BECKHOFF CB2051 - Manual (Page 39)

SMB/I2C Chapter: Connectors
Beckhoff New Automation Technology CB2051 page 39
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 ICH chip (Intel 82801), the I2C
signals are processed by the SIO1 unit (Winbond W83627).
Pinout SMBus/I2C connector:
Description Name Pin Name Description
3.3 volt supply 3.3V 1 6 GND ground
SMBus clock SMBCLK 2 7 SMBDAT SMBus data
SMBus alarm SMBALRT# 3 8 SVCC standby supply 5V
I2C bus clock I2CLK 4 9 I2DAT I2C bus data
5 volt supply VCC 5 10 GND ground