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FOUR CHANNEL VEHICLE LOOP DETECTOR
The LD400 is a four channel inductive loop detector. The use of microprocessor based technology enables a large number of functions to be incorporated into a small package. Typical applications include safety loops, arming loops and entry or exit loops. Standard features of the detector are :· Reset Switch. The reset switch enables the detector to be manually reset during commissioning and testing. This results in the detector re-tuning the sensing loops and becoming ready for vehicle detection.
· Switch selectable Sensitivity. Eight sensitivity settings are available on the switches to allow flexibility in configuration.
· Pulse Relay Selection. The detect relay may be configured for a pulse output, and to energise on detection of a vehicle or when the vehicle leaves the loop. · Selectable N/O or N/C relay output. Internal jumpers enable the output relay contacts to be configured for normally open or normally closed contacts. · Direction Logic This feature enables the detector to give a pulse output on relay1 for a vehicle traveling from loop1 to loop2 and a pulse output on relay 2 for a vehicle traveling from loop2 to loop1. Loops 3 and 4 operate in the same way. · Loop Fault Indicator. This LED Indicator is illuminated when the loop is either open circuit or short circuit and is used to give a visual indication of a faulty loop. TECHNICAL DATA 1. POWER REQUIREMENT:
2. PRESENCE/PULSE RELAY : 0.5A/220VAC. 3. INDICATOR: LED indicator which shows state of loop detector. 4. DETECTOR TUNING RANGE: 15 - 1500 uH. 5. PROTECTION: Loop isolation transformer with zener diode and MOV. 6. CONNECTOR: 11 Pin Connector on rear of unit. 7. DIMENSIONS: 85mm (HIGH) X 40mm (WIDE) X 79mm (DEEP) 8. OPERATING TEMPERATURE: -40°C to +80°C 9. STORAGE TEMPERATURE: -40°C to +85°C 10. HUMIDITY: up to 95% non condensing 11. Complies with EMC Directive 89/336/EEC and Low Voltage Equipment Directive 73/23/EEC.
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