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China Loop Detector USER MANUAL Version 1.00 1. INTRODUCTION Dual channel vehicle loop detector based detector designed specifically for parking and vehicle access control applications. The primary function of the detector is to detect vehicle presence by means of an inductance change caused by the vehicle passing over a wire loop buried under the road surface. The various modes are selected by changing the position of switches on the front of the unit. The detector oscillator is multiplexed to eliminate any possibility of crosstalk between the loops connected to the detector. The switches allow for different loop frequency settings, sensitivity settings and modesettings. The unit has a number of initial selectable options for configuration of the relay outputs. The PD-230 provides visual outputs ( LED ) on the front of the enclosure and relay change-over contacts at the 11 pin connector at the rear of the enclosure. The power LED indicates that the unit has been powered.  It should be noted that the loop sensitivity decreases as the feeder length increases, so ideally thefeeder cable should be kept as short as possible. The loops are sealed using a 鈥渜uick-set鈥?black epoxy compound or hot bitumen mastic to blend with the roadway surface. 6. CONFIGURATION 6.1 PD-231 Detector CONNECTOR PIN DESIGNATION 1 Live 120V AC input 2 Neutral 卤15% 50/60 Hz 3 Channel 2 Common 4 No Use 5 Channel 1 Common 6 Channel 1 N/O 7 Channel 1 loop Twist 8 Channel 1 loop this pair 9 Channel 2 loop Twist 10 Channel 2 loop this pair 11 Channel 2 N/O 6.2 PD-232 Detector CONNECTOR PIN DESIGNATION 1 Live 230V AC input 2 Neutral 卤15% 50/60 Hz 3 Channel 2 Common 4 No Use 5 Channel 1 Common 6 Channel 1 N/O 7 Channel 1 loop Twist 8 Channel 1 loop this pair 9 Channel 2 loop Twist 10 Channel 2 loop this pair 11 Channel 2 N/O 6.3 PD-234 Detector CONNECTOR PIN DESIGNATION 1 Live 12-24V input 2 Neutral AC/DC 3 Channel 2 Common 4 No Use 5 Channel 1 Common 6 Channel 1 N/O 7 Channel 1 loop Twist 8 Channel 1 loop this pair 9 Channel 2 loop Twist 10 Channel 2 loop this pair 11 Channel 2 N/OChina Loop Detector website:http://www.ilead-time.com/loop-detector/