Description

Yokogawa ABC11D-A2123 Dual-Redundant Bus Converter

The Yokogawa ABC11D-A2123, also cataloged as the ABC11D Dual-Redundant Bus Converter, operates as a dedicated hardware component for connecting Human Interface Stations (HISes) on V net to other CENTUM system network buses. It provides dual-redundant communication paths and hardware failover to maintain uninterrupted data exchange between control nodes.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa ABC11D-A2123
Origin	Japan
Weight	0.6 kg
Dimensions	Standard 19-inch rack mount
OperatingTemp	0 to 50 degC
PowerConsumption	100-120 VAC: 320 VA220-240 VAC: 320 VA24 VDC: 7.5 A
PowerSupplyOptions	100-120 VAC, 50/60 Hz220-240 VAC, 50/60 Hz24 VDC
ProcessorStatusContact	Contact opens at CPU abnormality; rating 30 VDC, 0.3 A or less
Redundancy	Dual-redundant bus and power modules
NetworkInterface	V net communication to CENTUM VP/CS 3000 systems

Process Control Network Features

The ABC11D-A2123 implements channel-to-channel isolation for all bus lines, ensuring electromagnetic interference (EMI) from process field devices does not propagate to supervisory control nodes. Loop signals, including 4-20 mA and HART communication, are electrically segregated per channel, and the system supports cold junction compensation (CJC) for thermocouple inputs integrated within the DCS network interface. FOUNDATION Fieldbus and Profibus PA protocol signals can pass through the converter without degradation due to its galvanically isolated architecture.

Frequently Asked Questions

Q: What is the failover time between primary and secondary bus lines?
A: Automatic switchover occurs within a single bus cycle to maintain continuous HIS connectivity.

Q: Can the ABC11D-A2123 modules be hot-swapped?
A: Only specific power supply and communication modules are hot-swappable; the CPU and primary bus modules require system shutdown for replacement.

Q: Does the converter support firmware updates in the field?
A: Firmware updates are supported via the connected CENTUM VP engineering station, with care to maintain redundant bus configuration during the procedure.

Field Installation Guidelines

• Ensure the 19-inch rack is grounded according to industrial IEC/ISA standards before module insertion.
• Maintain a minimum 50 mm spacing between the ABC11D-A2123 and other heat-generating components to allow sufficient airflow.
• Route communication and power cables separately to prevent EMI coupling; twisted-pair shielding is recommended for V net lines.
• Verify power supply voltages match the specified module suffix code (100-120 VAC, 220-240 VAC, or 24 VDC) before energizing the system.
• Use anti-static precautions when handling modules; avoid contact with exposed connectors.

Specifications

• Brand: Yokogawa

Advantages

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