User guide

Page 8 AudioCore Version 8.40
AudioCore Version 8.40AudioCore Version 8.40
AudioCore Version 8.40
RS232 Interface
This interface is fitted as standard to all units and is accessed via the 9-pin D-type connector on the rear of the unit. Note
that to connect to a computer’s COM (serial) port correctly, a one-to-one cable must be used, and NOT a ‘null modem’
cable. A ‘null modem’ cable has the ‘transmit’ and ‘receive’ wires swapped over and will not work.
The RS232 connection is suitable for distances of about a maximum of 25 feet between the PC and the unit. If you
experience problems with the connections, consider
• selecting a slower baud rate
• selecting the ‘Use Acknowledge Cmd’ option in AudioCore (see the Remote Menu  RS232 Configuration
window)
• running the unit via the RS485 interface
Note than only one unit at a time may be connected to the computer via this interface. Additional units may be ‘daisy-
chained’ via the RS485 connections from the back of the first one (it acting as a converter for them), but their RS232 ports
are not used.
RS232 Connection (Single Unit)
A typical interface set-up might involve running an RS232 link from laptop or a desktop computer to a 4 Series unit set up
as a master unit. The diagram below shows this method of connection, the required menu options are also given.
Remember that the RS232 cable must be a 1-1 connection type, NOT a null modem cable (which has connections crossed
internally).