RB301-S2 is a Yokogawa RIO Bus Interface Master Card used as the master-side interface for a Remote I/O communication architecture. It is associated with the RB301 family and is identified with the S2 style. The assembly designation commonly associated with RB301-S2 is S9751AU-02.
RIO BUSMASTER INTERFACECENTUM SYSTEMS
RIO
BUS INTERFACE
STYLE S2
PRODUCT IDENTITY
MODEL
RB301-S2
Yokogawa RIO interface card
CARD TYPE
RIO BUS INTERFACE
Master-side communication interface
STYLE
S2
RB301 style designation
ASSOCIATED ASSEMBLY
S9751AU-02
Assembly designation associated with RB301-S2
RIO COMMUNICATION ARCHITECTURE
RB301-S2 occupies the master-side position in a Yokogawa Remote I/O communication structure, providing the interface between the control-system side and the RIO network.
CONTROL SIDE
CENTUM
Control-system environment
→
interface
MASTER INTERFACE
RB301-S2
RIO Bus Interface Master Card
→
RIO bus
REMOTE SIDE
REMOTE I/O
Distributed field I/O architecture
COMMUNICATION FUNCTION
The RB301 family is used for RIO bus interfacing. In an installed system, the card's role is not equivalent to a conventional process I/O channel: it serves as the communication interface that links the control-side architecture with remote I/O.
TECHNICAL PROFILE
MODEL STRUCTURE
Manufacturer
Yokogawa
Model
RB301-S2
Function
RIO Bus Interface Master
Family
RB301
Style
S2
Associated assembly
S9751AU-02
APPLICATION ROLE
RB301-S2 is intended for installations where the control system communicates with remote I/O through the RIO bus architecture. It should therefore be evaluated as a communication-interface component rather than as an individual analog or digital field I/O point.
IDENTIFICATION CHECK
Main model
RB301-S2
Family identifier
RB301
Style identifier
S2
Assembly identifier
S9751AU-02
For replacement purchasing, match both the complete RB301-S2 model designation and the associated assembly identification rather than relying on the RB301 family name alone.
RB301-S2 FAMILY & SYSTEM RELATION
The most useful comparison is by communication role, system generation and interface architecture rather than by appearance alone.
RB301-S1
RB301 family / Style S1
The S1 designation represents another RB301 style. It should not automatically be substituted for an S2 installation simply because the base family name is the same.
RB301-S2
RIO Bus Interface Master Card
The target model in this page. The S2 style is associated with assembly S9751AU-02 and is identified as an RIO Bus Interface Master Card.
RB401-S4
RIO Bus module family
RB401 belongs to a different RIO interface family. Its presence in the same system environment does not make it a direct model-for-model substitute for RB301-S2.
PB301-S2
Parallel Bus Interface Module
PB301-S2 shares the 301 family numbering but has a different bus-interface role. The PB designation should therefore not be treated as equivalent to the RB designation.
SYSTEM-MATCHING PRIORITY
When replacing RB301-S2, verify the bus-interface function, the RB301 family designation, the S2 style and the associated S9751AU-02 assembly identification together. A visually similar card from another family may perform a different communication function.
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REQUEST RB301-S2 SUPPORT
Send the complete model and installed-system details for a focused quotation.
Part Number: RB301-S2 Associated Assembly: S9751AU-02 Quantity: Required quantity Destination: Delivery country / city Required Date: Target arrival date Machine / System: CENTUM / RIO installation
Please contact us within 7 days if you have any question after you receiving the items.
02
The returned items has to be in its original condition, specific reason for the return, we will issue a return or replacement for your order after we received the returns.
03
The buyer is responsible for all the shipping cost incurred.
RB301-S2 PURCHASING FAQ
Five practical checks for replacement and system-matching decisions.
01 · Why does the complete RB301-S2 designation matter when replacing an existing RIO interface card?
The S2 style is part of the model identification. RB301 is the family designation, while S2 identifies the specific style. The associated assembly S9751AU-02 is also used with RB301-S2. Matching only the RB301 family name can therefore leave an important identification detail unresolved.
02 · Is RB301-S2 an I/O channel module or a communication interface?
RB301-S2 is identified as a RIO Bus Interface Master Card. Its principal role is communication between the control-system side and the remote I/O architecture. It should not be selected simply as a substitute for an analog or digital I/O card because the communication function is different.
03 · Can RB301-S2 be replaced by another RB301 style without checking the installed system?
A different RB301 style should not be assumed to be interchangeable solely because the base number is RB301. RB301-S1 and RB301-S2 are distinct style designations. For a replacement order, the installed style and associated assembly identification should be matched before substitution.
04 · What should be checked when an RB301-S2 card is being sourced for a CENTUM CS or CENTUM VP installation?
The practical checks are the control-system generation, the RIO communication architecture, the exact RB301-S2 style and the associated S9751AU-02 assembly identification. These details help distinguish a correct RIO interface requirement from other CENTUM communication or I/O cards.
05 · Why should the RB301-S2 assembly number S9751AU-02 be included in a sourcing request?
The assembly identifier provides an additional identification point for the specific RB301-S2 configuration. Including both “RB301-S2” and “S9751AU-02” in a purchasing request reduces ambiguity when several RB301-family or related interface assemblies are being considered.
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