Beckhoff CB1051, Manual

Page: 40 / 82

Chapter: Connectors Internal Connectors
page 40 Beckhoff New Automation Technology CB1051
3.4.8 PCI-express interfaces (x1)
The CB1051 board has three slots for PCIe-x1 expansion cards.
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Please note that some signals in the following table are different from one PCIe slot to the other. This
applies to the clock signals (A13, A14), the receive signals (A16, A17), and the transmit signals (B14,
B15).
Pinout PCI-express-x1 connector:
Description Name Pin Name Description
hot plug detect 1 PRSNT1# A1 B1 12V 12 volt supply
12 volt supply 12V A2 B2 12V 12 volt supply
12 volt supply 12V A3 B3 N/C reserved
ground GND A4 B4 GND ground
reserved N/C A5 B5 SMBCLK SMBus clock PCIe
reserved N/C A6 B6 SMBDAT SMBus data PCIe
reserved N/C A7 B7 GND ground
reserved N/C A8 B8 3.3V 3.3 volt supply
3.3 volt supply 3.3V A9 B9 N/C reserved
3.3 volt supply 3.3V A10 B10 S3.3V 3.3V standby-supply
PCIe reset PERST# A11 B11 PEWAKE# link reactivation
ground GND A12 B12 N/C reserved
reference clock + REFCLK A13 B13 GND ground
reference clock - REFCLK# A14 B14 PET0 transmit lane 0 +
ground GND A15 B15 PET0# transmit lane 0 -
receive lane 0 + PER0 A16 B16 GND ground
receive lane 0 - PER0# A17 B17 PRSNT2# hot plug detect 2
ground GND A18 B18 GND ground