The DSP-222 vehicle detector is on the State of California’s (Cal-Trans) QPL list and has been specifically designed to handle NEMA and type 170 traffic applications.
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.
Off
| 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 |
Off |
On |
Off |
.16 |
2 |
| 4 |
On |
On |
Off |
.08 |
4 |
| 5 |
Off |
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 be a 125 ms pulse each time a vehicle enters the loop detection area. 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 Off 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
NEMA – TS-2: TS-2 outputs are included on Pins 7 (Channel 1) and Pin 20 (Channel 2)
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 – 1.12” (2.84 cm)
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
Connector: Standard 2 x 22 pin edge card connector with key slots located between B & C and M & N.
Pin assignments are listed below:
A DC (-) Common
B DC (+) Power
C Reset
D Loop 1
E Loop 1
F Output 1 Collector
H Output 1 Emitter
J Loop 2
K Loop 2
L Chassis Ground
M – V No Connection
W Output 2 Collector
X Output 2 Emitter
Y – Z No Connection
