| YOKOGAWA / SB401-51 S1 | OverviewSpecificationsIntegrationRelated ModelsFAQ |
The extension-node interface that connects a node backplane to the upstream ESB bus coupler. It supports the configured redundant communication path between the Field Control Station and distributed I/O.
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FCS
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EC401
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SB401
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I/O
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| Primary role | ESB bus slave interface |
| Installed location | Extension or remote I/O node |
| Upstream partner | EC401 ESB bus coupler |
| Bus service | I/O and node communication |
| Redundancy | Dual module and dual path where configured |
| Maintenance feature | Module replacement with system-aware procedure |
| Suffix -51 | G3 environmental execution |
| Style | S1 |
| Q1 | Where is SB401 installed? | It is used at the node side of the ESB connection, while EC401 provides the controller-side coupling role. |
| Q2 | Is SB401 the same as SEC401? | No. Their bus roles and supported system architectures differ; match the complete installed topology. |
| Q3 | How is redundancy maintained? | Where the node is designed for redundant ESB service, retain both interface modules, cable paths and assigned slots. |
| Q4 | What does suffix -51 indicate? | It identifies the applicable standard execution with the ISA G3 environmental option. Confirm the full code and style. |
| Q5 | What should be checked after replacement? | Check module status, both bus paths, node communication, I/O health and controller diagnostics before returning the loop to service. |
| Q6 | What ordering details prevent mismatch? | Send the full model and style, node type, upstream coupler model, installed slot, quantity and clear nameplate images. |
| A413141 BIU82 | SAI143-H63 S4 | SNT501-13 |
| SNT521-53 | TM30050 | 05V-0070L |
| 103147 SAE-14 | AAI543-H53 S1 | NFDV551-P11 |
| MDH-L425-D | 02-681-339 | AAT145-S50 S1 |
| SNT401-53 | NFPW442-51 | CS-SS-RHR1HE-03 |
| 79835-66515 | 2711P-K6C20A | E24KN9ZCCM |
| 22TA-L4-SS | NFSB100-S01 | EPDM 76/DN80/3 |
| K9634DA K9634DA-01 | 71503-052130 | 0-57412-E |
| SPW481-13 | 1785-BEM | DCVR-3 SC-68224 |
| NFPW442-11 | 1784-PKTX | WMZT3D20T |
| 194r-c30-1753 | D200175 AP31 | SDV144-S33 S2 |
| ASS9981DE-02 | TM80125 | VPM-8100Q-000 |
| 1747-KFC15 | 1785-L60B/C | MSD5AZA1Y |
| VPM-8100LS-000 | 1771-SN | 4L-E4-C1A-TT |
| C98043-A7600-L1 | 2080-DNET20 | 11-018-164 |
| 2711P-K6C5D | NA50-40NAMKNN-CE | WR-D4001 |
| 140DAO85300 | 1769-L33ER | SDV144-S33 S2 |
| FIO-11 68679079 | EC401-51 | 1797-IE8NF |
| 81003-438-51-R | SNB10D-213 | ALR121-S51 S1 |
| NFDV561-P51 | 4L-L4-M2-B1A | MSD013A1Y |
Send the complete model, style, quantity, destination and clear nameplate photographs for a compatibility-focused quotation.
START YOUR INQUIRY| Returns and replacement Contact us within seven days after receipt if an issue occurs. Items must remain in their original condition and include the return reason. Refund or replacement is arranged after receipt and inspection; return shipping costs are the buyer's responsibility. |
Ordering details Provide quantity, destination, full model and style, installed system, slot, partner modules and clear nameplate photographs. Availability and lead time are confirmed with the quotation. |
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