Transient Voltage Suppression (Tvs) Devices - VersaLogic Python EBX-11 Reference Manual

T V
RANSIENT OLTAGE
The EBX-11 circuitry is protected from spike and surge damage by on-board transient voltage
suppression (TVS) devices on the user I/O signals. Figure 1 shows a typical example of TVS
circuitry. In order for the TVS devices to function properly, they must be connected to earth
ground. This connection is made at the board's lower right mounting hole, as shown in Figure 2.
All other mounting holes are floating. Use metal standoffs or a grounding strap to connect the
lower right mounting hole to the enclosure chassis, which should be connected to earth ground.
EBX-11
"Python"
EBX-11 Reference Manual
S (TVS) D
UPPRESSION EVICES
Figure 1. Schematic Showing Typical TVS Circuitry
CPU
Figure 2. Attaching the EBX-11 to Earth Ground
Introduction
Keyboard Data
Keyboard Clock
Mouse Data
Mouse Clock
TVS Devices
Earth Ground
Only the lower right
mounting hole connects
to the TVS devices. This
hole must be connected
to earth for TVS
protection to function.
5