AR-DM51-B Manual
www.marshall-usa.com
10
9.2 Connecting by Serial Link
To control the AR-DM51-B using an RS-232 serial link, first select the “RS232” radio button, then
select the port number. The correct port number will likely be the one with the highest numeric
value.
Note: A serial connection will require either a serial port on the PC or a serial adapter device most
likely attached to the computer by USB. The most common connector type will be a 9-pin DSub
similar to the one on the back of the AR-DM51-B. When that is the case, a successful connection
can be made using a “Null Modem Cable” or making a cable like this:
Computer AR-DM51-B
Pin 2 ---------------- Pin 3 (Tx to Rx)
Pin 3----------------- Pin 2 (Rx to Tx)
Pin 5 ---------------- Pin 5 (Ground)
