Loop detectors

LD250/450/850 SERIES

2/4/8 CHANNEL VEHICLE LOOP DETECTORS

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The LD250/450/850 are Nema Card multi-channel inductive loop detectors. The detectors are pinout compatible with most Nema Card detectors on the market and are easy to set-up and install. Optional features include a RS485 communications port.

Typical applications in the traffic environment are traffic control (traffic lights), toll systems and vehicle counting.

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 loop and become ready for vehicle detection.
• Presence / Passage Feature
  • Each channel can be individually setup to operate in presence or passage mode.
• Selectable Presence Time
  • Each channel can be individually set up for a presence time of 10 minutes or 1 hour.
• Switch Selectable Sensitivity
  • Eight sensitivity settings are available on the switches to allow flexibility in configuration.

1.	High	0.02%
2.	.	0.03%
3.	.	0.04%
4.	.	0.06%
5.	.	0.08%
6.	.	0.16%
7.	.	0.32%
8.	Low	0.64%

TECHNICAL DATA

1.	Power Requirements	19.6V – 28.8VDC
2.	Presence Relay Output	This output has a normally closed relay contact.
3.	Indicators	LED indicators show: Detect state
4.	Detector Tuning Range	15-1500µH.
5.	Frequency	Two-step adjustable.
6.	Protection	Loop isolation transformer, zener diode and MOV protection on loop input
7.	Connector	2 x 22 Terminal
8.	Dimensions	175mm x 114mm x 25mm
9.	Operations temperature	-40°C to +80°C -40°F to 176°F
10.	Storage temperature	-40°C to +85°C -40°F to 185°F
11.	Humidity	up to 95% non-condensing

To download these specifications in pdf format (16KB) please click the icon.