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LP21/LP22 Installation instructions en Sensors
4.2 Product characteristics
The traffic detectors have the following properties:
• 1 loop channel (LP21) or 2 loop channels (LP22)
• 2 potential-free relay outputs with changeover contact
• 8-pole DIP switch for configuration
• 4-pole DIP switch for advanced configuration (LP22)
• 2 or 4 LEDs for the indication of detector and loop states
• USB interface
• 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 (LP22)
• Multiplexing prevents mutual interferences of the loop channels (LP22)
• Compact plastic housing for mounting on DIN rail in control cabinet
4.3 Product functions
The traffic detectors offer the following setting options:
• Switching between two frequency levels
• Output as presence or pulse signal or of direction (dual-channel variant LP22)
• Response threshold adjustable in 4 steps with DIP switch
• Hold time adjustable: 5 minutes or infinite with DIP switch
Advanced functions of the dual-channel variants:
• Selection of direction logic
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