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- TD424 (Ch4 Card Detector)
Product Description
High Performance Traffic Detector
The TD424 series of 4 channel microprocessor based traffic detectors with Eurocard OR ANSI/NEMA Standard TS1, Part 15 connectors having discrete detector outputs, Logic outputs as well as having the option to have a serial link for communication to a host device.
The detector has been designed for ease of operation and parameters can be individually set for each channel. The TD424 is a Presence Detector providing a continuous output while a vehicle is present in the detection zone.
Applications
- Traffic counting
- Stopline detection
- Queue detection
- Vehicle actuated traffic control
Features of the TD424
- Configuration: Four channel detector for rack mounting and powered from an external source
- Front end type: Multi-channel, single multiplexed oscillator, employing sequential channel sampling
- Detection method: Microprocessor controlled by monitoring loop oscillator frequency changes resulting from loop inductance variation due the presence of motor vehicles
- Format: Eurocard OR NEMA size with front panel accessed 2 x 8-way DIL switches and visual indicators
- Optional Auto-retune: The detector will retune following a step inductance change greater than 15% of the current value
Technical Data
Download Specification:
Self-Tuning Range:
20 - 1000μH
Sensitivity:
Four step adjustable on faceplate:
- High - 0.02% ∆ L/L
- Med-High - 0.05% ∆ L/L
- Med-Low - 0.1% ∆ L/L
- Low - 0.5% ∆ L/L
Frequency:
Four step selectable on PCB:
- High
- Medium-High
- Medium-Low
- Low
Output Configuration:
One opto-isolated presence output per channel
Presence Time:
Four step adjustable on faceplate:
- 3.5 secs
- 4 mins (Optional 8 mins)
- 40 mins
- Infinity – no fixed time-out
Indications:
The following indications are provided:
2 x LED per channel
2 x LED per channel
- 1 x Red – Detect
- 1 x Red – Fault
Protection:
Loop isolation transformers, zener diode clamping on loop inputs and gas discharge tube protection.
Power Requirements:
24V DC
Detect outputs:
Sealed relays rated at 1A @ 220V AC
Single change-over contact per channel
Opto-isolated rated at 50mA @ 50V DC (optional)
Single change-over contact per channel
Opto-isolated rated at 50mA @ 50V DC (optional)
Operating Temp Range:
-40 °C to + 85 °C (Circuit conformal coated)
Dimensions:
160 mm (l) x 100 mm (h) x 25mm (w)
Connector:
2 x 32 way DIN 41612 type C connector
Static Response Times:
Turn on 40mS ± 7mS
Turn off 45mS ± 7mS
Turn off 45mS ± 7mS
Mechanical Details:
Standard Eurocard with Relay Outputs OR
Standard Eurocard with Serial Outputs
Standard Eurocard with Serial Outputs
Fault Outputs:
-
Output Opto-Couplers:
-
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