MKN 21
Mobile traffic light.
General description
A pair of mobile traffic lights is used at road construction sites and other road sections when a one-way traffic arrangement is necessary.
Both traffic lights operate independently, with a battery power supply. For lower energy consumption, traffic light heads are assembled from LED diodes. The traffic lights are mutually synchronized via wireless radio-wave communication.
The traffic light operation adjusts automatically according to the traffic density. A microwave radar detector is used as a built-in traffic sensor.
The function parameters may be adjusted through a keyboard and built-in LED display on the spot directly, depending on given circumstances.
Technical data
| Power supply: |
battery, 12V |
|---|---|
| Electronic-circuitry current consumption: |
0,09 A |
| Current consumption (of the A 21N LED-head): |
0,7 A max |
| Transmitter's power: | 100 mW/500 mW |
| Transmitter's current consumption: |
reception: 85mA/ transmission: max 0.5A |
| Transmitting frequency: | in the 439 MHz domain |
| Transition into the yellow-light flashing: |
10,5 V |
| Switching-off of the heads: |
10 V |
| Short-circuit checking of the heads: |
on switching-on |
| Bulb filament checking: |
all the time |
| the length of the roadworks site (m): |
30, 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500. |
|---|---|
| the speed of the vehicles driving by (km/h): |
25, 30, 40, 50, 60 |
| the basic duration of the green light (s): |
7 ÷ 25 |
| the extension of the green light's duration (s): |
4 ÷ 15 |
| maximum duration of the green light (s): |
10 ÷ 180 |
| Fixed duration of the green light A / B (min): |
1 ÷ 30 |
| time at the moment |
|
| the time of switching on the system |
|
| the time of switching off the system |
|
| switching the sensor off/on |
|
| switching the fixed green light off/on |
