85
Chapter 5
RS-232 Commands
Serial Control Protocol Commands
The VM3404H / VM3909H’s built-in bi-directional RS-232 serial interface
allows system control through a high-end controller or PC. The RS-232
commands for the VM3404H and VM3909H are the same, with the only
difference being that the VM3909H has 5 additional ports.
RS232 Pin Assignment
Configuring the Serial Port
The controller’s serial port should be configured as follows:
Pin
Description
Pin
Description
1
Not connected
6
Not connected
2
RXD
7
Not connected
3
TXD
8
Not connected
4
Not connected
9
Not connected
5
GND
Baud Rate
19200
Data Bits
8
Parity
None
Stop Bits
1
Flow Control
None
Содержание VM3404H
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