Site Information

 Loading... Please wait...
  • TD424ES (CH4 Card Detector) - Eurocard with Serial Outputs

TD424 (Ch4 Card Detector)

R4,981.05 excl. tax
Product Part Number:
250.00 Grams
Calculated at checkout

Please contact us if you wish to purchase more than 9 of a particular item – one of our sales team will contact you for our special 10+ pricing.

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.


  • 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
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
Four step selectable on PCB:
  • High
  • Medium-High
  • Medium-Low
  • Low
Frequency dependent on loop per channel
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
The following indications are provided:
2 x LED per channel
  • 1 x Red – Detect
  • 1 x Red – Fault
2 x Timing Status Indicators (Red)2 x Mode Indicators
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)
Operating Temp Range:
-40 °C to + 85 °C (Circuit conformal coated)
160 mm (l) x 100 mm (h) x 25mm (w)
2 x 32 way DIN 41612 type C connector
Static Response Times:
Turn on 40mS ± 7mS
Turn off 45mS ± 7mS
Mechanical Details:
Standard Eurocard with Relay Outputs OR
Standard Eurocard with Serial Outputs
Fault Outputs:

Output Opto-Couplers:

Find Similar Products by Category

Related Products

Customers also viewed