The Yokogawa EC401-10 S3, also cataloged as the EC401 ESB Bus Coupler Module, operates as a dedicated hardware component for high-speed node expansion communication within Field Control Unit (FCU) architectures.
Suffix Breakdown & Model Matrix
Parameter / Suffix Code
Specification Breakdown
Base Model (EC401)
ESB Bus Coupler Module for Field Control Unit
Safety / Function (-10)
Standard operational specification code
Style Code (S3)
Style 3 hardware revision level
Hardware Specifications
Parameter
Specification
Model
EC401-10 S3
Brand
Yokogawa
Origin
Japan
Weight
0.24 kg
Dimensions
32.8 mm x 129.5 mm x 130 mm
Operating Temp
-10 to 60 deg C
Power Consumption
5 VDC backplane bus draw, 0.5 A current consumption
Transmission Speed
128 Mbps
Transmission Distance
Maximum 10 m
Node Capacity
Connects up to 9 units
4-20 mA HART Loop Protocol & Channel Isolation
The module provides high-speed differential signal propagation while maintaining physical signal isolation between the host Field Control Unit and downstream extension node buses. Dedicated filtering components attenuate high-frequency electromagnetic interference across the 128 Mbps data line, ensuring error-free frame delivery for process variables originating from field devices operating on 4-20 mA HART loop protocol instruments. Integrated cold junction compensation (CJC) processing references from peripheral I/O cards are relayed across the bus without latency degradation.
Frequently Asked Questions
Q: What is the maximum allowable distance for the ESB bus network connected through the EC401-10 S3?
A: The total transmission cable distance between the FCU and the furthest connected node unit must not exceed 10 m.
Q: How many node units can be connected to a single EC401-10 S3 module?
A: A maximum of 9 node units can be connected in daisy-chain topology per module pair.
Field Installation Guidelines
Seat the EC401-10 S3 module into the designated coupler slot of the Field Control Unit chassis, ensuring complete connector mating before securing the top and bottom mounting screws to 0.5 Nm torque. Connect specified dedicated ESB bus cables between the module interface port and the node expansion units, observing the 10 m total length restriction. Maintain signal wiring separation of at least 150 mm from AC power distribution lines. Ensure cabinet operating ambient temperatures remain strictly within the -10 to 60 deg C operational range.
