USB Data Link Adapter 16
Using the USB-DLA
5.2. Plug in the vehicle interface cable
Connect the DLA to the vehicle using the vehicle interface cable provided. This cable
is typically a DB-15 (3) connected to a 9-pin Deutsch (4). Note that the vehicle
connector may change depending on the preference of the vehicle manufacturer.
Figure 10: Connect USB-DLA to vehicle
CAUTION
The USB ground is not isolated from the power ground. A computer connected to
the USB port must be electrically floating and not have any connections to the
outside world, including the AC power adapter and the serial port. Failure to
observe this may result in damage to the DLA and the computer USB port. If a
laptop battery needs to be charged, the USB port must be disconnected from the
DLA. If the DLA is to be used with a desktop computer, care must be taken to ensure
that the power supply to the DLA is isolated from any earth or vehicle ground.
5.3. USB-DLA LED Indicators
The USB-DLA has 3 LEDs for status indication. The LED indicators on the USB-DLA
fall into two categories: power status (1 LED) and network status (2 LEDs).
5.3.1. LED Colors and Blink codes
POWER ON (red) - The LED is off when no power applied. After the LED self-
test, the LED goes on steady.
J1708 (green) - The LED flashes on when the DLA detects traffic on the J1708
input terminals or when a J1708 message is sent from the DLA. During heavy
traffic, the LED may appear to be on steady. The LED stays off if no traffic is
detected and no messages are sent.
J1939/CAN (red) - The LED flashes on when the DLA detects traffic on the
J1939/CAN input terminals or when a J1939/CAN message is sent from the DLA.
During heavy traffic, the LED may appear to be on steady. The LED stays off if no
traffic detected and no messages are sent.
To Next Page
Loading...
General