VEK MNH Operating Manual v1.3 en
Facilities with high switching frequency
The use of detectors with digital outputs is recommended for facilities with a high switching frequency. Due
to a more limited switching cycle, the operational life of relay contacts is reduced.
6.2 Product characteristics
The traffic detectors have the following properties:
• 1 loop channel (single-channel variants) or 2 loop channels (dual-channel variants)
• 2 potential-free relay outputs with changeover contact (R24 variants)
• 4 open collector outputs (O24 variants)
• 8-pole DIP switch for configuration
• 4-pole DIP switch for advanced configuration
• 2 or 4 LEDs for the indication of detector and loop states
• USB interface for diagnostics and advanced configuration
• Connection for power supply (AC/DC)
• Galvanic isolation between loops and electronics
• Automatic adjustment of the device after switch-on
• Continuous adjustment of frequency drifts to suppress environmental influences
• Sensitivity independent of loop inductance
• Fixed hold times regardless of the loop coverage
• Direction detection based on two loop channels (dual-channel variants)
• Multiplexing prevents mutual interferences of the loop channels (dual-channel variants)
• Compact plastic housing for mounting on DIN rail in control cabinet
6.3 Product functions
The traffic detectors offer the following setting options:
• Switching between two frequency levels
• Output as presence or pulse signal or of loop faults (with Detector Tool)
• Response threshold adjustable in 255 steps with Detector Tool, in 4 steps with DIP switch
• Hold time adjustable from 1 to 255 minutes and infinite with Detector Tool, 5 minutes or infinite with
DIP switch
• Counter for loop occupation and travel direction with Detector Tool
• Minimum signal duration for output signal with Detector Tool
• Switch-in and switch-off delay adjustable with Detector Tool
• Hysteresis (drop in threshold value) adjustable from 20 - 80% on each channel with Detector Tool
• Detector channels can be switched off with Detector Tool
• Comprehensive diagnostic function with Detector Tool
Advanced functions of the dual-channel variants:
• Output as presence, pulse or direction signal (dual-channel variant) or loop faults (with Detector Tool)
• Selection of direction logic
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