Description

ABB NU8976 HIEE220295R0001 PROFIBUS DP Communication & Integrated Power Module for S800 I/O System

Technical Specifications

• Product Model: NU8976 HIEE220295R0001
• Brand: ABB
• Warranty: One Year
• Input Voltage: 85–264 VAC universal AC input, 47–63Hz mains frequency
• Operating Temperature: 0°C to +65°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤20ms cyclic PROFIBUS DP data refresh cycle
• Protection Class: IP20 when fully installed inside industrial control cabinet
• Accuracy Class: Zero data loss cyclic fieldbus transmission, ±0.5% regulated DC output voltage tolerance
• Output Frequency: PROFIBUS DP fixed 1.5Mbps baud rate
• Rated Current Range: Total 10A maximum DC output load for S800 I/O rack backplane
• Communication Interface: PROFIBUS DP terminal bus port, internal S800 rack backplane connector
• Supported Protocols: PROFIBUS DP-V1 slave protocol, ABB S800 internal I/O bus protocol
• Overload Capacity: Built-in overvoltage, overcurrent, short-circuit and ESD surge protection, input fuse failure protection
• Dimensions: 185mm × 112mm × 45mm standard S800 rack plug-in module size
• 

Product Overview

The ABB NU8976 HIEE220295R0001 is a combined all-in-one unit integrating a PROFIBUS DP fieldbus communication adapter and a high-efficiency rack power supply, exclusively engineered for the ABB S800 modular distributed I/O subsystem within the 800xA DCS and AC 800M PAC control ecosystem. It undertakes two core core tasks simultaneously: converting wide-range industrial alternating current into stable isolated DC power to energize the entire S800 I/O rack, and acting as the PROFIBUS DP slave gateway to transmit all analog/digital I/O signals between the remote S800 field station and the central AC 800M controller.

This integrated module solves two prominent pain points of decentralized field I/O deployment. It eliminates the need for separate standalone power supply and communication adapter modules, reducing rack slot occupation, internal wiring complexity and potential hardware fault points. The PROFIBUS DP-V1 interface supports both cyclic real-time process data exchange and acyclic device diagnosis, parameter uploading and fault code reading, which greatly simplifies remote equipment troubleshooting. Its robust power regulation circuit resists voltage fluctuations and electromagnetic interference commonly found in power plants, petrochemical workshops and heavy industrial sites, while the pluggable hot-swap compatible design allows technicians to replace the module without powering down the entire field I/O station, avoiding unplanned production shutdowns.

DCS system integrators, plant instrumentation maintenance engineers and process control supervisors in thermal power generation, oil refining, chemical processing, pulp and paper, and metallurgical industries gain direct operational value from this component. It streamlines remote I/O cabinet layout, improves the overall stability of distributed control loops, shortens system commissioning and fault repair cycles, and reduces long-term spare part inventory costs for ABB 800xA automation platforms.