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A6120

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Emerson A6120 is a dual-channel AMS 6500 case seismic vibration monitor for machinery protection applications.
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Technical specifications for A6120

  • Manufacturer:
    Emerson
  • Part Number:
    A6120
  • Product Family:
    AMS 6500 Machinery Health Monitor
  • Product Type:
    Dual-Channel Case Seismic Vibration Monitor
  • Stock:
    1
  • Channels:
    2 independent channels
  • Form Factor:
    3U, one-slot, hot-swappable module
  • Supported Sensors:
    PR9266, PR9267, PR9268 and compatible electromechanical sensors
  • Input Type:
    Differential, galvanically isolated
  • Input Impedance:
    >100 kΩ
  • Input Voltage Range:
    −5...15 V DC
  • Velocity Range:
    5...100 mm/s rms
  • Displacement Range:
    ±25...±500 µm
  • Measurement Frequency:
    10...1000 Hz
  • Selectable Filters:
    5...50 Hz; 10...50 Hz; 50...1000 Hz; 50...1600 Hz
  • Buffered Output:
    ±10 V at the front panel
  • Rear Outputs:
    0/4...20 mA and 0...10 V
  • Alarm Delay:
    0...5 s per channel; 0...36 s with A6740
  • Operating Temperature:
    0...65 °C
  • Storage Temperature:
    −30...85 °C
  • Relative Humidity:
    5...95%, noncondensing
  • Power Consumption:
    Maximum 6 W; 250 mA at 24 V DC
  • Dimensions:
    3.0 × 12.84 × 16.0 cm
  • Weight:
    0.32 kg
  • Tariff Code:
    9031809090
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Inputs Alarms Diagnostics Application
  • Two isolated measurement channels support independent case seismic vibration protection
  • A one-slot hot-swappable card integrates with the AMS 6500 machinery protection rack
  • Configurable signal conditioning, alarms, relays, and diagnostics support critical rotating assets

Emerson A6120 converts velocity-sensor signals into monitored vibration values for two independent machinery channels.

The module combines signal conditioning, limit comparison, alarm logic, analog outputs, and self-diagnostics within the AMS 6500 protection architecture.

Confirm the rack, sensor circuits, channel configuration, relay behavior, address, software record, and maintenance bypass procedure before returning protection to service.

Availability, condition, price, and shipping time for A6120 are confirmed during quotation.

Emerson A6120 Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • The input-frequency lower cutoff is selectable as 1 Hz or 5 Hz, while the upper cutoff is adjustable from 50 Hz to 2000 Hz
  • Lifting-coil current is configurable from 0...8 mA in 40 µA steps
  • The buffered sensor supply is galvanically separated from system voltages and protected against open and short circuits
  • Alert and danger setpoints are adjustable from 5...100% of full scale with 1% resolution
  • Alarm hysteresis on a decreasing signal is adjustable from 0...20% of full scale
  • Alert and danger functions can be configured as normally open or normally closed and can be blocked when the channel is not OK
  • Self-monitoring covers power, sensor, cable, module electronics, and watchdog status
  • Overload and module-temperature conditions are included in diagnostic monitoring
  • Front buffered and rear analog outputs support commissioning and fault isolation
  • Protect steam, gas, and hydro turbines using case seismic vibration measurements
  • Monitor compressors and other critical rotating machines with compatible velocity sensors
  • Use the two independent channels in an AMS 6500 rack after validating alarm and relay configuration
Description
A6120 is an Emerson AMS 6500 two-channel case seismic vibration monitor for protecting critical rotating machinery with electrodynamic or electromechanical velocity sensors.

Each isolated channel conditions the sensor input, compares measured vibration with configured alarm limits, and provides front buffered and rear analog outputs for monitoring and protection systems.

Before installing or replacing A6120, verify the sensor type and orientation, channel range and filters, alarm voting and delay, relay assignment, rack power, module address, wiring, and configuration backup.
Alternative Names
A6120 Emerson A6120 Emerson AMS 6500 A6120 AMS 6500 A6120 A 6120 AMS6500 A6120
Technical notes
A6120 requires both channels to be matched to the installed sensors, filters, alarm logic, relay mapping, rack address, and AMS 6500 configuration before the protection loop is returned to service.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which vibration sensors can be connected to Emerson A6120?
Emerson documents PR9266, PR9267, and PR9268 electrodynamic sensors and compatibility with field electromechanical sensors. Confirm sensitivity, orientation, cable, and channel setup before connection.
Can Emerson A6120 be replaced while the rack remains powered?
The protection-card reference identifies A6120 as hot-swappable, but the approved site procedure, channel bypass, alarm inhibition, relay state, and redundant protection strategy must be followed.
What should be backed up before replacing Emerson A6120?
Record the module address, both channel ranges, filters, sensor settings, alarm thresholds, delays, voting logic, relay assignments, and configuration-file version.
How does Emerson A6120 report a sensor or wiring problem?
Its self-check monitors power, sensor and cable condition, module electronics, overload, temperature, and watchdog status. Review channel diagnostics before changing the sensor or module.
Can Emerson A6120 provide signals to another control or recording system?
Yes. The module provides front buffered outputs and rear 0/4...20 mA and 0...10 V outputs. Verify scaling, isolation, load, grounding, and receiving-system configuration.
What must be checked when an Emerson A6120 channel gives repeated alarms?
Check the sensor mounting and orientation, cable and shield, configured range and filter, alarm delay, machine operating state, channel diagnostics, analog trend, and relay logic.
What information should accompany a quote for Emerson A6120?
Provide clear front and side label photos, AMS 6500 rack details, sensor types, channel configuration or backup, required condition, quantity, and any chassis or connector requirement.