Emerson A6500- UM Dual Channel Universal Measurement Card

Description

The Emerson A6500-UM is a dual channel universal measurement card that is an important component of the AMS 6500 ATG mechanical protection system. This 1-slot, 3U module design emphasizes high reliability and is suitable for the most critical rotating machinery in industrial environments.

A6500- UM

It is the core data acquisition and preprocessing unit in the AMS 6500 ATG ecosystem. This measurement card is equipped with 2 sensor input channels, which can operate independently or be used in combination according to the selected measurement mode. This flexibility enables it to collaborate with various common sensors in the industry. These sensors include eddy current sensors, which are very suitable for measuring shaft displacement and vibration; Piezoelectric sensors (accelerometers or speedometers) are an ideal choice for detecting rapid changes in vibration levels; Seismic (electric) sensors used for measuring large-scale vibrations; Low frequency bearing vibration sensors are crucial for monitoring the health status of bearings; Hall effect sensor, capable of detecting magnetic field changes related to shaft rotation; LVDT sensor (when used in conjunction with A6500- LC) can accurately measure linear displacement.

In the architecture of the integrated mechanical protection system, the Emerson A6500-UM is located between sensors that detect mechanical physical parameters and higher-level control and analysis systems. It collects raw data from sensors, processes it, and transmits measurement signals to the A6500 CC communication card through an internal RS 485 bus. The communication card then converts these signals into Modbus RTU and Modbus TCP/IP protocols, making the data suitable for further transmission to the host computer or analysis system. In addition, the Emerson A6500-UM includes 5 digital inputs and 6 digital outputs, which can be configured for various control and alarm functions, enhancing its versatility. For engineers and integrators, its compact design, extensive sensor compatibility, and seamless integration capability in the AMS 6500 ATG system make it an ideal choice for enhancing the safety and reliability of industrial machinery monitoring settings.

A6500- UM

Main features and advantages:
Functionally speaking, the EmersonA6500-UM has excellent measurement accuracy. In terms of shaft vibration measurement, it can accurately determine absolute and relative vibrations, providing highly reliable data about the mechanical condition for operators. For shaft eccentricity monitoring, this measuring card can detect small deviations from ideal rotation, which is crucial for preventing excessive wear and potential damage to the shaft and its bearings.

The response time of Emerson A6500-UM is also excellent. It can quickly process the data received from sensors and transmit it to the A6500 CC communication card. This fast data transmission ensures that operators can obtain real-time information on the health status of the machinery, enabling them to make timely decisions. When any abnormal situation occurs, the measurement card can immediately trigger an alarm through its digital output, ensuring timely corrective measures are taken.

In terms of hardware design, the Emerson A6500-UM is a sturdy and durable compact module. Its 3U size and one slot plug-in design make it easy to install into standard control cabinets, reducing space requirements by half compared to traditional four channel 6U cards. This module also supports hot swapping, which is a significant advantage. When a malfunction occurs, it can be replaced without shutting down the entire system, minimizing downtime to the greatest extent possible. This feature complies with the API 670 standard, demonstrating its reliability in industrial environments.

Compatibility is a major advantage of this measurement card. As mentioned earlier, it can interface with multiple sensors and also has multiple output options. The 0/4-20 mA analog output can be used to transmit signals to external monitoring systems or controllers. These outputs have a common ground and are electrically isolated from the system power supply to prevent interference and ensure accurate signal transmission. The measurement card also has a self checking function, which can continuously monitor its hardware, power input, hardware temperature, sensors, and cables. This self diagnostic ability helps to detect any potential problems early, achieve proactive maintenance, and reduce the risk of unexpected failures.

