Description

Yokogawa ABC11D Dual-Redundant Bus Converter

The Yokogawa ABC11D-A2123, also cataloged as the ABC11D Dual-Redundant Bus Converter, operates as a dedicated hardware component for deterministic control network bridging within CENTUM VP and CENTUM CS 1000 distributed control systems.

Hardware Specifications

Parameter	Specification
Model Brand	Yokogawa ABC11D
Origin	Japan
Weight	4.2 kg
Dimensions	482 mm x 310 mm x 133 mm
Operating Temp	0 to 50 degC
Power Consumption	110 W typical
Redundancy	Dual-redundant bus architecture
Data Transmission Rate	1 Mbps (Fieldbus side), 10 to 100 Mbps (Control network side)
Processor Status Output	Contact open on CPU abnormality
Contact Rating	30 V DC, 0.3 A max
Power Supply Options	100-120 V AC, 220-240 V AC, 24 V DC (model dependent)
Ambient Humidity	10% to 90% RH, non-condensing
Corrosion Protection	Optional ISA G3 conformal coating

Fieldbus Protocol Integration and Channel Isolation

The ABC11D supports FOUNDATION Fieldbus H1 and Profibus PA connectivity for integration with legacy field instrumentation. Channel-to-channel isolation is implemented to suppress ground loop currents and prevent cross-talk between redundant bus paths. Cold junction compensation is applied on connected analog input channels to maintain signal accuracy under variable ambient temperatures.

Frequently Asked Questions

Q: What is the hot-swap behavior during a redundant bus switchover?

A: The module maintains active communication through the alternate bus path without interruption; no process downtime occurs.

Q: Does firmware revision affect compatibility with existing CENTUM VP racks?

A: Firmware must match the installed CENTUM VP base software version; mismatched revisions may block network initialization.

Q: Are both power supply inputs required for full redundancy?

A: Yes. Both AC or DC supply rails must be energized to sustain uninterrupted operation during a single supply failure.

Field Installation Guidelines

Mount the ABC11D in a standard 19-inch rack using supplied brackets. Ensure secure grounding of the rack frame to the facility earth bus. Route control network cables separately from power wiring to minimize EMI coupling. Maintain minimum bend radius of 50 mm for all shielded twisted-pair cabling. Verify shield continuity at both ends and connect shields to designated earth terminals.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems