Kontron AT8402 User Manual - Manual (Page 53)

AT8402 Hardware Description
Page 3 - 20 AT8402 User Guide
3.1.9.6 Power Transients
The board provides continuous operation in the presence of transients shown in the following
table of the PICMG 3.0 standard:
Table 3-17: Power Transients
In case of a 0V transient the board is able to keep the board alive for 5ms. The necessary en-
ergy is buffered in a capacitor.
3.1.9.7 Optional Chassis to Logic Ground Connection
According to NEBS requirement R9-14 of GR-1089-CORE issue 3, the AT8402 provides a con-
nection between chassis and logic ground. It is made up of a screw that connects the PCB to
the bottom sheet.
If chassis and logic ground shall be isolated, the screw with its washer can be removed. It is
located near the jumper header J33 and is labelled "GND TO CHASSIS".
3.1.10 Jumpers
Six jumpers in the upper right corner allow debug settings (J33). The IPMI and PCIe E-Keying
override jumpers enable bypassing communication with the ShMC for bench operation. The
JTAG jumpers configure the boundary scan path. JTAG operation requires the use of the
RTM8400.
Voltage Duration Comments Protected by
- 200 Volts 5 µs - 100 to - 200 Volts Frame or Shelf
- 100 Volts 10 µs - 75 to - 100 Volts Board
- 75 Volts 10 ms 10 Volts per ms-Rise or Fall Board
- 0 Volts 5 ms
50 Volts per ms-Fall
12.5 Volts per ms-Rise
Assumes prior voltage is above -44 VDC
for Shelves, -43 VDC for Boards
Board
Warning!
Operation with any of these jumpers set is not supported by the standard appli-
cation software.