Matrix Orbital LK202-25 Legacy - Manual (Page 13)

WARNINGS
• Do not apply any voltage other than the specified voltage.
• Do not apply voltage to the DB-9 connector AND power connec-
tor.
• Do not apply more than +5VDC to pin #9 on the DB-9 connector
if module is designated “standard voltage”. If the module is des-
ignated “wide or extended voltage”, then you may apply between
8-15 Volts accordingly. Please see the figures below for power
connections and appropriate solder jump required.
Figure 8: RS-232 and Power Connections
Figure 9: Power Applied via DB9 Connector
The RS-232 connector on the PC cable is wired so that a standard ‘straight through’ 9 pin D-sub cable
may be used to connect the module to a standard serial port such as COM ports on PCs.
NOTE This device complies with the EIA232 standard in that it uses signal levels from
+/- 3V to +/- 12V. It will not operate correctly at TTL (0 to +5V) levels with out modifica-
tion. A null modem cable will not work. Please see figure below for pin out configuration.
Matrix Orbital LK202-25 9