Product Overview

The Metso D100789, also known as IPU-2 power unit module, is a critical rack-mounted power supply module developed by Metso Automation for its legacy distributed control systems. Designed to provide stable, regulated DC power to backplane communication boards, I/O modules and controller hardware within the automation rack, this unit ensures continuous power delivery for process control equipment in demanding industrial environments. It serves as the core power infrastructure for Metso process automation platforms widely deployed in pulp & paper, mining, chemical and marine automation facilities.

 

Core Hardware & Functional Characteristics

• Official designation: D100789, model series IPU-2 power unit
• Converts input AC voltage into multi-channel isolated DC output for rack backplane power distribution
• Built-in overvoltage, overcurrent and short-circuit protection mechanisms to prevent downstream module damage
• Comprehensive hardware self-diagnostic system; front panel LED indicators display power status, load condition and fault alarms for rapid on-site troubleshooting
• Robust industrial construction with conformal-coated printed circuit board, resisting humidity, dust and temperature fluctuations inside control cabinets
• Standard rack plug-in design, supporting hot-swap capability within compatible redundant rack configurations to minimize plant downtime during maintenance
• Strict EMC compliance, minimizing electrical interference to adjacent control and communication modules
• Manufactured in EU, fully matched to original Metso automation rack mechanical dimensions and backplane pin definitions

Typical Application Scenarios

The D100789 IPU-2 power unit module is primarily used for maintenance and retrofit of legacy Metso automation systems:

• Pulp and paper mill process control racks
• Mining and mineral processing plant automation control systems
• Chemical, petrochemical and wastewater treatment process facilities
• Marine vessel machinery control and safety monitoring systems
• Spare replacement for original power units in existing Metso DCS rack assemblies

 

Sourcing & Commissioning Guidelines

1. Full part number D100789 (IPU-2) must be fully verified before procurement. Different power unit variants have different output specifications and backplane pinouts and cannot be directly interchanged.
2. ESD anti-static protection is mandatory when handling the module to avoid circuit component damage.
3. Confirm rack power input specifications and backplane compatibility before installation.
4. After insertion, complete power-on test, load verification and check communication status of all connected rack modules.
5. In redundant power setups, test automatic load switchover function to guarantee uninterrupted system operation.

 

Common Field Faults

• Intermittent system restarts: aging internal capacitors or unstable power output under heavy load
• Complete rack power failure: internal short-circuit protection triggered or power circuit breakdown
• Persistent fault LED alarm: abnormal input voltage or overload caused by faulty downstream I/O modules
• Random communication errors: insufficient power supply capacity or degraded output filtering