The LD140 counts vehicles as they move over the loop and keeps its value in the event of a power failure, the counter has a maximum count of 999999. The diagnostic capabilities enable you to quickly check loop inductance, loop faults and set the sensitivity very accurately ensuring no false triggers.
The LD140 Series Loop Detectors include the following features:
- Selectable detect sensitivity
- Automatic sensitivity boost option
- Filter timer and extend timer
- Selectable pulse time
- Relay 2 mode—Pulse on detect, pulse on undetect, presence or loop fault.
- Presence mode—Permanent or limited
- Selectable fail-safe / Fail secure operation
- Adjustable loop frequency
- Power fail memory
For more information download our product datasheet.
| Specification |
LD140 |
LD142 |
| Power Requirement |
240vac |
12/24vac/dc |
| Presence Relay 1 |
Change over contact 0.5A / 220vac:
- (Failsafe – normally energised)
- (Fail secure – normally de-energised)
|
| Presence Relay 2 |
Change over contact 0.5A / 220vac:
- (Pulse on detect – normally de-energised)
- (Pulse on undetect – normally de-energised)
- (Presence mode – normally de-energised)
- (Loop fault mode – normally energised)
|
| Response Time |
Default approximately 120ms after the vehicle enters loop.
Adjustable 50ms to 9.00 seconds |
| Indicators |
LED indicators show: detect state |
| Detector Tuning Range |
15—1500uH |
| Loop Frequency |
Approx. 23 -130 KHz |
| Power Fail Memory |
20 Seconds |
| Environmental Tracking |
Automatic Compensation |
| Protection |
Loop isolation transformer with zener diodes and gas discharge tube. |
| Connector |
11 Pin connector on the rear of the unit. |
| Operating Temperature |
-20°C to 70°C |
For more information download our product datasheet.
