Emerson A6120 (9199-00002) dual-channel casing seismic vibration monitor for AMS6500, API670 compliant, monitors bearing housing vibration of rotating machinery.

Product Overview

• Part No: A6120, 9199-00002
• Brand: EMERSON / EPRO

• Category: Dual Channel Casing Seismic Vibration Monitor Module A6120 (9199-00002) is a single-slot 3U monitor module for Emerson AMS6500 Machinery Health Monitor system, fully compliant with API 670. It works with electrodynamic seismic sensors to continuously measure bearing housing absolute vibration. Two independent measuring channels support simultaneous monitoring of two machine positions. Users can configure Alert and Danger thresholds; the module triggers relay outputs once vibration exceeds set limits for machinery protection. It provides buffered raw sensor signals and configurable 4–20mA analog outputs to transmit real-time vibration data to DCS systems. Front panel LED indicators display channel status and alarms. Hot-swap function supports online replacement without interrupting rack protection logic. It serves as critical spare for steam turbines, gas turbines and centrifugal compressors in power, petrochemical and oil & gas plants.

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Core Features

• Two independent channels for casing seismic vibration measurement
• Matched with electrodynamic seismic vibration sensors
• Software configurable alarm thresholds with delay and hysteresis
• Buffered sensor output for offline spectrum analysis
• Configurable 4–20mA analog output for DCS interconnection
• Comprehensive diagnostics for sensor open/short circuit faults
• Front panel LED status and alarm indicators
• Hot-swappable for online maintenance
• Compact 3U Eurocard form factor for AMS6500 rack

• Rugged hardware meets strict industrial EMC standards

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Technical Specifications

• Model: A6120, part code 9199-00002
• Channel Count: 2 independent channels
• Frequency Range: Selectable bandwidth 10–1000Hz
• Measurement Parameter: Vibration velocity (mm/s RMS)
• Power Supply: 24VDC
• Operating Temperature: 0°C ~ +65°C
• Storage Temperature: -30°C ~ +85°C
• Humidity: 5%–95% non-condensing
• Form Factor: 3U single slot for AMS6500 rack

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with Emerson AMS6500 Classic monitor rack system
• Supporting sensors: EPRO series electrodynamic seismic transducers
• Widely used in thermal power plants, combined-cycle stations and petrochemical facilities
• Applied for bearing housing vibration protection of steam turbines, gas turbines and compressors