Prometheus CPU User Manual V1.44
Page 67
1 Power
Switch
2 Power
Input
3 +12V
In
4 +5V
In
5 Ground
6 Power
Input
7 Shutdown
8 +5V
In
9 Ground
J13 pinout (user connection)
23.6 Speaker and Miscellaneous Connector
J3 is used for optional connection of an auxiliary speaker or control switches.
The panel board contains a miniature speaker which is enabled by default. To enable this
speaker, install a jumper across pins 11 and 13 of J3 (default setting). If a different speaker is
desired, or if no speaker is desired, remove the jumper.
To connect an auxiliary speaker, connect the speaker across pins 7-8 (for a speaker with a 2-pin
2-position housing) or across pins 7-13 (for a speaker with a 2-pin 4-position housing when the
two wires are on the two end positions of the housing).
External momentary switches may be connected to J3 to control power or reset. For power,
connect the switch between pins 1 and 2 of J3. For reset, connect the switch between pins 3 and
4. Each switch operates by connecting the selected control signal to ground.
To lock out the keyboard and mouse ports on the panel board, install a jumper across pins 5-6.
To disable the ATX power function, connect a jumper across pins 12 and 14 on J3.
An auxiliary sw5V pin is provided on J3 for customer application. In addition the
unswitched power may be used on this header to power a panel light or other customer circuit,
with the current limited to 1A.
Ground
1
2 Power
Switch
Ground
3
4 Reset
Switch
Ground
5
6 Keyboard/Mouse
Lockout
+5VDC Unswitched
7
8 Speaker
+5VDC Switched
9
10 N/C
Internal Speaker
11 12 Ground
Speaker
13 14 ATX
Disable
J3 Pinout
