Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System
Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System - Image 2
Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System - Image 3
Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System - Image 4

Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System

  1. A6110 (Dual‑channel relative shaft vibration monitor, eddy‑current probe input)
  2. A6125 (Dual‑channel piezoelectric accelerometer‑based casing‑vibration monitor)
  3. A6310 (Speed / Keyphasor monitor module)
  4. A6410 (Shaft axial‑thrust position monitor)
  5. A6760 (AMS6500 rack power‑supply unit)
  6. PR9266 (EPRO electro‑dynamic velocity seismic sensor)
  7. A6824 (Multi‑channel relay output module)

 

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Description

Emerson EPRO A6120 Dual‑Channel Case Seismic Vibration Monitor Module for AMS 6500 / CSI 6500 TSI Machinery Protection System

 

Product Details

A6120 is single‑slot 3U plug‑in monitor module for Emerson AMS 6500 machinery health system, originally manufactured by EPRO (Germany). Origin: Germany. Lifecycle status: EOL discontinued, OEM new production ended; market supply includes NOS surplus and fully‑tested refurbished spare‑parts for power‑plant and petrochemical rotating‑machinery maintenance。

  • Channels: 2 independent galvanically‑isolated differential input channels for electrodynamic velocity seismic sensors
  • Compatible sensors: PR9266 / PR9267 / PR9268 electro‑dynamic velocity pick‑ups
  • Frequency response: Low‑cut 1 Hz / 5 Hz selectable; high‑cut adjustable 50 Hz‑2000 Hz
  • Measurement: Casing absolute vibration velocity (mm/s RMS), displacement peak‑peak
  • Alarm setting: Dual set‑point Alert / Danger, configurable hysteresis; 4 built‑in relay outputs for alarm & trip logic
  • Analog outputs: Per‑channel 4‑20 mA / 0‑10 VDC proportional output; front‑panel BNC buffered raw signal output for diagnostics
  • Communication: RS232 / RS485 Modbus‑RTU for configuration, trending and fault read‑back
  • Power: Powered via AMS6500 rack backplane, typical power consumption ≤6 W
  • Hot‑swap capable; sensor loop fault detection; password‑protected parameter configuration
  • Operating temperature: 0℃ ~ +65℃, storage‑40℃ ~ +85℃, humidity 5‑95 % non‑condensing
  • Mechanical: 3U single‑slot for IMR6000/20 chassis; weight approx 0.40 kg

 

Applications

‑ Steam turbine, gas turbine, centrifugal compressor bearing‑housing absolute casing‑vibration monitoring (API‑670 compliant) ‑ Power‑plant combined‑cycle unit TSI protection system ‑ Petrochemical turbo‑machinery, large feed‑pump condition‑based monitoring ‑ Transmit casing‑vibration measurements to DCS / SCADA via 4‑20 mA or Modbus‑RTU ‑ Retrofit & spare‑part replacement for existing AMS 6500 installations ‑ Spare inventory for rotating‑machinery maintenance department

A6120

Related Series Models (6+)

  1. A6110 (Dual‑channel relative shaft vibration monitor, eddy‑current probe input)
  2. A6125 (Dual‑channel piezoelectric accelerometer‑based casing‑vibration monitor)
  3. A6310 (Speed / Keyphasor monitor module)
  4. A6410 (Shaft axial‑thrust position monitor)
  5. A6760 (AMS6500 rack power‑supply unit)
  6. PR9266 (EPRO electro‑dynamic velocity seismic sensor)
  7. A6824 (Multi‑channel relay output module)

 

Key Features

  1. Dual‑channel case‑seismic monitor dedicated for electro‑dynamic velocity pick‑ups, fully API‑670 compliant for critical rotating‑machinery protection。
  2. Galvanically‑isolated differential inputs suppress common‑mode noise in heavy‑industrial plant environment.
  3. Independent Alert / Danger alarm thresholds with adjustable hysteresis, relay outputs for machinery alarm and trip interlock.
  4. 4‑20 mA / 0‑10 VDC analog outputs plus front‑panel BNC buffered raw‑vibration signal for spectrum‑analysis diagnostics.
  5. RS485 Modbus‑RTU interface upload real‑time measurements, alarms and fault diagnostics to plant DCS/SCADA.
  6. Hot‑swappable; sensor‑loop fault monitoring; password‑protected configuration prevents unauthorized modification.
  7. Captures start‑up / coast‑down transient vibration data for rotor‑dynamic analysis.
  8. Manufactured in Germany; EOL obsolete, only NOS or fully‑tested refurbished spare‑parts available.

 

Main Functions

  1. Receive signals from electro‑dynamic seismic velocity sensors mounted on bearing housings, measure casing absolute vibration velocity and displacement.
  2. Compare measured vibration values against configurable Alert/Danger set‑points and drive relay outputs for alarm or machinery‑trip protection logic.
  3. Convert casing‑vibration measurements to standardized 4‑20 mA / 0‑10 VDC analog signals for DCS/SCADA acquisition.
  4. Provide buffered raw vibration signal output for external vibration‑analysis instruments for fault diagnosis.
  5. Upload real‑time measured values, alarm status and module self‑diagnostic information via Modbus‑RTU.
  6. Detect sensor cable open‑circuit / short‑circuit faults and report failure alarms.
  7. Record transient vibration waveforms during machine start‑up and coast‑down for post‑event analysis.
  8. Serve as casing‑absolute‑vibration monitoring unit inside Emerson AMS 6500 TSI protection rack.

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