ABB 216AB61 16-Channel Analog Output Module

Product Overview

The ABB 216AB61 is a high-density analog output module designed for use within the S900 I/O system, a core component of the legacy but still widely operational Bailey INFI 90 and Symphony Harmony distributed control systems (DCS).

This module is responsible for converting digital control signals from the main processor into analog output signals (typically 4-20 mA or 0-10 VDC) to control field devices such as valve positioners, variable frequency drives (VFDs), actuators, and other final control elements. Its 16-channel capacity makes it a space-efficient and cost-effective solution for large-scale process automation in critical industries.

Key Features & Technical Specifications

• High Channel Density: Provides 16 independent analog output channels on a single module, maximizing cabinet space and reducing cost per point.

• Analog Output Types: Configurable for industry-standard signals including 4-20 mA (current) and 0-10 VDC (voltage), offering flexibility for various field devices.

• High Accuracy: Delivers precise output signals essential for accurate process control, ensuring stable operation of loops for pressure, flow, level, and temperature.

• S900 I/O Compatibility: Designed to be installed in a dedicated slot within an S900 I/O field baseplate, which provides power and communication to the module.

• INFI-NET Communication: Interfaces with the INFI 90 network via a corresponding Communication Module (e.g., NISB21 / NISP21) in the same fieldbus, facilitating data exchange with the control processor.

• LED Status Indicators: Features diagnostic LEDs for power and channel status, aiding in rapid troubleshooting and maintenance.

Typical Technical Data:

• Manufacturer: ABB (formerly Bailey Controls)

• Part Number: 216AB61

• Module Type: Analog Output (AO)

• Number of Channels: 16

• Output Signal: 4-20 mA / 0-10 VDC (configurable per channel)

• System Compatibility: Bailey INFI 90, Symphony DCS

• I/O System: S900 I/O

Primary Applications

The ABB 216AB61 module is deployed in continuous process industries where reliability and precision are non-negotiable. Key applications include:

• Power Generation: Controlling feedwater valves, fuel valves, and damper actuators in coal, gas, or nuclear power plants.

• Oil & Gas Refining: Regulating flow control valves in distillation columns, pipelines, and reactor feed systems.

• Chemical Processing: Managing ingredient dosing valves, reactor temperature control valves, and pressure relief systems.

• Water & Wastewater Treatment: Controlling chemical dosing pumps and flow valves.

• Pulp & Paper Mills: Regulating steam valves and consistency controls.

Compatibility & Integration

The 216AB61 module is designed exclusively for the ABB Bailey INFI 90 and Symphony DCS environments. It must be installed in an S900 I/O Field Baseplate (e.g., models like FB11S, FB21S). The entire S900 I/O branch communicates with the process controller through a Network Interface Module (NIM) and a Communication Module (COM) in the master module rack.

Commonly Associated Parts:

• S900 I/O Baseplates: FB11S, FB21S

• Power Supply Modules: MAS-11, MAS-21

• Communication Modules: NISB21, NISP21

• Processors: MFC01, MFC02, MFP02

Why is this Module Critical for Plant Operators?

Many power and process plants worldwide still rely on the robust and proven Bailey INFI 90 system. As these systems age, finding reliable spare parts like the 216AB61 becomes essential for:

• Minimizing Downtime: Having a working spare on the shelf is crucial for quick replacement during unplanned outages.

• Maintaining Safety: Ensuring control loops function correctly is vital for plant and personnel safety.

• Extending System Life: Using genuine or high-quality refurbished modules allows plants to extend the life of their existing DCS investment until a full migration is planned.

FAQs

Q: Is the ABB 216AB61 module new or refurbished?
A: [Vendor to specify] We offer fully tested and refurbished units that meet original specifications. All units come with a warranty.

Q: Can you provide configuration and wiring documentation?
A: Yes, we can typically provide datasheets, manuals, and wiring diagrams for this module upon request to assist your maintenance team.

Q: My system is a Symphony Harmony. Is this module compatible?
A: Yes, the S900 I/O system is backward compatible and used across both INFI 90 and Symphony Harmony DCS platforms.

Q: Do you offer repair services for faulty modules?
A: Yes, we often provide expert repair and recalibration services for faulty 216AB61 modules. Contact us for a repair quote.