CARLO GAVAZZI Automation Components. Speciﬁcations are subject to change without notice. Illustrations are for example only.

Vehicle detection solution

LD series

Loop detectors

LD series loop detectors are ideal to be used in car access

applications to control barriers, gates, bollards and ticketing

machines.

Loop detectors is the best solution in the market in detecting

vehicles and can be found in carparks, toll gantries, trafﬁc

lights, on the streets, at the entrance/exit of any premises

and in many other places.

LD series loop detectors come with many features that are

designed speciﬁcally to simplify the installation process

and also equipped with diagnostic capability to ease

troubleshooting while providing a reliable and efﬁcient way

of vehicle detection.

Adjustable sensitivity

Loop input inductance: 20 μH to 1000 μH with adjustable

sensitivity via 10 step potentiomenter easily accessible from

the front.

Automatic frequency tuning

Loop frequency is automatically tuned to avoid crosstalk

between adjacent loops. If manual tuning is preferred, 4

frequency channels are available and can be easily set via

dip switches.

Automatic sensitivity boost (ASB)

ASB function boosts the loop sensitivity to allow the detection

of high bed vehicles such as trucks, buses and trailers.

Fail secure and fail safe

In case of power loss or loop fault, the conﬁguration of the

output will change to indicate detection (FAIL SAFE) or not

detection (FAIL SECURE) of a vehicle and hence open or

close the gate or barrier.

Wide power supply range

24-240 VAC/VDC rated operational voltage ensures full

ﬂexibility.

Independently conﬁgurable outputs

The loop detectors come with 2 x SPDT outputs.

Each output is conﬁgurable independently and can be

conﬁgured in pulse or presence mode. The pulse length

and presence duration can also be set as well as whether

pulse during entrance or exit of the loop. Independently

conﬁguring the 2 outputs provide great ﬂexibility to meet

different installation requirements.

Directional logic

Using the dual loop version, the direction of the vehicle can

be ascertained via the directional logic function. Relay will

activate accordingly to the vehicle direction.

Multicolour LED for easy diagnostic

Multicolor LEDs will indicate different colors depending on

the status of the loop detector and of the 2 relay outputs.

The Loop LED will indicate the loop status such as inductance

too low or too high, loop short circuit or open circuit and

many others. This makes the troubleshooting process easy,

and enables constant monitoring of the loop health.