YOKOGAWA EC402-51 ESB Bus Coupler Module, 2-Port, ISA Standard G3 Option
YOKOGAWA EC402-51 ESB Bus Coupler
2-Port ESB Bus Coupler Module
ISA Standard G3 Yokogawa Module
Place of Origin:
JAPAN
Brand Name:
Yokogawa
YOKOGAWA EC402-51 ESB Bus Coupler
,2-Port ESB Bus Coupler Module
,ISA Standard G3 Yokogawa Module
Yokogawa EC402-51 ESB Bus Coupler Module
The Yokogawa EC402-51 is an ESB Bus Coupler Module for compatible CENTUM VP control-system configurations. It provides a two-port ESB bus interface between the Field Control Unit and connected Node Units.
System FunctionProvides ESB bus master communication through upper-side and lower-side connector ports for compatible FIO/N-IO system configurations. |
Replacement ConsiderationsMatch the complete model designation, installed controller, bus arrangement, and required suffix options before ordering. |
Application & Failure Scenarios
EC402-51 is used in compatible Yokogawa CENTUM VP Field Control Unit configurations using FIO. A faulty bus coupler may disrupt communication with connected Node Units and affect the control or monitoring functions that depend on those nodes.
- Typical sourcing trigger: a reported bus coupler fault, an ESB communication problem, or planned replacement during maintenance.
- Before replacement: check the installed module label, Field Control Unit model, and single or redundant bus arrangement.
Technical Specifications
| Manufacturer | Yokogawa Electric Corporation |
|---|---|
| Model | EC402-51 |
| Product Type | ESB Bus Coupler Module |
| System Interface | ESB bus master interface |
| Port Configuration | 2-port; upper-side and lower-side ESB bus connections |
| Explosion Protection Code | -5: standard type without explosion protection |
| Environmental Option | Suffix 1: ISA Standard G3 option |
| Current Consumption | 0.5 A |
| Weight | Approximately 0.24 kg |
| External Dimensions | 32.8 × 129.5 × 130 mm |
Additional EC402 series specifications
| Connectable Node Units | Up to 9 units on each side under the specified standard conditions; confirm the applicable limit for the installed configuration. |
|---|---|
| I/O Module Transmission Speed | 128 Mbps |
| ESB Bus Transmission Distance | Up to 10 m per side under the stated series specifications. |
| Compatible FIO Field Control Unit Families | Includes AFV30S/D, AFV40S/D, A2FV50S/D and A2FV70S/D configurations. Check the system-specific compatibility requirements. |
| Redundant Configuration | Two EC402 modules can be used for a dual-redundant ESB bus in a compatible Field Control Unit configuration. |
EC402 Model Variants
The EC402 ordering designation uses suffix codes to identify the protection type and environmental option. The suffixes describe configuration differences, not guaranteed interchangeability.
| Model | Configuration |
|---|---|
| EC402-50 | Standard type without explosion protection; basic type. |
| EC402-51 | Standard type without explosion protection; ISA Standard G3 option. |
| EC402-E0 | Standard type with explosion protection; basic type. |
| EC402-E1 | Standard type with explosion protection; ISA Standard G3 option. |
For potentially explosive atmospheres, verify the required certification and installation conditions before selecting a variant.
Replacement & Ordering
Provide the full EC402 model suffix and a photo of the installed module label when requesting a replacement. Installation and engineering reference: Yokogawa EC402 General Specifications, GS 33J60E51-01EN.
Delivery & Warranty
| Inspection Model and condition checks before dispatch; functional testing subject to availability. | Packaging Protective industrial packaging; lead time and shipping terms confirmed by quotation. | Warranty & DOA Coverage and return terms confirmed in writing. Report suspected DOA items promptly with order details and supporting evidence. |
Request a Quotation
Please include Part Number, Quantity, Destination, Required Date, and Machine/System Model in your enquiry.
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AMIKON · Sourcing Support
Miya Zheng
Industrial automation spare parts sourcing and quotation support. +86 180 2077 6792
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Frequently Asked Questions
1. What is the function of the Yokogawa EC402-51?
It is an ESB Bus Coupler Module that provides the ESB bus master interface for compatible Field Control Unit and Node Unit configurations.
2. Which control system uses the EC402-51?
It is associated with compatible Yokogawa CENTUM VP configurations using FIO. Confirm the installed Field Control Unit and system architecture before ordering.
3. What is the difference between EC402-50 and EC402-51?
Both use the standard type without explosion protection. EC402-51 includes the ISA Standard G3 option, while EC402-50 is the basic type.
4. Can EC402-51 be used in a redundant ESB bus configuration?
The EC402 series supports dual-redundant ESB bus configurations in compatible Field Control Units. Confirm the controller and slot requirements before installation.
5. Where can I find the EC402-51 PDF or manual?
Use the official EC402 General Specifications PDF for the model suffixes, specifications, and dimensions. Refer to the installed system documentation for application-specific requirements.
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