components:
• Guardian Duo Accessible Push Button (APB)
• Duo Controller
• Duo Power Supply
Key Features
• Two-wire APS communication using existing field wiring
• Audible walk indications and locator tones
• Vibrotactile walk feedback
• Bluetooth configuration capability
• USB-C configuration capability
• Automatic station discovery and phasing
• Ethernet monitoring capability
• Support for up to 16 APS stations per controller
Technical Specifications
Guardian Duo Accessible Push Button
Operating Voltage
• 12–24 VDC (15 VDC nominal)
Power Consumption
• 3 W maximum
Operating Temperature
• −34°C to +74°C
Storage Temperature
• −40°C to +85°C
Push Button Force
• 2 lb typical
Switch Life
• Greater than 25 million activations
Maximum Audio Output
• 100 dBA at 1 meter
Dimensions
• 13.26 in × 4.98 in × 2.35 in
Weight
• 4.0 lb
Duo Controller
Operating Voltage
• 16 VDC nominal
Power Consumption
• 5 W maximum
Channels
• 4
Maximum Stations
• 16 (4 per channel)
Monitoring Interface
• Ethernet web interface and SNMP monitoring
Dimensions
• 4.5 in × 2.40 in × 8.004 in
Weight
• 0.7 lb
Duo Power Supply
Input Voltage
• 89–134 VAC
Output Voltage
• 16 VDC nominal
Output Power
• 40 W maximum
Dimensions
• 7 in × 3.25 in × 2.25 in
Weight
• 1.32 lb
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