Emerson EPRO A6140 (9199-00058) dual channel shaft absolute vibration monitor for AMS6500 Machinery Health Monitor, API 670 compliant, calculates shaft absolute vibration by combining eddy current probe and seismic sensor signals, used for steam turbine, gas turbine and compressor machinery protection.

Product Overview

• Part No: A6140, 9199-00058
• Brand: EMERSON / EPRO

• Category: Dual Channel Shaft Absolute Vibration Monitor Module A6140 (9199-00058) is a single-slot 3U plug-in monitor module of Emerson AMS6500 Machinery Health Monitor system and fully complies with API 670 machinery protection standards. The module needs to match a combined sensor set consisting of eddy current proximity probe and casing seismic vibration sensor. It mathematically calculates shaft absolute vibration value to eliminate interference caused by bearing housing movement, which solves the measurement limitation of simple shaft relative vibration on sleeve bearing rotating equipment. Two independent measuring channels support synchronous monitoring of two bearing positions. Measured vibration values are compared with configurable Alert and Danger thresholds to trigger relay alarm outputs for machinery protection. Buffered sensor signals, 4–20mA and 0–10VDC analog outputs transmit real-time data to DCS control system. Front panel LED indicators display channel operating status and alarm conditions. Hot-swap capability supports online module replacement without system shutdown. It serves as critical maintenance spare for power plants, oil & gas and petrochemical turbomachinery protection systems.

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Core Features

• Two independent measuring channels for shaft absolute vibration monitoring
• Combined signal operation: eddy current probe (relative displacement) + seismic sensor (housing vibration)
• Software configurable measurement unit: peak-to-peak, zero-to-peak, RMS
• Adjustable Alert and Danger alarm thresholds with time delay and hysteresis setting
• Buffered raw sensor signal outputs for offline vibration spectrum analysis
• Dual analog output options: 0/4–20mA DC and 0–10VDC proportional signals
• Front panel LED indicators for channel OK, Alert and Danger alarm status
• Comprehensive self-diagnosis covering sensor open-circuit, short-circuit and module hardware faults
• Mini-DIN RS232 interface for password-protected module parameter configuration
• Hot-swap supported for online maintenance without interrupting protection function
• Compact 3U single-slot Eurocard form factor for AMS6500 rack installation

• Rugged industrial hardware meeting strict EMC and vibration standards for 24/7 continuous operation

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Technical Specifications

• Model Code: A6140, part suffix 9199-00058
• Channel Count: 2 independent measurement channels
• Measurement Principle: Combined relative displacement + casing vibration for absolute shaft vibration
• Frequency Response: 1 Hz ~ 5 kHz (-3dB)
• Measurement Accuracy: ±1% of full scale
• Analog Output: 0/4–20mA DC, 0–10VDC
• Power Consumption: Max 6W, 250mA @ 24VDC
• Communication: RS232 Mini-DIN interface for configuration
• Form Factor: 3U single slot for AMS6500 rack
• Operating Temperature: 0°C ~ +65°C
• Storage Temperature: -30°C ~ +85°C

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with Emerson AMS6500 Machinery Health Monitor rack system
• Matching sensors: PR6422 / PR6423 / PR6424 eddy current probes, matched proximitor CON series and seismic vibration sensors
• Widely deployed in thermal power plants, combined-cycle power stations, oil & gas and petrochemical industries
• Applied for shaft absolute vibration protection of steam turbines, gas turbines, centrifugal compressors and generator sets with sleeve bearings