YOKOGAWA EB501

The FIO (Fieldnetwork I/O) System is connected to the Field Control Unit (FCU) via an ESB, optical ESB, or ER 

bus.

The Field Control Unit (AFV30/AFV40) is connected to an ESB Bus Node Unit (ANB10) or an Optical ESB 

Bus Node Unit (ANB11). The Field Control Unit (AFV10) is connected to an ESB Bus Node Unit (ANB10) or 

an ER Bus Node Unit (ANR10).

A node unit consists of a power supply module, a bus interface module, and input/output modules that are installed 

in a base unit. The power supply module, bus interface module, and input/output modules can be configured 

redundantly.

The Unit for Optical ESB Bus Repeater Module (ANT10U) can be used to connect the optical ESB bus in a chain or 

star configuration. 

The following shows a system configuration example.

l ESB bus/Optical ESB bus

When using Field Control Unit (AFV30/AFV40)

Application

An ESB bus or an optical ESB bus is an input/output communication bus that connects the ESB bus node unit or 

optical ESB bus node unit to the intelligent part of the FCS. 

Communication Speciffcations

Connectable Units: ESB Bus Node Unit (ANB10), Optical ESB Bus Node Unit (ANB11), and Unit for Optical ESB 

Bus Repeater Module (ANT10U)

Number of Connectable Units: The number of ESB bus node units and optical ESB bus node units that can be 

connected to the ESB bus varies depending on the selected database. 

Units for Optical ESB Bus Repeater Module (ANT10U) are not included in the number of connectable units.

*1: ESB Bus Node Unit (ANB10), Optical ESB Bus Node Unit (ANB11)

*2: To connect the ESB bus node unit and optical ESB bus node unit to the FCU (AFV30/AFV40), install the ESB Bus 

Coupler Module (EC401 or EC402) in slots 7 and 8. 

EC401 can be connected a maximum of nine Node Units (ANB10or ANB11).

EC402 can be connected a maximum of nine Node Units (ANB10or ANB11) on the upper and lower sides, respectively.

The sum of the total number of Node Units (ANB10 or ANB11) per FCU should not exceed the speciffed number.

*3: The maximum number of ESB bus node units, optical ESB bus node units, and units for optical ESB bus repeater module 

that can be installed in a single cabinet is 11 for AFV40. 

Transmission Path Speciffcations

Network Topology: Bus topology

Transmission Path Redundancy: Available

Transmission Speed: 128 megabits per second

Transmission Cable: Dedicated cable (YCB301), an optical ffber cable (*1)

Transmission Distance: Max. 10 m (*2), 50 km (when using the ANT411 Optical ESB Bus Repeater Module) (*3)

*1: Optical Fiber Cable Speciffcations

Connector Type: LC (compliant with IEC 61754-20)

Recommended Cable: Quartz single-mode ffber (JIS C6835 SSMA -9.3/125 IEC 60793-2-50B1.1)

Number of Cores: 2

*2: Max. 10 m for EC401 and max. 10 m on the upper and lower sides, respectively, for EC402. 

*3: The distance can be extended to a maximum of 50 km using the optical ESB bus repeater module. Chain and star 

connection conffgurations are available. 

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