ashtech DG14, Reference Manual

Page: 29 / 390

General Information 9
General Information
Power Connections
All power and input/output connections are made at the J301 connector for the
Board, and through the serial connector for the Sensor.
Attach the serial cable to the DG16 Sensor, and then connect the power source to
the serial cable.
J301 is a 30-pin male dual inline (15 x 2) header connector. It provides a host of
useful connections in addition to power and I/O, including a connection for an
external LED, a connection for battery-backup for RAM maintenance, an input for
manual hardware reset, an output for a TTL-level timing pulse, a photogrammetry
time-tag input, and a measurement strobe output. Figure 1.3 lists the pin
assignments for the J301 connector.The power connect through the serial cable
CAUTION
To avoid damage to the DG16 Sensor, verify that the power source is off
while connecting or disconnecting cables to or from the unit.
CAUTION
To avoid damage to the DG16 board, ensure that pin 1 of the connecting
cable is attached to pin 1 on J301 as indicated in the drawing. Verify that
the power source is off while connecting or disconnecting cables to or
from the J301 connector.