The Yokogawa EC401-10 S3, also cataloged as the EC402 or EC401 ESB Bus Coupler Module, operates as a dedicated hardware component for high-speed bus communication execution within CENTUM VP and ProSafe-RS control platforms. The unit interfaces up to 9 nodes across dual redundant Ethernet communication paths, transferring I/O data at rates up to 128 Mbps over max 10 m bus distances. Featuring 1500 VAC dielectric isolation and style S3 environmental build parameters, the module maintains deterministic real-time data flow across system backplane architectures.
| Parameter | Specification |
|---|---|
| Model | EC401-10 S3 |
| Brand | Yokogawa |
| Origin | Singapore / Japan |
| Weight | 0.24 - 0.40 kg (1.5 kg shipping weight) |
| Dimensions | Standard Yokogawa I/O rack slot footprint |
| Operating Temp | -20 to 60 deg C (S3 version tolerance) |
| Power Consumption | 400 mA to 0.5 A at 5 VDC (backplane powered) |
| Communication Protocols | Vnet/IP, Ethernet TCP/IP, ESB Bus |
| Bus Speed | 128 Mbps (I/O module data transmission) |
| Connectable Nodes | Max. 9 units |
| Transmission Distance | Max. 10 m |
| Isolation Voltage | 1500 VAC between communication and system logic for 1 minute |
Yokogawa process automation architectures mandate physical dielectric isolation to prevent stray field currents and ground loops from impacting backplane processing logic. The EC401-10 S3 maintains 1500 VAC withstand galvanic isolation between external network connections and internal system buses. When operating in hybrid control racks alongside 4-20 mA HART loop transmitters, this high dielectric isolation suppresses noise coupling and safeguards network frame timing across primary and secondary communication paths.
Q: What transmission speed and distance limits govern the EC401-10 S3 module? A: The module executes I/O data transfers at 128 Mbps across a maximum transmission distance of 10 m.
Q: How many node units connect to a single EC401-10 S3 module? A: The ESB bus interface supports connections for up to 9 node units within the system rack chain.
Q: What primary voltage powers the EC401-10 S3 hardware? A: The module operates directly from the 5 VDC backplane supply, drawing between 400 mA and 0.5 A during operation.
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