System Features - VersaLogic VL-EBX-37 Reference Manual

Power Supply
P C
OWER ONNECTOR
Main power is applied to the VL-EBX-37 through an EPIC-style 10-pin polarized connector at
location J6.
Warning! To prevent severe and possibly irreparable damage to the system, it is critical that
the power connectors are wired correctly. Make sure to use all +5V
ground pins to prevent excess voltage drop.
Note
The +3.3V
required for PC/104-Plus and PC/104 expansion modules that require these
voltages.
P R
OWER EQUIREMENTS
The VL-EBX-37 requires +5.0 volts (±5%) for proper operation. The higher voltages required
for the RS-232 ports and analog input sections are generated as needed on-board. Low-voltage
supply circuits provide the many power rails required by the CPU and other on-board devices.
The exact power requirement of the VL-EBX-37 depends on several factors, including memory
configuration, CPU speed, peripheral connections, type and number of expansion modules and
attached devices. For example, PS/2 keyboards typically draw their power directly from the VL-
EBX-37, and USB devices can draw considerable power depending on the device.
EBX-37 Reference Manual

System Features

(J6)
Table 4: Main Power Connector Pinout
J6 Signal
Pin Name
1 GND
2 GND
3 GND
4 +12V
DC
5 +3.3V
DC
6 NC
7 +5V
DC
8 +5V
DC
9 -12V
DC
10 GND
, +12V and -12V
DC DC
Description
Ground
Ground
Ground
Power Input
Power Input
Not Connected
Power Input
Power Input
Power Input
Ground
inputs on the main power connector are only
DC
4
pins and all
DC
20