BECKHOFF CB4053 - Manual (Page 37)

SMBus Chapter: Connectors
Beckhoff New Automation Technology CB4053 page 37
4.16 SMBus
The CB4053 can communicate with external devices via the SMBus protocol. The signals for this protocol
are available through a standard IDC socket connector with a spacing of 2.54 mm. A 3.3 volt power
supply is also available for these SMBus devices. Additionally, you can use this connector to access the
PWRBTN# and PS_ON# signals used for power control. If PWRBTN# is held low for four seconds an
unconditional hardware power-down event will occur.
Pin Name Description
1 3.3V 3.3 volt supply
2 CS-SMB-CLK SMBus clock
3 CS-SMB-DAT SMBus data
4 SMB-ALERT# SMBus alert
5 PWRBTN# power button
6 PS_ON# power supply on
7 GND ground