Metso D201190 Control Module

Metso D201190 Control Module (AO4H – 4-Channel Analog Output HART Module)

 

The Metso D201190 is a Metso / Valmet DNA DCS analog output module, typically known as AO4H (Analog Output 4 channels with HART communication).

Product Information

• Brand: Metso (Valmet)
• Model: D201190
• Type: DCS Analog Output Module (AO4H)
• Channels: 4 × analog outputs
• Output signal: 4–20 mA
• Communication: HART overlay support
• System: Metso DNA / Valmet DCS platform
• Installation: Rack-mounted backplane module (not standalone PLC unit)

What it actually does

This module is used to send control signals from the DCS system to field devices, such as:

• Control valves
• Actuators
• Positioners
• Flow control devices

It outputs a precise 4–20 mA signal, and also supports HART digital communication for diagnostics and configuration.

System Role (Simple)

DCS controller system
→ D201190 AO4H module (this unit)
→ analog 4–20 mA signal
→ field device (valve / actuator)
→ process control loop feedback

So it acts like a “precision output driver for industrial process control loops.”

Key Features

• 4-channel analog output (4–20 mA standard)
• HART communication support (smart device integration)
• High accuracy control signal output
• Rack-based DCS architecture integration
• Continuous 24/7 industrial operation design
• Stable long-distance analog loop driving

Typical Applications

• Chemical process control plants
• Oil & gas refining systems
• Power plant automation
• Pulp & paper industry (Metso core industry)
• Water treatment systems
• Large-scale DCS control loops

Advantages

• High stability analog output for control loops
• Supports smart field devices via HART
• Easy integration into Metso DNA systems
• Reliable long-term industrial operation
• Reduces need for separate HART communicators

Important Notes

• Not PLC CPU ❌
• Not I/O input module ❌
• Not sensor ❌
• Not power supply ❌
• It is a DCS analog output (control signal) module ✔

Precautions

• Must be used in compatible Metso/Valmet DNA rack system
• Requires correct backplane configuration
• Field wiring must follow 4–20 mA loop standards
• HART function depends on system configuration
• Not interchangeable with PLC output cards