Page 7
SP-SW1900-HD Users Guide
RS-232 Communication Interface
RS-232 Communication Interface
The SW1900-HD uses an RS-232 serial interface to change attributes and behavior of the
SW1900-HD. The communication parameters are as follows: 115200 baud, 8 bit, no parity, and 1
stop bit. The baud rate is adjustable. Pins 2 (Rx), 3 (Tx), and 5 (GND) are used.
RS-232 Port Pinout
RS-232 Port Pinout
Computer
SP-SW1900-HD
Pin 2
Pin 2
Pin 3
Pin 3
Pin 5
Pin 5
RS-232 Communication Settings
RS-232 Communication Settings
Baud Rate
115,200 Adjustable
Packet Size
8 Bit
Parity
None
Stop Bit
1
See Page 10 for more detailed discussions on RS-232 commands and/or review the
SW1900-HD Programmers Guide
.
Power
Power
Using the AC to DC power supply shipped with the SW1900-HD, connect the round connector to
the SW1900-HD. The Power Indicator LED will illuminate above of the DC/5V location to indicate
that power is being received.
