Products : Traffic

TD250 Dual Channel Detectors

The TD250 series reliable microprocessor based vehicle detectors have the same performance characteristics as found on TDE. Nortech Eurocard traffic detectors.
This comprehensive range of boxed dual channel detectors is packaged according to industry standards and is ideal for use in traffic control and toll equipment vehicle detection applications.
The TD250, while providing separate vehicle presence outputs per channel, may also be configured to operate as a DIRECTION LOGIC detector or in a DELAY/EXTEND mode. A SPEED/HEADWAY logic version is also available (TD250L)

APPLICATIONS

· Traffic Control Applications
· Toll Systems
· Vehicle Counting
· Traffic Analysis

FEATURES

· Diagnostic Capabilities:

The software of this unit allows comprehensive diagnostics capabilities in conjunction with separate DU100 hand-held diagnostics readout. Advanced diagnostics features are covered by S.A. PAT APPLN 93/5634

· Loop Isolation Protection:

The loop isolation transformer provides protection against lightning and transient damage and allows
for operation with single point to ground sensor loops.

· Loop Fault Monitor:

The fault monitor signal becomes active in the event of the loop/feeder combination becoming faulty, and will assist in maintenance call-outs.

· Delay Mode:

The vehicle must be present for a pre-set time before the detector will operate.

· Extend Mode:

In this mode the detector output responds immediately to a vehicle's presence and remains for the selected time after a vehicle has departed the loop.

Using the TD250L for Traffic Calming

Technical Data TD 250


Self-tuning Range:	15 – 2000 µH
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 adjustable on faceplate 10-150 kHz (Frequency determined by loop geometry)
Output Configuration:	2 Detect Output relays: Relay 1=Presence output Direction A - B (option) Relay 2 = Presence output Direction B - A (option) Delay turn-on (option) Extend (option) Speed logic (TD250L) Headway logic (TD250L)
Presence Time:	Four step adjustable on faceplate: 1 second / 4 minutes / 40 minutes / Limited
Operating Modes:	Four position mode selector on faceplate: 1 = Normal presence 2 = Direction logic 3 = Delay (Speed-Model TD250L) 4 = Extend (Headway - Model TD250L)
Fault Outputs:	Common fault monitor output relay operates under the following conditions: 1 = Loop short / open circuit 2 = Detector / power fault
Indications:	The following faceplate indications are provided: 1 Red Power indicator 1 Tri-colour LED per channel Green - detect Red - fault Orange - indicates delay/extend
Protection:	Loop isolation transformers, zener diode clamping on loop inputs and gas discharge tube protection.
Power Requirements:	230V AC (+ 15%) 48 -60 Kz - TD252 and TD250L - 24V DC (+ 15%) - TD254 150mA max input current
Output Relays:	1A @ 230V AC - Change-over contact per channel Presence relays are fail-safe Fault - 1 A @ 230V - Common N/0 relay contacts - fail-safe
Operating Temp Range:	-40°C to +70°C (Circuit sealed against condensation)
Mechanical Details :
Material:	ABS Blend
Dimensions:	113mm (high) x 56mm (wide) x 127mm (deep)
Connector:	Dual rear mount 11-pin submagnal(86CP11)
Mounting Position :	Shelf
Accessories:	All flying leads supplied