EMERSON A6500-UM Universal Measurement Card

Product Description

A6500-UM is a dual-channel plug-in universal measurement card developed by Emerson Bently Nevada, serving as the core signal acquisition module of the AMS 6500 ATG turbomachinery 

protection platform and fully complying with API 670 international heavy-duty rotating equipment safety standardsEmerson.

It adopts compact 3U single-slot structure, saving 50% cabinet space compared with traditional 6U four-channel monitoring cards. The module supports multi-type sensor access including eddy 

current displacement probes, piezoelectric accelerometers, seismic velocity sensors, low-frequency vibration sensors and LVDT displacement transmitters matched with A6500-LC adapter. 

It collects key operating parameters such as shaft relative vibration, absolute casing vibration, axial thrust displacement, rotor eccentricity and casing thermal expansion for critical rotating units.

Embedded PeakVue bearing fault diagnosis algorithm realizes early warning of rolling element fatigue and mechanical hidden trouble. Equipped with isolated 4–20mA analog retransmission output, 

5-channel digital input and 6-channel solid-state relay alarm trip output, data is uploaded to upper DCS and monitoring host via internal RS485 bus and A6500-CC communication card with Modbus 

RTU/TCP protocol conversion. It supports online hot-swap replacement, remote trip bypass and threshold doubling function, with full self-diagnosis for power supply, hardware circuit and sensor 

open/short circuit faults. Widely applied as mandatory maintenance spare parts for steam turbines, gas turbines, large compressors and induced draft fans in thermal power plants and petrochemical 

plants for safety interlock and emergency shutdown protection loops.

Technical Specifications

Model: A6500-UM, Brand: Emerson (Bently Nevada), Origin: United States

Applicable Rack: A6500-SR standard system chassis

Input Channel: 2 independent configurable universal measurement channels

Frequency Response: 0~18750Hz, signal attenuation less than 0.1dB

Analog Output: 2 channels isolated 4–20mA retransmission, max load resistance 500Ω, accuracy ±1%FS

Digital I/O: 5×24VDC digital inputs, 6×SPST solid-state relay alarm outputs

Communication Mode: Internal RS485 bus, upper layer Modbus RTU / Modbus TCP

Hot Swap Function: Full support non-stop online hot plug replacement

Power Supply: -23.25VDC ~ -26VDC dedicated power supply, max working current 35mA

Operating Temperature: -20℃ ~ +55℃ natural cooling, -20℃ ~ +70℃ forced air cooling

Storage Temperature: -40℃ ~ +85℃

Ambient Humidity: 5%–95% non-condensing environment, G3 industrial anti-corrosion coating

Protection Class: IP20 (only installed inside sealed electrical control cabinet)

Mounting Method: 3U Eurocard single slot rack plug-in installation

Net Weight: Approx. 0.38kg

Certifications: API 670, CE, UL, industrial EMC anti-electromagnetic interference certification

Key Features

Universal multi-sensor compatible design, one module completes vibration, displacement and thermal expansion multi-parameter TSI monitoring, greatly reducing spare part types.

Built-in mature PeakVue diagnostic technology, effectively capture early bearing abnormal vibration signals and improve equipment predictive maintenance capability.

Strictly follows API 670 machinery protection standard, reliable hardware latch trip output to guarantee safe shutdown of large rotating equipment under abnormal conditions.

Complete hot-swappable maintenance design, faulty card can be replaced without stopping the whole protection system, minimizing continuous production downtime loss.

Isolated 4–20mA analog signal output, stable anti-interference transmission, seamless docking with mainstream DCS and PLC systems for real-time trend recording.

Comprehensive full-loop self-diagnosis function, front panel LED indicator intuitively displays channel status and fault alarm for rapid on-site troubleshooting.

Ultra-thin 3U single-slot modular layout, flexible for system capacity expansion and cabinet reconstruction, greatly optimizing cabinet space utilization.

Rugged industrial-grade hardware design, strong temperature adaptability and EMC performance, stable 24/7 long-term operation in high-temperature, dusty and strong electromagnetic interference 

turbine room environment.