Short Range Sensor (M75-VPR27-0015)

Part Number: M75-VPR27-0015

MUTCD Sign Rings: If your controller is running firmware 401N or >, adjust brightness from 100% to 60%. Failure to do so will result in higher power draw and solar systems may fail.

Is my ring MUTCD?
There is a -M at the end of the model number for MUTCD compliant rings

M75-VPR27-0015 Datasheet

Summary

The Short Range Sensor activates TraffiCalm flashing crossing systems when motion occurs within a defined approach area. The device monitors the sidewalk or trail approach and sends an activation signal to the controller through a contact-closure input.

The sensor operates automatically and does not require push-button interaction. Event-based activation reduces unnecessary flashing operation and lowers system power usage compared to continuously operating warning devices.

Specifications

Detection

• Doppler microwave motion sensing
• Operating frequency: 24 GHz band
• Detection modes: approach, depart, or bi-directional
• Typical detection range:
  • Up to approximately 60 ft (human-scale movement)
  • Up to approximately 80 ft (bicycle or larger movement)
• Beam angle:
  • ~18° horizontal
  • ~9° vertical
• Typical response time: 0.2 seconds

The sensor detects motion within the configured zone and provides a relay contact closure to the controller.

Electrical Interface

• Operating voltage: 12–24 VAC or DC
• Current consumption: ~75 mA
• Output: relay contact closure
• Contact type: Form A (Normally-Open)
• Interface: dry contact activation input
• Isolation: no voltage provided by the sensor

When motion is detected, the relay closes and initiates the flashing sequence.

Compatibility

• Compatible with TraffiCalm flashing sign controllers
• Functions as a standard activation input device

Environmental

• Outdoor field device enclosure
• Operating temperature: −35 °F to 165 °F (−37 °C to +75 °C)

Physical Description

• Pole-mount bracket
• Dimensions: approximately 7.5 in × 6 in × 5.5 in
• Weight: approximately 1.55 lb
• Integrated 15 ft harness
• Recommended mounting height: 10–20 ft above grade

Adjustable Parameters

• Detection range
• Detection direction (approach / depart / bi-directional)
• Relay hold time (0.25–25 seconds)

Warranty

• 5-year limited warranty
• Unlimited U.S.-based technical support

Operational Note

This device detects motion within a configured zone and is not a user-classification detector. Activation may occur from any movement within the detection area. Proper aiming is required.

Why Use the Short Range Sensor?

• Automatic activation without push buttons
• Reduces nuisance flashing
• Improves solar system runtime
• Suitable for shared-use paths and passive crossings
• Integrates directly with TraffiCalm controllers