Alcorn Mcbride AM-4, Hardware And Software Reference Manual

Page: 21 / 77

Controlling the AM-4 15
Using a terminal block
to hold the diodes
makes the wiring neater.
For example, the following circuit allows switches to select files 1 to 15:
1 2
SYMBOLS:
SWITCH
1 2
1 2
1N4148
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
DB37 Contact Closure Diode Network Diagram for 15 Clips
Note:
The 37pin connector
on the diagram is
inverted from what you
see when looking at
the back of our
product.
This is so that
you can see what it will look
like when making a cable
assembly. Remember to
have the I/O setting to
Contact Closure.
You may use this as a guide
for building a diode network,
but it is only a reference.
We are not responsible for
any obvious errors in the
diagram. Use logic to verify
your setup is correct. If you
find errors with this diagram,
please notify Alcorn McBride.
You can help us help other
customers with the same
question.
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
2
21
1
20
4
23
3
22
6
25
5
24
8
27
7
26
10
29
9
28
12
31
11
30
14
33
13
32
16
35
15
34
18
37
17
36
19
Clip 3
1 2
Clip 1
1 2
Clip 2
1 2
Clip 4
1 2
Clip 5
1 2
Clip 6
1 2
Clip 7
1 2
Clip 8
Clip 9
1 2
Clip 10
1 2
Clip 11
1 2
Clip 12
1 2
Clip 15
1 2
Clip 14
1 2
Clip 13
1 2
1 2
Ground
I/O connector
1 2
If you don’t want to wire this circuit yourself, we have a cheap, discrete control
breakout-board that lets you directly select all 15 files and the control contacts like
Play, Stop, etc… without touching a diode or your soldering iron. Look for the
Input Expander at www.alcorn.com for details.