Description
Core Product Summary
The Yokogawa EB401-10 (Model EB401) is an ER Bus Interface Master Module designed for Yokogawa’s CENTUM CS 3000 and CENTUM VP Distributed Control System (DCS) architectures. Occupying a dedicated module slot in ESB bus node units or Field Control Units (FCUs), the module provides high-speed, deterministic 10 Mbps ER bus communications linking local control nodes with remote ER bus node units.
Constructed for high-reliability process control applications, the EB401-10 features a physical 10BASE2 coaxial interface utilizing a BNC connector port. Installing dual EB401-10 modules in a host control node enables full dual-redundant ER bus communication across distributed field instrument racks.
Key Technical Specifications
| Technical Parameter | Specification Detail |
| Brand / Manufacturer | Yokogawa Electric Corporation |
| Model / Suffix Code | EB401-10 (Model EB401, Suffix -10) |
| Control System Platform | CENTUM VP / CENTUM CS 3000 DCS |
| Module Category | ER Bus Interface Master Module (FIO) |
| Physical Layer Interface | IEEE 802.3 10BASE2 (1 BNC port) |
| Communication Speed | 10 Mbps |
| Transmission Distance | Up to 185 m (using YCB141 coaxial cable) |
| Current Consumption | 0.7 A |
| G3 Environmental Option | ISA Standard G3 conformal coating (-10 suffix code) |
| Unit Weight & Dimensions | 0.3 kg; 130 mm (H) x 32.8 mm (W) x 144.65 mm (D) |
Engineering Selection Highlights
- Deterministic Field Node Bridging: Establishes a direct 10 Mbps IEEE 802.3 10BASE2 communication link from local field control units to remote ER bus I/O node units.
- Hardware Bus Redundancy: Pairing two EB401-10 modules in a single node unit creates a dual-redundant ER bus communication topology.
- ISA Standard G3 Protection: The “-10” suffix code designates internal circuit board conformal coating conforming to ISA G3 environmental standards for harsh processing atmospheres.
- Standardized BNC Connection: Utilizes standard BNC interface hardware with supplied T-connectors and 50-ohm line terminators to form a stable coaxial bus topology.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Host Control Hardware | ESB Bus Node Units (ANB10S, ANB10D) and Compact Field Control Units (AFF50S/D, AFV10S/D) | Module slides directly into designated communication slots on the local node baseboard. |
| Remote Bus Node Hardware | ER Bus Node Units (ANR10S, ANR10D) | Interfaces with remote slave interface modules across the coaxial ER bus segment. |
| Interconnect Cabling | YCB141 10BASE2 Coaxial Cable | Bus segments require YCB146 T-connectors and YCB148 bus terminators at line endpoints. |
| Control Software | Yokogawa System Generation / CENTUM Engineering Suite | Configured via system hardware definition tables during DCS project deployment. |
EB401-10
EB401-10
Dimensions, Mounting & Connection Notes
- External Dimensions: 130 mm (Height) x 32.8 mm (Width) x 144.65 mm (Depth).
- Mounting Mechanism: Card-edge alignment rails with locking screws that seat into the host FIO node backplane.
- Front Panel Interface: One front-facing BNC coaxial port for connection to the ER bus network.
- Bus Termination: Requires attachment of a 50-ohm BNC line terminator if the module sits at the physical endpoint of an ER bus cable run.
Detailed Product Overview
The Yokogawa EB401-10 (Model EB401) is an ER Bus Interface Master Module engineered to expand signal I/O architectures in CENTUM VP and CENTUM CS 3000 DCS networks. Installed directly within an ESB bus node unit or Compact Field Control Unit (FCU), the card serves as the master communication link to remote ER bus node units housing Field Interface I/O (FIO) modules.
Operating at a transmission rate of 10 Mbps over a 10BASE2 coaxial physical layer, the EB401-10 maintains deterministic data synchronization between controller memory and field I/O channels. Dual modules can be combined in a single node to establish a fault-tolerant, dual-redundant ER bus architecture. The “-10” suffix variant indicates compliance with ISA Standard G3 conformal coating specifications, shielding the internal board electronics against airborne corrosive gases and harsh industrial environmental conditions.
Applications & System Role
The Yokogawa EB401-10 operates as an ER bus master controller within CENTUM CS 3000 and CENTUM VP distributed control systems. Situated in local Field Control Units (FCUs) or ESB expansion nodes, the module extends the system’s I/O capacity by transmitting real-time process inputs and control commands to distant ER bus remote I/O racks.
It is widely deployed in continuous processing facilities—such as oil refineries, petrochemical complexes, power stations, and chemical plants—where remote I/O nodes are distributed across field cabinet rooms away from the central control unit.
FAQ
What is the primary function of the Yokogawa EB401-10?
The EB401-10 is an ER Bus Interface Master Module that connects host Field Control Units (FCUs) or ESB node units to remote ER bus I/O nodes.
What DCS platforms use the EB401-10?
It is designed for Yokogawa CENTUM VP and CENTUM CS 3000 distributed control systems.
What physical interface does the EB401-10 use for network wiring?
The module utilizes a 10BASE2 coaxial physical layer equipped with a BNC connector port.
What does the “-10” suffix in the model code specify?
The “-10” suffix indicates that the module features ISA Standard G3 conformal coating for environmental protection against corrosive atmospheres.
Does the EB401-10 support dual-redundant bus configurations?
Yes, installing two EB401-10 modules in the same local node enables full dual-redundant ER bus operation.
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