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Chapter: Connectors
3.20 SMB/I2C
The CB2051 can communicate with external devices via the SMBus protocol or the I2C protocol. The
signals for these protocols are available through a 2x5 pin connector (JST B10B-PHDSSLFSN, mating
connector: PHDR-10VS). The SMBus signals are processed by the chipset, the I2C signals are processed
by the SIO unit.
Pinout SMBus/I2C connector:
Description
3.3 volt supply
SMBus clock
SMBus alarm
I2C bus clock
5 volt supply
page 42
Name
Pin
3.3V
1
SMBCLK
2
SMBALRT# 3
I2CLK
4
VCC
5
Name
6
GND
7
SMBDAT
8
SVCC
9
I2DAT
10
GND
Beckhoff New Automation Technology CB2051
SMB/I2C
Description
ground
SMBus data
standby supply 5V
I2C bus data
ground
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