A6500- UM

Technical specifications:
Model A6500-UM
Brand Emerson
Type Universal Measurement Card
Power supply -23.25 V/-26.0 V DC (optional, short circuit protection)
Working temperature -20 ° C to+70 ° C
Installation method: Install in slot 1 of the A6500 SR system rack
Size 16 cm * 16 cm * 12 cm
Weight 0.8 kg
Interface RS 485 (for internal communication with A6500- CC), 0/4-20 mA analog output, 5 digital inputs, 6 digital outputs
Certified to comply with API 670 standard

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A6500- UM

Application areas:
In power plants, whether they are large thermal power plants or advanced wind farms, Emerson A6500-UM is at the forefront of mechanical protection. Accurate monitoring of shaft vibration is crucial for steam turbines in thermal power plants. This measurement card can interface with various sensors such as eddy current sensors and piezoelectric sensors, and can accurately measure the absolute and relative vibration of the shaft. These data are crucial for detecting early signs of imbalance or misalignment in the turbine shaft. If such problems are not resolved, they may lead to increased wear and tear, reduced power generation, and in extreme cases, catastrophic failures, resulting in severe downtime and high maintenance costs. In wind turbines, the Emerson A6500-UM helps monitor the speed and position of the blades. By using Hall effect sensors, etc., the blades are ensured to operate within safe parameter ranges, adjusted according to changes in wind speed and direction to optimize energy production while protecting the integrity of the turbine.

The oil and gas industry is also highly dependent on the Emerson A6500-UM. In refineries, compressors are the core equipment in the production process. This measurement card monitors various parameters related to the operation of the compressor, such as thrust and connecting rod position, differential expansion and casing expansion, and valve position. For example, in reciprocating compressors, Emerson A6500-UM can use LVDT sensors (in conjunction with A6500-LC) to detect any abnormal axial movement of the piston rod. These pieces of information are used to prevent issues such as piston and cylinder wear, which may lead to gas leaks and low operational efficiency. On offshore oil platforms, the environment is harsh and equipment reliability is crucial. This measurement card ensures smooth operation of pumps, turbines, and other rotating machinery. By continuously measuring parameters such as shaft eccentricity and housing piezoelectric vibration, it helps predict potential faults, achieve timely maintenance, and avoid expensive unplanned shutdowns.

Related products:
A6500- CC Communication Card – This card is crucial for Emerson A6500- UM as it receives measurement signals from A6500- UM via an internal RS 485 bus. A6500- CC then converts these signals into Modbus RTU and Modbus TCP/IP protocols to enable communication with the host system or analysis tool. It also provides a USB socket on the front panel that can be directly connected to a PC or laptop for configuring the Emerson A6500-UM and visualizing measurement results.
A6500- SR System Rack – Emerson A6500- UM operates within the A6500- SR System Rack. This rack provides necessary power and manages signal connections for the entire monitoring system. It serves as the physical and electrical backbone of the AMS 6500 ATG system, ensuring stable operation of the Emerson A6500-UM and other related modules.

Installation and maintenance:
Before installing the Emerson A6500-UM, please ensure that the A6500-SR system rack has an available slot 1 for installing the module. The rack should be properly ventilated to prevent the Emerson A6500-UM from overheating during operation. When connecting the sensor to the measurement card, please carefully follow the wiring diagram provided by Emerson. Ensure that the sensor is installed in the correct position and the cable is securely fixed to prevent any signal interference. Check the power connection to ensure that the correct voltage (-23.25 V/-26.0 V DC) is provided and there is no short circuit.

For maintenance, conduct a visual inspection once a month. Check for any signs of physical damage to the module, such as cracked casing or loose connectors. Check the status indicator lights on the module (if any) to ensure they are functioning properly. Every quarter, conduct a comprehensive inspection of the measurement card using Emerson’s specialized diagnostic tools. These tools help detect any potential issues with hardware, sensors, communication interfaces, or power supply. Keep the firmware of EmersonA6500-UM updated to the latest version. Emerson regularly releases firmware updates, which may include bug fixes, performance improvements, and feature enhancements. Updating the firmware at least once a year helps maintain optimal performance of the measurement card and ensures compatibility with other components in the AMS 6500 ATG system.

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