Beckhoff CB4052 Manual de usuario descargar pdf (Pagina 15)

Power Supply Chapter: Connectors

Beckhoff New Automation Technology CB4052 page 15

3.2 Power Supply

The power supply of the hardware module is realized via a 2x5-pin connector (Molex PS 43045-10xx,

mating connector: Molex PS 43025-10xx). Both 5V VCC/SVCC and 12V need to be provided. The 12V

input can optionally be tied to 5V if 12V is not required by attached peripherals. It cannot, however, be left

unconnected.

CAUTION

The CB4052 includes circuitry that will notify an intelligent power supply to shut down if the processor

reaches a critical temperature. This is achieved by deasserting the (low-active) PS_ON# signal found on

the SM-Bus connector. When PS_ON# is no longer pulled low, an intelligent power supply would take this

as a signal to shut down power. For this to work, PS_ON# must be connected to the power supply's

PS_ON input. If PS_ON# is not otherwise connected, the CB4052 can be damaged beyond repair if a

thermal shutdown event occurs. In rare instances, if power is not shut down, the board will continue to

heat up until failure occurs.

NOTE

Since this is a 90 degree connector, the symbol in the drawing below represents the connector face as

seen from the side (PCB on bottom) rather than from above.

Description Name Pin Name Description

12 volt supply 12V 1 6 12V 12 volt supply

ground GND 2 7 GND ground

ground GND 3 8 SVCC standby-supply 5V

ground GND 4 9 GND ground

5 volt supply VCC 5 10 VCC 5 volt supply

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 72 73

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Beckhoff CB4052 Manual de usuario Pagina 15