Specifications

Maestro
tm
Phone [phone] • Fax [phone]
®
Integration with Automation
Section 5-2
controller system to send very long, complex strings of
commands and get an answer back to know that all those
commands were executed properly.
RS-232 Serial Control
You must set the external RS-232 control system serial port
to match the data speed and format that the Maestro is
expecting. If these settings are not correct, the Maestro will
not respond to the commands.
Set your communication parameters as follows:
Baud Rate:38,400
Data Bits: 8
Parity: None
Stops Bits:1
Flow Control: None
The cable wiring to connect the Maestro 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 and vice versa on the Receive Data line on the
controller system. Connect the signal grounds on the
control system and the Maestro together. The RS-232
connection on the Maestro is a DB-9 Male wired as follows:
Pin 2 Receive Data (RXD)
Pin 3 Transmit Date (TXD)
Pin 5 Ground
To connect the Maestro to a standard PC serial comm port;
wire the cable in a ‘null modem’ arrangement.