Doepfer MBP25 Midi Bass Pedal Electronics Kit - Manual (Page 6)

MBP25 Page 6 User's Guide
Connections
Please refer to the picture on the next page.
(1) Power Supply
The MBP25 does not have a built-in power supply. Instead it uses a plug-in type
external power supply (AC adapter). One reason for this feature is electrical safety.
Keeping danger voltages (main) out of the MBP25 increases the electrical safety.
Therefore an external power supply of high quality and safety should be used. If the
device is used in Germany the external power supply has to be VDE approved.
Another reason for the external power supply is the fact that line voltages and plug
types vary considerably from country to country. Using a plug-in external supply the
MBP25 can be used anywhere with a locally purchased power supply, thus keeping
the retail price down.
The power supply must be able to deliver 7-12 V stabilized or unstabilized DC
voltage, as well as a minimum current of 250mA. The MBP25 is switched ON by
plugging the AC adapter into a wall outlet and connecting it to the appropriate jack on
the MBP25 board. There is no separate ON/OFF switch. If the polarity of the power
supply is incorrect, the MBP25 will not function. However, there is no danger of
damage to the circuitry since it is protected by a diode. The correct polarity is: outside
ring = GND, inside lead = +7...12V. The power supply not included with the MBP25
and has to be purchased separately.
After power on the six LEDs light up for a short moment and the software version
(e.g. 100 for version 1.00) is displayed. After a while the operating mode is displayed
(note or program change or real time, see below mode).
(2) Midi Out
Connect the midi out jack with midi In of the device to be controlled by the MBP25
(e.g. sound expander, computer, sequencer, synthesizer) via a suitable midi cable.
(3) Midi In
The MBP25 features a midi input. This input may be connected to another midi
device. The incoming midi data are merged to the data generated by the MBP25. At
the first place the midi input is used for the combination of the MBP25 with a midi
keyboard (e.g. MKE, CTM64 or another midi keyboard). The midi input of MBP25 is
not suitable for large amounts of Midi (e.g. SysEx strings or Midi messages coming
from an computer sequencer). In case of large amounts of incoming Midi messages
data loss or delay may occur. But for midi keyboards the data rate of the MBP25 midi
input is sufficient. If the merge feature of the MBP25 is not required the Midi input is
left open.