Product specifications

Crescent Integrator’s Manual 46
P OWERING THE C RESCENT V ECTOR E VALUATION
S YSTEM
The first step to powering the Crescent Vector Evaluation system is to terminate the
power leads of the power cable, connect the IDC connector or connect the USB.
There are a variety of power connectors and terminals on the market from which to
choose if you are terminating the power cable yourself, depending on your specific
requirements. We suggest that a weather-tight connection and connector be used if
the connection will be located outside or if it will be part of a portable system.
WARNING!
Do not apply a voltage higher than 18 VDC as this will damage the receiver and
void the warranty.
To turn on the Crescent Vector Evaluation system:
• Connect the red wire of the cable’s power input to DC positive (+).
• Connect the black wire of the cable’s power input to DC negative (-).
The Crescent Vector Evaluation Motherboard features reverse polarity protection to
prevent damage if the power leads are accidentally reversed.
A 1.0 A fast-blow fuse, situated in-line of the power input of the extension cable and
protects the Crescent Vector receiver from power surges. The fuse container should
remain accessible after installation.
The Crescent Vector Evaluation system will start when an acceptable voltage is
applied to the power leads of the extension cable. Be careful not to provide a
voltage higher than the input range as this could damage the system.
WARNING!
Do not operate the Crescent Vector Evaluation system with the fuse bypassed.
Such a modification will void the product warranty.
S ERIAL P ORT I NTERFACE
The four serial ports of the Crescent Vector Evaluation motherboard are compatible
with the RS-232C interface level to communicate with external data loggers,
navigation systems, PC computers, PDAs and other devices. These serial ports are
accessible via the rear panel of the Evaluation Enclosure and have Port A, Port B,
Port C and Port D labels.
You may use any of the ports A, B or C for operation of the system, however Port A
should be used for firmware updates. Port D has been designed exclusively as an
external correction input port, however, either Port A, B or C may be used for the
input of external differential corrections, if needed.
The following three tables provide the pin assignments for all three ports.