Power Supply - Beckhoff CB2051 Manual

Chapter: Connectors

3.1 Power Supply

The power supply of the hardware module is realized via a 2x8-pin connector (Molex PS 43045-16xx,
mating connector: Molex PS 43025-16xx). The pins for 12 volt have the sole purpose of supplying one or
both fans with the necessary current. Thus, when no fan is installed, these pins have no function. COM3
RXD and TXD can also be used for connecting a second power supply unit, e. g. for UPS. As an ordering
option SMBus signals SCL/SDA can be provided (replacing COM3 TXD/RXD).
Description
COM3 transmit data
PSU on
powerbutton PSU
12 volt supply
ground
ground
5 volt supply
5 volt supply
page 16
Name Pin
TXD 1
PS-ON 2
PWRBTN# 3
12V 4
GND 5
GND 6
VCC 7
VCC 8
Name
9 RXD
10 PWRGD
11 SVCC
12 12V
13 GND
14 GND
15 VCC
16 VCC
Beckhoff New Automation Technology CB2051
Power Supply
Description
COM3 receive data
Powergood
standby-supply 5V
12 volt supply
ground
ground
5 volt supply
5 volt supply