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Yokogawa SB301 SB Bus Interface Card

Yokogawa SB301 SB Bus Interface Card

Item NO.: 3797338
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Warranty: 1 year 


Condition : brand new in factory sealed box


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Detail

  • Product NameYokogawa SB301 SB Bus Interface Card
  • Item NO.3797338
  • Weight0.3000 kg = 0.6614 lb = 10.5822 oz
  • CategoryDCS
  • BrandYOKOGAWA
  • Creation Time2026-10-16
CENTUM CS 3000 / SB BUS / MASTER INTERFACE

Yokogawa SB301 SB Bus Interface Card

A field-proven CENTUM CS 3000 bus interface card used to provide the active SB-bus master function in an FCU.

ManufacturerYokogawa
Exact modelSB301
Product typeCENTUM CS 3000 SB Bus Interface Card
01

Overview

SB301 is the SB bus interface card used in Yokogawa CENTUM CS 3000 field control units. The active card operates as the bus master and communicates with connected node units.

Two SB301 cards can be installed for a dual-redundant arrangement. Control software assigns active and standby status, normally aligning the active interface with the active CPU side.

The redundant buses are used alternately; when one bus is detected as abnormal, communication transfers to the other and the abnormal path is periodically tested for recovery.

02

Specifications

ManufacturerYokogawa
Exact modelSB301
System familyCENTUM CS 3000
Product typeSB bus interface card
Primary roleActive SB-bus master communication with node units
RedundancyTwo cards can form a dual-redundant interface
Operating statesActive and standby under FCU software control
Bus recovery behaviorAbnormal path is periodically tested for return to normal
Selection basisExact card label, FCU model, slot and system documentation
03

Features

01

Active and standby assignment supports continuous bus-interface availability.

02

Dual bus paths permit operation to continue when one path is abnormal.

03

Periodic testing of the abnormal path supports controlled recovery monitoring.

04

The model is documented as field-proven CENTUM CS 3000 hardware.

04

Applications

  • Maintenance of documented CENTUM CS 3000 field control units.
  • Redundant SB-bus master interface arrangements.
  • Like-for-like replacement where the FCU, slot and system release support the exact card.
05

Lifecycle

  • Export or record the control-system configuration and identify the active and standby sides before service.
  • Verify the FCU model, slot, card revision and partner interface card from the installed labels.
  • Follow the Yokogawa maintenance procedure for bus switchover and card exchange.
  • After installation, confirm active/standby status, both communication paths, diagnostics and node communication.
06

FAQ

Q01Can one SB301 card provide the SB-bus master function?

The active SB301 provides the master function; two cards are used when the FCU is configured for a dual-redundant interface.

Q02How is the active SB301 selected in a redundant pair?

FCU software controls active and standby status, normally assigning the card on the active CPU side as active.

Q03Can SB301 be substituted with SB401?

Do not assume interchangeability. They belong to different documented interface roles and system generations; verify the exact FCU manual and card slot.

Q04What should accompany an SB301 enquiry?

Provide the FCU model, system release, card revision, slot, partner-card label, fault diagnostics and photographs of both bus connections.

Q05What proves SB301 has been returned to service correctly?

Confirm both bus paths, active/standby indication, node communication, diagnostic clearance and the approved redundancy test.

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