Backplane architecture
31
Model 6276 User Guide
3 • System architecture
There are also two 3U x 160mm slots on the front right side, called the “Power Bay”, to mount Patton Power
Supply Modules configured for external DC or AC power input.
A rear view of the 2U Model 6276 is shown in
figure 12
.
Figure 12. Rear view of chassis
showing the midplane/backplane
There are two user-configurable straps and a DIP switch located in the rear 3U area of the chassis.
•
VIO signaling
—This strap (using J1, J2, J3) sets the V I/O signaling voltage to 3.3 or 5 VDC. For all
ForeFront applications, this should be set to 3.3v. Do not change it from this setting.
•
Frame ground/signal ground
—This strap (using J4, J5) allows the user to electrically connect frame
ground (FG) to signal ground (SG). By default, these signals are electrically isolated. Patton Electronics rec-