Operations Manual

INSTALLATION 3-9
O&M of the MCC-545B PACKET DATA RADIO
12/2000
IMPORTANT
The AUX port connector has three extra pins (pins 6, 8, and 9) whose signals do not conform to
the RS-232 standard. These are for MCC test purposes and are not used at this time. These pins
will NOT interfere with a normal 3-wire RS-232 connector (pins 2, 3, and 5).
3.3 Power-Up Sequence
IMPORTANT
Before you apply power to the 545B, check all connections between the 545B and external
equipment (power, antenna, operator terminal, GPS receiver, data logger(s), etc.). Refer to
Section 3.2 for complete cabling instructions.
3.3.1 Internal Battery
When the 545B is shipped from the factory, it does NOT have the internal LiIon battery
connected to the processor RAM. This battery is used to provide battery back-up of time and
date in the event of a power failure. Check to make certain battery is correctly installed.
3.3.2 Power On
CAUTION
Disconnect antenna cable until unit ID is set (see paragraph 3.3.3).
To power up the 545B, apply +12VDC to the power connector. When the unit transmits, it will
draw up to 25 amps, so make sure that you use a large at least two # 16 gage wires for the power
and two for the ground. Limit cable lengths to less than 10 feet. If larger runs are required use
larger diameter wires. The voltage drop in the power wires plus the drop in the battery voltage
should be less than 2 VDC for proper operation of the unit.
The 545B processor should come start up and print a greeting message on the operator terminal,
assuming it was turned on and set to the baud rate that matches the processor on the 545B. The
545B's default baud rate setting is 9600 baud, with no parity, 8-bit data bit, and 1 stop bit.
However, the current baud rate is determined by the last configuration settings saved in the
545B's flash memory. If necessary, refer to Chapter 4 for changing the 545B baud rate settings
with the SETBAUD and SAVE commands.