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3.
ATEUS
®
- BLUESTAR Description – Plug-In Boards
3.1. CPU Board
3.1.1. Board Description
The CPU board contains a powerful processor system controlling the whole system. The
board is designed on a 4-layer PCB of the size of 160x100mm. A simple serial interface COM1,
an Ethernet connector (10Base-T), and 7 board status LED indicators are located on the front
panel.
PWR LED
indicates board supply
INIT LED
indicates board initialization or error status
MEM LED
indicates call memory full (not shining=empty memory,
blinking 1:1 memory is 50% full, shining = 100% full
memory
RX LED
indicates reception via COM1
TX LED
indicates transmission via COM1
LINK LED
indicates connection to Ethernet
ACT LED
indicates activity via Ethernet
3.1.2. COM1 Serial Interface Parameters
The COM1 interface is used as a local port for temporary connection of a PC (terminal) for
installation and servicing purposes (and BOOTware loading into the processor) and permanent
connection of the SMS server (supervision PC). It allows to provide local monitoring,
configuration, tracing and firmware upgrade.
Transmission rate
57.6 kBd
Bit format
start, 8bit, stop (no parity)
Signals
RXD,TXD,RTS,CTS,GND
3.1.3. Lithium Battery Replacement
WARNING! Incorrect battery replacement may cause explosion. The
battery can be replaced with a battery of the same or equivalent type
only as recommended by the manufacturer. Handle used batteries as
instructed by the manufacturer.
The lithium battery on the CPU board backs up the internal real time clock in case of
supply power outage. Its average life is about three years, then it is advisable to replace it
preventively. Replacing the lithium battery, be sure to turn the subrack power supply off using
the mains switch and, having loosened two fitting screws, push the CPU board out. Remove the
old battery from the holder using a suitable tool and insert a new one. Restore the original
status taking the said steps in the opposite order.
Battery type: CR2430.
WARNING! Never use metal tools for battery replacement; neither the
new nor the old battery may be short-circuited! A short-circuit may
result in battery damage or explosion!!!
Dispose of used batteries in accordance with applicable regulations, put them in a recycling
yard, for example.
