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MAESTRO M9
RS-232 Serial Control
You must set the external RS-232 control system serial port of your control
system to match the data communication speed and format of the Maestro
M9. If these settings are incorrect, the Maestro M9 will not respond to the
commands.
Maestro M9 communication parameters:
Baud Rate:
38,400
Start Bit:
1
Data Bits:
8
Stop Bit:
1
Parity:
None
Flow Control:
None
Cable Wiring
The cable wiring to connect the Maestro M9 to your control system will
depend on the RS-232 output connection on the controller. Make certain
that you wire the Transmit Data output on the serial controller to the
Receive Data on the Maestro M9 and vice versa on the Receive Data line
on the controller system. Connect the signal grounds on the control system
and the Maestro M9 together. The RS-232 connection on the Maestro M9
is a DB-9 Male connector, labeled Control and is wired as follows:
Pin 2 Receive Data (RXD)
Pin 3 Transmit Date (TXD)
Pin 5 Ground
To connect the Maestro M9 to a standard PC serial com port; wire the
cable in a ‘null modem’ arrangement using the appropriate serial cable.
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