Description

The CAME loop controller series, most notably the SMA (Single Channel) and SMA2 (Dual Channel), are professional-grade inductive vehicle detectors designed for automated gates, barriers, and bollards. They work by monitoring the resonance of a buried wire loop to detect the presence of metal objects, such as vehicles.

Core CAME Loop Detector Models

Model	Type	Best For
CAME SMA	Single Channel	Standard exit or safety loops at gate/barrier entrances.
CAME SMA2	Dual Channel	Complex installations requiring two separate detection zones (e.g., safety + activation).

Key Features

• Precision Tuning: Both models feature multi-level sensitivity adjustments (typically 9 levels), allowing you to fine-tune detection so the system ignores small metal objects while reliably catching cars, trucks, or trailers.

• Frequency Selection: Multiple selectable operating frequencies allow you to install adjacent loops without signal interference (cross-talk).

• Advanced Logic: Includes features like:

  • Automatic Sensitivity Boost (ASB): Helps detect high-bed vehicles or those with drawbars.

  • Time Functions: Supports switch-on/off delays and “presence” modes where the signal stays active as long as the vehicle is over the loop.

• Ease of Installation: DIN rail mounting makes them standard for control cabinet integration. They feature clear LCD displays and configuration buttons for quick setup.

• Fail-Safe/Fail-Secure: Options available to ensure your gate remains secure or opens automatically in the event of a power failure or loop fault.

How They Work

1. Inductive Loop: A copper wire is installed beneath the road surface (usually in a rectangular “saw-cut” or buried in a pipe/duct).

2. Magnetic Field: The CAME controller sends electricity through the loop, creating a localized magnetic field.

3. Detection: When a large metal object (your vehicle) enters this field, it changes the inductance (the “resonant frequency”) of the loop.

4. Signal: The controller senses this change and triggers a relay, sending a signal to your gate’s control board to either open the gate or hold it open for safety.