TD234 Dual Channel Inductive Loop Traffic Detector

The TD234 is a dual channel microprocessor based detector designed specifically for traffic control applications. The TD234 has been designed using up-to-date technology in order to meet the requirements of diverse applications with a wide range of configurable options available.
Faster operating characteristics make this unit suitable for motorways vehicle speeds. For general applications with average vehicle speeds below 60km/h , we would recommend the PD272 or PD274.

Product codes

306FT0002 - TD234 Dual Channel 12-24V AC/DC

Self tuning range: 20-1000μH

Sensitivity: Four step adjustable on face-plate
High: 0.02% ΔL/L
Medium High: 0.05% ΔL/L
Medium Low: 0.1% ΔL/L
Low: 0.5% ΔL/L

Frequency: Four step adjustable on face plate, 12- 80kHz (frequency determined by loop geometry)

Output Configuration: 2 outputs (opto isolated solid state)

Response time: Turn on / turn off is 60ms.
Presence time: 4-position Presence selection on faceplate:
1 second
4 minutes
40 minutes or indefinite (Approx. 1hour for 3% ΔL/L)

Output Modes:
1. Presence or pulse outputs independently selectable for CH 1 and CH2
2. Direction logic output – A to B (CH1) & B to A (CH2) pulse or presence outputs
Indications: The following face-plate indications are provided: Red LED – power; Green LED – channel indicator
1. Tuning and detect – on steady
2. Undetect – off
3. Fault – on with short off

Protection: Loop isolation transformer, zener diode clamping on loop inputs and gas discharge tube protection

Power requirements: 12-24V AC/DC ± 15% (Typically 35 m.a.@ 12V)

Operating temperature range: -40ºC to +70ºC

Material: High heat ABS blend

Dimensions: 78(H) x 41(W) x 80(L)mm

Mounting: Shelf or DIN-rail socket

Connector: Single rear mount 11-pin submagnal (JEDEC No. B11-88)

Options: 1 metre flying lead or 11 pin screw terminal Base