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Connections
Rear panel layout
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1) E xternal volume control on 2 pole euroblock : here you can connect a standard 10 kΩ linear
potentiometer, wired as an adjustable resistor, using a shielded cable. Connect the shield to
the – connector. When enabled in the settings menu, this external potentiometer allows you to
increase or decrease the master volume in 2 dB steps. Enabling the external volume control
automatically disables the front panel master volume control. Serial port volume control will
also be disabled. When no external potentiometer is connected while the external volume
control feature is enabled, or the connecting cable is faulty, or the value of the potentiometer is
out of range, the 3 SGL/ERROR LED's on the front panel will light up red and blink. The display
will show "INVALID EXT. VOL" and the audio signal will remain muted until the connection has
been repaired or the external volume control has been disabled in the settings menu.
2) R S232 port on DB9 connector. Standard serial port connector for programming, external
control and firmware updates using our firmware update program available online. Port settings
are fixed at 19200 baudrate, 8 databits, no parity, no handshake. LF (line feed), BS (backspace)
and ECHO are not enabled but can be enabled using an RS232 command string. More
information in the RS232 commands chapter.
W hen the text returned via RS232 is garbled or no communication is possible, adjust your
communication parameters to match those of the unit. If you are not familiar with RS232
communication, serial cables and communication parameters, ask for assistance from a
qualified engineer!
!!!WARNING!!!
Connecting a computer or any other similar control device via RS232, may cause a severe ground
loop! Ground loops may cause erratic behavior and eventually damage your system components.
3) A PNET connector. For future use. DO NOT connect any kind of computer network cable here.
It will result in malfunction or damage to your network!
4) Right channel XLR male input connector.
5) Right channel XLR female input signal connector.
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