INSTALLATIONS
ROBO-3600VLA User’s Manual 21
J18: Digital I/O Connector (4 in, 4 out)
This 12-pin Digital I/O connector supports TTL levels and is used to
control external devices requiring ON/OFF circuitry.
Signal Name
Pin #
Pin #
Signal Name
In0
1
7
+5V
In1
2
8
Out0
In2
3
9
Ground
In3
4
10
Out1
Ground
5
11
+12V
Out2
6
12
Out3
J20: CPU Fan Power Connector
J20 is a 3-pin header for the CPU fan power.
Pin #
Signal Name
1
Ground
2
+12V
3
Rotation detection
J21: USB Connector
J21 supports an external USB connector with two ports.
Pin #
Signal Name
1
5
Vcc
2
6
USB-
3
7
USB+
4
8
Ground
J22: Audio Connector
J22, a 12-pin header connector, supports an optional external connector
supporting 3 sockets for Line Out, Line In and Mic functions. The
following table shows the pin assignments of this connector.
Signal Name
Pin #
Pin #
Signal Name
Line Out R
1
2
Line Out L
Ground
3
4
Ground
Line In R
5
6
Line In L
Ground
7
8
Ground
Mic
9
10
BIAS
Ground
11
12
NC
