The Yokogawa RB401 is a Remote I/O (RIO) Bus Interface Module designed for Yokogawa's CENTUM VP and CENTUM CS 3000 distributed control systems (DCS). It serves as the communication bridge between field-mounted RIO stations and the central control units, enabling high-speed data transmission across distributed process control architectures.
Item No :
RB401Order(MOQ) :
1Payment :
EXWProduct Origin :
JapanShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
3kgPRODUCT INFORMATIOM
RB401 RIO Bus Module
| Brand Name: | Yokogawa | Condition: | 100%New And Original |
| Product Name: | RB401 | Warranty: | 1Year |
| MOQ: | 1Piece | Packing: | Original Packing |
OVERVIEW
The Yokogawa DCS MODULE is an input/output module designed by Yokogawa for its CENTUM series of distributed control systems (DCS).
These modules offer high performance and a wide range of functions to meet the needs of a wide range of control systems. As an important part
of the CENTUM system, Yokogawa DCS MODULE plays a key role in the field of industrial automation and process control.
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Q1: What is the Yokogawa RB401 used for?
According to the most credible sources, it is a RIO Bus Interface Module for Yokogawa CENTUM VP / CS 3000 DCS systems, connecting remote I/O stations to central controllers over the proprietary RIO bus .
Q2: What are the exact specifications?
No official Yokogawa datasheet is available in the search results. Third-party sources provide wildly conflicting data (transfer rates of 2 Mbps vs. 10 Mbps, power of 5 W vs. 25 W, weights of 0.3 kg vs. 0.55 kg). You must obtain the official Yokogawa datasheet for the exact order variant before making any decision.
Q3: Is the RB401 a master or slave interface?
Sources conflict. Some describe it as a "Master Card" , others as a "Slave Interface Card" . This distinction is critical for system design and must be clarified with Yokogawa.
Q4: What is the difference between RB401 and RB401-S4?
The "S4" suffix appears in some listings as a Style 4 variant with potentially different specifications (e.g., 10 Mbps transfer rate, 0.45 kg weight) . The relationship between the base RB401 and suffix variants must be confirmed with Yokogawa.
Q5: Does the RB401 support hot-swap?
One source indicates it supports hot-swap in compatible base units . Verify this against official documentation.
Q6: Is this a current or legacy product?
The RB401 is associated with CENTUM VP / CS 3000 systems, which are mature platforms. Confirm current product status and availability with Yokogawa or an authorized distributor.
Q7: Where can I get technical documentation?
Official Yokogawa documentation is essential. The third-party search results are unreliable and contradictory. Contact Yokogawa or an authorized distributor directly.
| Model | Description | When to Choose |
|---|---|---|
| RB401 | RIO Bus Interface Module (base variant) | When replacing or stocking spares for existing CENTUM installations (confirm exact variant and availability) |
| RB401-S2 | Style 2 variant (per some listings) | When a specific Style 2 revision is required (confirm with Yokogawa) |
| RB401-S4 | Style 4 variant (per some listings) | When a specific Style 4 revision is required (confirm with Yokogawa) |
| AIP512 | RIO Bus Connection Module (documented in previous response) | When a verified RIO bus coupler specification is available from Yokogawa |
| Newer CENTUM VP modules | Current-generation RIO/ESB interface modules | When a current-production replacement is required for new installations or upgrades (consult Yokogawa) |
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