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Mark Levinson RS-232 Control Manual

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No320S preamplifier
RS-232 control guide
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Summary of Contents for Mark Levinson RS-232

  • Page 1 No320S preamplifier RS-232 control guide...
  • Page 2 Overview Overview The Mark Levinson No320S preamplifier is equipped with an RS-232 control port. A complete set of command inputs and status outputs allow control of the No320S by an external control system (such as AMX or Crestron). This guide contains connection details and the RS-232 command list.

  • Page 3: Rs-232 Port Location

    Connection RS-232 Port RS-232 control is through an RJ-11 connector located on the back of the No320S next Location to the IR output. This connector has 6 pins of which only three are used for communication. RX TX GND RS-232 Port Pin Configuration.

  • Page 4: Rs-232 Control Cable

    As an example on making the cable we will use the most common connector used, Example which is a DSUB9. The No320S only needs 3 pins to control the unit via RS-232. As mentioned earlier the No320S’s pin 2 Data Receive must connect to the control devices Transmit.
  • Page 5 Dia gra m 2 – RJ-11 to DSUB9 Ca ble Pa rts Used for Ca ble Digikey Pa rt# Ra diosha ck Pa rt # (1) - 9 pin DSUB Female Connector A2047-ND 276-1537 (2) - 6 pin RJ-11 Connector A9027-ND 279-421 (3) - 9 pin DSUB Housing...

  • Page 6: Command List

    Command list Settings: 38.4K baud, 1 stop bit, no parity Format: !<command><cr> or !Vxx.x<cr> The '!' is used as a framing character and can be sent any time to reset the packet reception code. Note that all commands are 5 bytes ( '!' + 3char command + <cr>...
  • Page 7 Go to input 2 Go to input 3 Go to input 4 Go to input 5 Go to input 6 Go to input 7 “ ” Note: selects either input 7 or phono input if installed. Go to balance mode Exit balance mode Go to display intensity 0 Go to display intensity 25%...
  • Page 8 Status Update: Any change in the following 6 control keys will automatically send out the corresponding ASCII string. CONTROL KEY RETURNED VALUE COMMENT Select knob 1:IN:<1-7>:<input alias><cr> or input alias = first 7 ascii 1:IN:NONE<cr> if no current valid input characters from No320S selection input alias>...

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