page 20 of 44 M.1k2 Hardware Guide - Version 1.3
CHAPTER 4: Operation
User data (Serial, MIDI, GPO)
For remote application and signaling purposes there are connection possibilities for
RS 232 / 422 / 485, MIDI and General Purpose Output (GPO).
Serial signals can be routed either by using user bits* of a MADI frame. 4 GPOs
can be triggered manually or automatically by a system event.
SERIAL 232 DSUB-9 socket (male)
Connect RS-232 signal here.
Observe the correct pin assignment**. For safe
operation lock the connection using the jack bolts.
SERIAL 4xx DSUB-9 socket (female)
Connect RS-422 or RS-485 signal here.
Observe the correct pin assignment**. For safe
operation lock the connection using the jack bolts.
GPO DSUB-9 socket (female)
Connect GPO signals here.
Observe the correct pin assignment**. For safe
operation lock the connection using the jack bolts.
MIDI OUT DIN socket
Connect MIDI output signal here.
MIDI IN DIN socket
Connect MIDI input signal here.
* Tunneling of MIDI signals is compatible to the transmission method used by all
other DirectOut devices and RME products. Tunneling of RS-232 and RS-4xx data
is compatible to the transmission method used by Studer / Soundcraft.
** The pin assignment is described in „Appendix B - DSUB-9 Pin assignments“ on
page 27
The USB port may be used as serial port too -
see „Remote Operation“ on page 22.
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