Metso D201129 Control Module

Product Information

• Brand: Metso (Valmet)
• Model: D201129
• Series: DNA / D20 DCS I/O family
• Type: Digital Output Module (DO / DO8 / D08P type)
• Channels: Typically 8 digital output channels
• Output type: 24V DC switching outputs (relay or transistor type depending variant)
• Installation: Rack / backplane plug-in module

What it actually does

This module is used to send ON/OFF control signals from the DCS system to field equipment, such as:

• Solenoid valves
• Motor starters (via relays)
• Indicator lights
• Actuators
• Small control loads

It works as a “digital switching interface between DCS system and field devices.”

System Role (Simple)

DCS controller
→ D201129 digital output module (this unit)
→ ON/OFF 24V signal output
→ field device (valve / relay / motor control / alarm light)

Key Features

• 8-channel digital output control
• Industrial 24V DC switching signals
• Opto-isolated channels for noise protection
• High reliability for continuous 24/7 operation
• Plug-in rack module for DCS backplane systems
• Designed for Metso DNA / Valmet automation architecture

Typical Applications

• Pulp & paper production lines
• Oil & gas process systems
• Chemical plant control systems
• Power plant auxiliary equipment
• Water treatment automation
• Industrial machine ON/OFF control

Advantages

• Reliable ON/OFF control for field devices
• Stable operation in harsh industrial environments
• Modular replacement inside DCS rack
• Long lifecycle industrial design
• Seamless integration with Metso DNA system

Important Notes

• Not PLC CPU ❌
• Not analog module ❌
• Not sensor ❌
• Not power supply ❌
• It is a DCS digital output (DO) module ✔

Precautions

• Must be installed in compatible Metso/Valmet DNA rack system
• Not interchangeable with analog I/O modules (AI/AO)
• Requires correct backplane configuration
• Wiring must follow 24V DC industrial standards
• Revision differences (D201129 / D201129L / DO8 variants) may exist
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