Supports a single ESB bus line or a dual-redundant pair when two matching modules are installed.
Overview
EC401-50 is the Yokogawa EC401 ESB Bus Coupler Module for N-IO/FIO, providing one ESB bus interface between a supported Field Control Unit and node units.
A single ESB configuration installs the module in FCU slot 7 with slot 8 covered or left as specified for the host generation. A dual-redundant ESB configuration uses modules in slots 7 and 8.
Yokogawa states that style S3 or later is required when EC401 is combined with processor module CP471; style information from the component tag is therefore part of compatibility control.
Specifications
| Manufacturer | Yokogawa |
|---|---|
| Exact model | EC401-50 |
| Module type | ESB Bus Coupler Module for N-IO/FIO, 1-port |
| Interface function | ESB bus |
| Connectable units | Maximum 9 supported units |
| Transmission speed | 128 Mbps for I/O module data transmission |
| Transmission distance | Maximum 10 m |
| Dedicated cable | YCB301 |
| Current consumption | 0.5 A |
| CP471 condition | EC401 style S3 or later |
Features
Connects supported FCUs to ANB10S, ANB10D and compatible optical ESB repeater modules within the documented unit limit.
Uses a dedicated short-distance ESB path intended for cabinet and local-node integration.
Component style is visible on the tag and must be included in project compatibility review.
Applications
- CENTUM VP Field Control Units requiring a one-port ESB link to FIO or node-unit assemblies.
- Dual-redundant ESB communication using a matched pair in FCU slots 7 and 8.
- Maintenance replacement where EC401 style, host FCU release and node topology are documented.
About IndustryParts
https://www.industryparts.com/Bus topology is treated as part of the item
IndustryParts reviews EC401-50 with its style code, slot assignment and connected-node map instead of quoting from the model alone.
- Style code retained
- Topology recorded
- Redundancy checked
Lifecycle
- Record style code, slot position, redundant partner and connected node inventory before removal.
- Preserve the existing YCB301 cable route and verify connector condition.
- Do not pair an unidentified style with CP471; S3 or later is required.
- Confirm ESB communications and node visibility after restoration.
FAQ
Q01Can EC401-50 be installed in any FCU slot?
No. Yokogawa specifies slot 7 for a single configuration and slots 7 and 8 for the redundant pair in the supported FCUs.
Q02What must be checked when EC401-50 is used with CP471?
Confirm that the EC401 component tag shows style S3 or later and verify the supported CENTUM VP release and FCU configuration.
Q03Can EC401-50 be replaced by EC402?
Do not assume so. EC402 is a two-port variant and topology, FCU support, cabling and project configuration must be reviewed before any change.
Q04What topology evidence should accompany an EC401-50 enquiry?
Provide FCU model, software release, slot assignment, redundancy status, EC401 style, node list, YCB301 routing and diagnostics.
Q05What proves an EC401-50 exchange is complete?
Both the module and redundant partner should be healthy, all expected nodes visible, ESB diagnostics clear and the control-system change record approved.
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