Yokogawa Safety Node Unit SNB10D 

the safety node unit SNB10D is connected to the safety control unit. SNB10D has an interface function to transmit analog input signals and contact signals from the field to the safety control unit via an ESB bus. It also has a function to supply power to I/O modules.
The safety node unit SNB10D is mounted with power supply modules, ESB bus interface modules, optical ESB bus repeater modules, and I/O modules.

SNB10D, SDCV01, S9049PM