User's Manual

6 Spread Spectrum Radio System User’s Manual
March 2001
Over and Undervoltage Protection
The Hub power board has built-in protection from damage to the
electronics during a constant steady-state over or undervoltage
condition. When either condition occurs, the Hub shuts off by
disconnecting itself from the power source, and remains off as long as
the accessory switch is open. When the condition no longer exists, and
the accessory switch closes, the Hub turns itself back on.
When the accessory switch opens during normal operation, a soft
shutdown occurs, which permits the software to save data, complete
pending radio communications, and shut down in an orderly fashion.
Connectors and Indicators
There are 11 external connectors on the front of the Hub. A decal
affixed to the top of the Hub indicates the type of connection at each.
One of these connectors is reserved for future use. The other 10 are
briefly described in the following table:
Table 2 Equipment Hub Connectors
Connector Description
GPS ANTENNA type TNC coaxial cable connector for GPS
antenna
SLIP RS-232 service port for laptop during system
startup, update, and troubleshooting
CAN A
(2 connectors)
provides power output to and data
communications with standard CAN devices
including CGC and external GSP units;
software configurable to support SAE
standard devices
RADIO A
provides power and data link to radio A
*
* The radios are configured A or B during software installation.
RADIO B
provides power and data link to radio B
*
POWER receives source power
DIGITAL I/O provides two digital inputs for contact-
closure-type devices such as foot switches
GSP provides 15-V isolated power to and two
communications ports (A and B) for serial
devices. The A port can be RS-232 or RS-485;
the B port is RS-232.
ETHERNET standard 10Base-T network connection