Emerson A6210 dual-channel position monitor module for AMS 6500 Machinery Health Monitor, supports thrust position, differential expansion and rod drop measurement, API 670 compliant turbomachinery protection spare for steam turbines and compressors.

Product Overview

• Part No: A6210
• Brand: EMERSON (EPRO)

• Category: Dual-Channel Thrust / Differential Expansion / Rod Position Monitor Module A6210 is a single-slot plug-in monitor module designed for Emerson AMS 6500 Machinery Health Monitor system and fully compliant with API 670 machinery protection specifications. It receives differential signals from non-contact eddy current proximity probes and supports three configurable measurement modes: shaft thrust position, rotor differential thermal expansion, and reciprocating compressor rod drop/rod position. The module continuously measures axial displacement and thermal expansion of rotating equipment. Measured values are compared with configurable alert and danger setpoints to trigger relay outputs for machinery protection interlocks. Buffered raw sensor signals, 4–20mA and 0–10VDC analog outputs are provided for data transmission to DCS control systems. Front panel LED indicators display channel status, alert and danger alarms for on-site inspection. Hot-swap capability enables online replacement without system shutdown. It acts as critical maintenance spare for power plants, oil & gas and petrochemical turbomachinery monitoring systems.

• 
  

Core Features

• Two independent differential input channels for eddy current proximity transducers
• Three switchable operating modes: Thrust Position, Differential Expansion, Rod Position
• Supports tandem, complementary and cone/ramp measurement configurations
• Configurable alert and danger alarm thresholds with adjustable time delay and hysteresis
• Buffered raw sensor signal outputs for offline signal 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 including sensor open-circuit and short-circuit detection
• RS-232 interface for password-protected module configuration and status retrieval
• Hot-swap supported for online maintenance without system interruption
• Compact 3U single-slot DIN Eurocard form factor to save cabinet space

• Rugged hardware design meeting strict industrial EMC and vibration standards

• 
  

Technical Specifications

• Input Type: Differential eddy current proximity probe signal
• Channel Count: 2 independent measurement channels
• Frequency Range: 0–8 Hz (-3dB at 10 Hz)
• Sensor Supply: -26.7 VDC, nominal 20mA, max 35mA
• Analog Output: 0/4–20mA DC, 0–10VDC
• Measurement Accuracy: ±1% of full scale
• Power Consumption: Max 6W, 250mA @ 24VDC
• Communication: RS-232 for configuration
• Form Factor: 3U single slot for AMS 6500 rack
• Operating Temperature: 0°C ~ +65°C
• Storage Temperature: -30°C ~ +85°C

• Protection Class: IP20 when installed inside control cabinet

• 
  

Compatibility & Application

• Compatible with Emerson AMS 6500 Machinery Health Monitor rack system
• Matches PR6422, PR6423, PR6424, PR6425 series eddy current proximity sensors
• Widely deployed in thermal power plants, combined-cycle facilities, oil & gas and petrochemical industries
• Applied for axial thrust protection, rotor differential expansion monitoring of steam turbines, gas turbines, centrifugal compressors, and rod drop monitoring for reciprocating compressors