Power Transients - Kontron AT8402 User Manual

AT8402
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
Voltage Duration
- 200 Volts 5 µs
- 100 Volts 10 µs
- 75 Volts 10 ms
- 0 Volts 5 ms
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.
Warning!
Operation with any of these jumpers set is not supported by the standard appli-
cation software.
Comments
- 100 to - 200 Volts
- 75 to - 100 Volts
10 Volts per ms-Rise or Fall
50 Volts per ms-Fall
12.5 Volts per ms-Rise
Assumes prior voltage is above -44 VDC
for Shelves, -43 VDC for Boards
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AT8402 User Guide