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EMERSON AMS 6500
A6140
Shaft Absolute
Vibration Monitor Dual-channel machinery protection module for measuring shaft absolute vibration by combining relative displacement and case vibration measurements.
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ENGINEERING PROFILE
The A6140 combines a relative shaft displacement measurement with a case-mounted vibration measurement. The two signals are phase compensated and mathematically combined to determine shaft absolute displacement relative to free space.
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APPLICATION FOCUS
Critical rotating machinery
Suitable for machinery protection applications involving steam turbines, gas turbines, compressors and hydro turbomachinery.
SENSOR COMPATIBILITY
6422
6423 6424 6425 6125 API 670 compliant architecture with hot-swappable module design.
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A6140 SIGNAL PATH
Channel 1 accepts an eddy-current displacement sensor. Channel 2 accepts a seismic or piezoelectric case-vibration sensor. The A6140 can operate the channels independently or in a combined monitoring configuration.
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OUTPUT & DIAGNOSTIC FUNCTIONS
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| MODEL | PRIMARY ROLE | INPUT CONCEPT | DISTINGUISHING POINT |
| A6140 | Shaft absolute vibration | Displacement + case vibration | Combines shaft-relative and case-motion measurements |
| A6110 | Shaft relative vibration | Relative displacement | Focused on shaft movement relative to the bearing case |
| A6120 | Case seismic vibration | Electrodynamic seismic sensors | Measures bearing-case vibration |
| A6125 | Case piezoelectric vibration | Accelerometer / velometer | Designed around piezoelectric case-vibration sensors |
| A6210 | Thrust / differential expansion / rod position | Position measurements | Different measurement purpose from vibration monitoring |
| A6220 | Shaft eccentricity | Shaft position / displacement | Focused on eccentricity rather than absolute vibration |
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READY FOR INDUSTRIAL INQUIRY
Need A6140?
Tell us the required quantity, destination and required delivery date for your inquiry.
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Can A6140 replace a shaft-relative vibration monitor when the application requires shaft absolute vibration?
A6140 is specifically designed for shaft absolute vibration measurement. It combines a relative displacement sensor with a case-mounted vibration sensor and mathematically derives shaft absolute displacement relative to free space. It should therefore be selected according to the required measurement architecture rather than treated as a generic replacement for every vibration-monitoring card.
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Which sensors should be checked before ordering A6140?
The A6140 documentation specifies 6422, 6423, 6424 and 6425 displacement sensors for Channel 1 and 6125 for Channel 2. Existing installations should therefore be checked for sensor type, channel assignment and signal architecture before a replacement is ordered.
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What should be checked when integrating A6140 analog outputs into a control or protection system?
A6140 provides 0/4–20 mA proportional outputs and 0–10 VDC outputs for the monitored values. For current outputs, the specified permissible load is below 500 Ω and accuracy is ±1% of full scale. The receiving system and configured measurement mode should be checked before wiring.
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Why is the A6140 architecture useful for sleeve-bearing machinery?
Emerson describes shaft absolute vibration as an important measurement for sleeve-bearing machines, particularly where bearing-case movement can be significant. A6140 combines shaft-relative and case-motion measurements to obtain the shaft absolute result relative to free space.
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What configuration details should be confirmed when replacing an A6140 in an AMS 6500 system?
Confirm the AMS 6500 rack arrangement, sensor combination, channel mode, measurement range, sensitivity, filter settings, Alert and Danger setpoints, output mode and alarm-delay requirements. A6140 supports hot configuration and provides self-checking for hardware, power input, temperature, sensors and cables, but the replacement configuration should match the actual machinery protection design.
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Embrace the Future of Innovation Unlock the Power of Seamless Automation By integrating advanced automation solutions, real-time analytics, sophisticated control systems, and lifecycle services, improves operational performance while reducing risks, costs, and downtime. WeChat: hu18030235311 | WhatsApp: +86-18030235311 Mobile: +86-18030235311 | E-mail: sales3@amikon.cn
Embrace the Future of Innovation Unlock the Power of Seamless Automation By integrating advanced automation solutions, real-time analytics, sophisticated control systems, and lifecycle services, improves operational performance while reducing risks, costs, and downtime. WeChat: hu18030235311 | WhatsApp: +86-18030235311 Mobile: +86-18030235311 | E-mail: sales3@amikon.cn
Embrace the Future of Innovation Unlock the Power of Seamless Automation By integrating advanced automation solutions, real-time analytics, sophisticated control systems, and lifecycle services, improves operational performance while reducing risks, costs, and downtime. WeChat: hu18030235311 | WhatsApp: +86-18030235311 Mobile: +86-18030235311 | E-mail: sales3@amikon.cn
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