JLCooper MLA-1 - Manual (Page 4)

MLA-1 / MLA-10
Installation/Operations Manual
MLA-10
The front panel of the MLA-10 has the Power switch and LED and the MIDI
activity LEDs. These activity LEDs will flicker whenever the associated channel
carries MIDI data.
Power
INPUT OUTPUT
1 2 3 4 1 2 3 4
Activity LEDs
The rear panel of the MLA-10 has the power connector for the wall transformer,
the eight MIDI connectors, and the terminal strip for the multi-pair long run cable.
1 24
INPUT OUTPUT
1 3 4 2 1 3 4 2
Power
9VDC
Midi Connectors
Long run Multi-pair cable
The definition of the pins of the terminal strip are as follows:
Pin Name Pin Name Pin Name
1 MIDI In #1 (-) 9 MIDI Out #1 (-) 17 Ground
2 MIDI In #1 (+) 10 MIDI Out #1 (+) 18 Ground
3 MIDI In #2 (-) 11 MIDI Out #2 (-) 19 Ground
4 MIDI In #2 (+) 12 MIDI Out #2 (+) 20 Ground
5 MIDI In #3 (-) 13 MIDI Out #3 (-) 21 +9 VDC
6 MIDI In #3 (+) 14 MIDI Out #3 (+) 22 +9 VDC
7 MIDI In #4 (-) 15 MIDI Out #4 (-) 23 +9 VDC
8 MIDI In #4 (+) 16 MIDI Out #4 (+) 24 +9 VDC
This means that a MIDI signal put into the MLA-10's MIDI Input #1 will be
converted and transmitted out on pins 1 and 2 as a ± pair. Pins 17 thru 24 are
intended as output power to a MLA-1. Under no circumstances should pins 21
thru 24 be attached between two MLA-10 units.
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