DM‑20 Vibration Monitoring Module

The DM‑20 is a rack‑mounted vibration and displacement monitoring module used for rotating‑machinery protection systems. It receives input signals from proximity probes and velocity sensors, processes vibration amplitude, displacement and frequency data, and generates alarm and trip outputs for turbine, compressor and large rotating equipment protection loops.

This module features signal conditioning circuits, relay alarm outputs and front‑panel LED status indicators. It provides analog buffered output for connecting to DCS or recording devices. It acts as key aftermarket spare for maintenance, overhaul and retrofitting of power‑plant and petrochemical machinery‑monitoring cabinets.

Main Specifications

• Brand: Machinery monitor series; Model:DM‑20; Type: Vibration & Displacement Monitor Module
• Applicable System: Rotating machinery protection monitoring system for turbines, compressors and large motors
• Interface: Probe signal input, buffered analog output, relay alarm/trip contacts, status LED indicators
• Function: Sensor signal conditioning, vibration/displacement measurement, alarm threshold comparison, relay trip output
• Feature: Rack slot‑mount installation, on‑site threshold adjustment, buffered monitor output, hardware alarm latch function
• Installation: Slot‑mount installation inside machinery monitoring chassis
• Power: Module back‑plane power supply; Operating Environment:0℃ ~ +60℃, 5%‑95% RH non‑condensing
• Certifications: CE compliant for rotating‑machinery protection automation applications

Core Functions

• Condition raw signals from proximity probes or vibration velocity sensors installed on rotating equipment shafts.
• Calculate vibration amplitude and shaft displacement values, compare measured values against user‑configured alarm and trip thresholds.
• Drive relay contact outputs for local alarm or interlock trip signals to protect rotating machinery from excessive vibration damage.
• Provide buffered analog output to transmit process values to DCS, HMI or data‑recording systems for trend recording.
• Front‑panel LED indicators display normal, alarm and trip states for fast status reading and fault location during commissioning and maintenance.
• Standard slot‑mount structure supports quick replacement during monitoring‑cabinet overhaul and field‑troubleshooting work.

Application Scenarios

• Vibration and shaft‑displacement monitoring component for industrial rotating‑machinery protection systems.
• Critical spare‑part for power‑plant turbine, petrochemical compressor and large‑motor monitoring cabinets.
• Retrofit and spare replacement for legacy DM‑20 monitor‑module machinery‑protection‑system upgrade projects.
• Monitoring‑cabinet overhaul, vibration‑loop debugging and faulty monitor‑module replacement tasks.
• Spare‑parts inventory for machinery‑protection integrators and energy‑industry engineering contractors.

• Global aftermarket spare supply for technical teams maintaining rotating‑machinery monitoring automation hardware.