The EC401 is an ESB Bus Coupler Module used to connect a Field Control Unit and Node Units through the ESB bus in Yokogawa FIO architectures. It provides the ESB bus interface required for distributed I/O communication and can be arranged as a single or dual-redundant bus configuration.
CORE FUNCTION
ESB BUS INTERFACE
FIO field-control architecture
Single-port ESB bus coupler
Maximum 9 connectable units
TRANSMISSION
128 Mbps
DISTANCE
10 m max.
CURRENT
0.5 A
WEIGHT
0.24 kg
NODE CAPACITY
Up to 9 units
ENGINEERING PROFILE
EC401-50 / ESB CONNECTION ARCHITECTURE
Bus Interface Role
EC401 provides the ESB bus interface between the Field Control Unit and connected Node Units. Within the FIO architecture, it forms the communication point through which I/O module data is transmitted over the ESB bus.
Function
ESB bus interface
Connectable units
Maximum 9
I/O transmission
128 Mbps
Maximum distance
10 m
Current consumption
0.5 A
Weight
0.24 kg
◇
System Placement
For a non-redundant ESB bus configuration, the EC401 is installed in the 7th slot of the applicable FIO Field Control Unit and the 8th slot is covered by a dummy module.
For dual-redundant ESB bus operation, EC401 modules are installed in both the 7th and 8th slots.
SLOT LOGIC
SLOT 7
+
SLOT 8
SIGNAL PATH
FIELD CONTROL UNIT → ESB → NODE UNITS
CONTROL SIDE
FIELD CONTROL UNIT
FIO architecture
→
COUPLING POINT
EC401-50
ESB Bus Coupler Module
→
FIELD SIDE
NODE UNITS
Up to 9 connected units
SAME FAMILY / DIFFERENT ROLE
EC401 & EC402
EC401
ESB Bus Coupler Module for FIO
EC401 is the single-port ESB coupling solution used to connect the Field Control Unit with Node Units in the FIO architecture.
VS
EC402
ESB Bus Coupler Module for AFV30□ / AFV40□
EC402 is the two-port variant intended for the specified AFV30□ / AFV40□ Field Control Unit configurations. The selection therefore depends on the FCU architecture and required ESB arrangement.
Configuration checkpoint
When replacing an existing EC401 assembly, confirm the Field Control Unit family, slot position, redundancy arrangement, and component style before installation. For SEM operation over Vnet/IP, the EC401 requirement is style 2 or later.
PURCHASE & ENGINEERING SUPPORT
Need EC401-50 for an existing FIO system?
Send the exact part number, required quantity, destination, required date, and machine or system details. Our team can help verify the requested configuration before order processing.
Can EC401-50 be used in a redundant ESB arrangement?
Yes. For dual-redundant ESB bus operation, EC401 modules are installed in both the 7th and 8th slots of the applicable Field Control Unit. A non-redundant arrangement uses the 7th slot, with the 8th slot covered by a dummy module.
What should be checked when replacing EC401-50 in an existing system?
Check the Field Control Unit model, slot position, ESB redundancy arrangement, and component style. If SEM is required over Vnet/IP, the EC401 must meet the stated style requirement.
How many Node Units can EC401-50 support on the ESB connection?
The standard specification allows a maximum of 9 connectable units. The actual number depends on the FCS database and the particular system configuration.
Does EC401-50 have enough transmission capacity for its intended FIO role?
Its specified I/O module data transmission speed is 128 Mbps, with a maximum ESB transmission distance of 10 m. These values should be considered together with the actual system topology when planning a replacement.
Why does the EC401-50 style number matter for an upgrade?
The component style can affect compatibility with associated functions. In particular, Yokogawa specifies style 2 or later when EC401 is used with the Sequence of Events Manager for Vnet/IP, while later EC401 styles are required for compatibility with certain processor-module configurations. Verify the actual style number on the component before replacement.
Return / Replacement
ORDER CARE
Please contact us within 7 days if you have any question after you receiving the items.
The returned items has to be in its original condition, specific reason for the return, we will issue a return or replacement for your order after we received the returns.
The buyer is responsible for all the shipping cost incurred.
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