Overview


The DSP-224 vehicle detector has been specifically designed to handle all traffic applications.

Working on virtually any size loop, the DSP-224 tunes each channel automatically to the best operating frequency within the selected range. HYPERTRACK software constantly compensates for the changing environmental conditions. The DSP-224’s inherent noise filtering algorithms allow it to work reliably in any electrical situation.

With its easy to understand front panel switches and built-in flexibility the DSP-224 is the most “user friendly” detector on the market today.

Ordering Information


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Features

  • Four channels: Four separate detector channels in a single rack mount detector card.
  • Loop size: Works on in-ground inductive loops from 50 to 2000 microhenries.
  • Fail safe operation: The main solidstate output is configured to output a call whenever the loop circuit has failed.
  • Indicators: Separate “Detect” and “Fault” LEDs for each channel.
  • Sensitivity: Seven sensitivity settings with sensitivity 0 indicating the channel is off.
  • Frequency: Automatically tunes within one of four operating ranges.
  • Main detection output: Factory set to be fail safe and can be programmed to output either presence or pulse.
  • Loop failure: If the loop fails, the fault indicator codes the failure. If the loop recovers, the fault indicator will turn off.
  • Min presence: A minimum presence of 125 ms can be programmed by setting jumper J1 on the PC board. This feature ensures that all presence outputs
  • (even on highspeed arterials) will be at least 125 ms.
  • External reset: The entire detector may be externally reset by holding pin C on the edge connector low for 15 μs.

Application Notes


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The DSP-224 has been designed to handle all traffic applications.

Cut Sheet


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DSP-224– click to download

Instructions & Specs


Sensitivity: Almost all traffic control applications can be handled with sensitivity set at NORMAL (level 4). The sensitivity DIP Switches (S1, S2, and S4) should rarely be moved from NORMAL. However, the Model 222 has seven sensitivity settings varying from a LOW of level 1 to a HIGH of level 7. Sensitivity 0 will disable the channel.

Sensitivity

S1

S2

S3

DL%

Response Time (ms)

0

Off

Off

Off

Off

Off

1

On

Off

Off

.64

0.5

2

Off

On

Off

.32

1

3

On

ON

Off

.16

2

4

Off

Off

On

.08

4

5

On

Off

On

.04

8

6

Off

On

ON

.02

18

7

On

On

On

.01

32

Pulse / Presence: With this switch turned on the main output will output a 125 ms pulse each time a vehicle enters the loop. If the vehicle remains within the loop for two seconds, the detector will automatically retune, making itself ready for the next vehicle to arrive. If this switch is turned off the detector will output presence.

Frequency: One of four operating frequencies can be selected by using the front panel DIP switches: FREQ1 and FREQ2. NOTE: Changing any DIP switch setting automatically resets the detector, which cancels the call output.

Indicators:
The green FAULT LED shows the following status: The red DETECT LED shows the following status:
Normal On Call On
Loop or lead-in open 1 flash/second No Call Off
Loop or lead-in shorted 2 flashes/second
Intermittent loop 3 flashes/second

Status Outputs: On the 224N model, each channel has a NEMA TS-2 output that continuously reflects the channel’s status.

Output Ratings: Solid-State – 50 mA maximum, 30 VDC maximum. All outputs are optically isolated.

Power: 24 VDC, 100 mA maximum

Dimensions: H – 4.5” (11.43 cm) W – 6.875” (17.46 cm) D – 2.24” (5.68 cm)

Connector: Standard 2 x 22 pin edge card connector with key slots located between B & C, E & F and M & N.

1 12  A DC (-) Common n
2 13  A DC (-) Common P Loop 3
3 14 C Reset R Loop 3
4 15 C Reset S Output 3 Collector
5 16 C Reset T Output 3 Emitter
6 17 C Reset U Loop 4
7 Ch 1 TS-2 Statu 18 C Reset  V Loop 4
8 19 J Loop 2 W Output 2 Collector
9 20 K Loop 2  X Output 2 Emitter
10 21 L Chassis Ground Y Output 4 Collector
11 22 Ch 4 TS-2 M  Z Output 4 Emitter

Operating Temperature: -35°F to 165°F (-37°C to74°C)

Storage Temperature: -67°F to 185°F (-55°C to 85°C)

Humidity: 0 to 95% relative