User's Manual

Hookup:
Power Input:
The DC310 radar features wide operating input voltage range of 5.5V-18V. In a typical
application it may be powered from a nominal 12V DC source and will feature best in
class operational power consumption of 14 mA (average). There is no other radar in the
world that even comes close to this ultra-low power usage. Competing products may
consume up to 20 times more power.
This ultra-low operational power translates directly into a longer battery life or gives you
an option to power the unit from smaller batteries and smaller solar panels.
Note: The radar employs aggressive power saving measures that include turning off parts
of the circuit that are not being used at any instant. To get a true measure of the power
usage of the circuit use a multi-meter that has an averaging function and does not suffer
from autoranging during measurements. Otherwise you will get current readings that
fluctuate from 7 mA to 23 mA.
Note: when the under-voltage lockout (UVL) feature is activated, the operating voltage
range is reduced to 6.2V-18V and dropping the input voltage to 4.5V-6.2V will put the
radar into a sleep mode where it will only update the internal clock.
Your power supply to the radar must be capable of supplying up to 40mA of current for
up to 5 seconds at a time (startup current is higher as the radar is initializing its internal
systems).
Serial Connection:
The DC310 features an RS232 interface that is used to output average speed, access
statistics data and configure the unit as explained later in this document.
The RS232 interface is factory set to default to “cable detect” mode and will power the
interface chip down to save power if the radar RX line is not connected. Cable detect
mode may be disabled and the interface may be forced ON via a bit in the “MD” variable.
Average Speed Output:
The DC310 can send out the average measured speed via the ASCII interface as a 3 digit
speed with an optional direction indicator. This option is not turned on in the default
configuration, and must be enabled. The format is:
[?,+,-]nnn[.ddd][\r,\n]
The format of the speed output can be adjusted to any combination of:
“?”: Optional prefix sent when 000 is selected to be sent when no vehicles are detected
“+”: Optional prefix sent when nnn speed is sent for incoming vehicles
“-”: Optional prefix sent when nnn speed is sent for outgoing vehicles
“nnn”: Three digit ASCII speed in the units selected via the UN variable