Description

Emerson A6500-UM – Universal Measurement Card

Product Overview

The A6500-UM is a Universal Measurement Card for the Emerson AMS 6500 ATG machinery protection system. It provides two configurable sensor channels that can operate independently or together according to the selected measurement mode. Supported sensor technologies include eddy-current probes, piezoelectric accelerometers and velocity sensors, seismic sensors, low-frequency bearing vibration sensors, Hall-effect sensors, and LVDT devices when paired with the appropriate converter. The card is intended for machinery protection functions such as shaft vibration, eccentricity, position, speed, key signals, and case vibration. Measurement data is transferred through an internal RS-485 bus to the communication card, which supports Modbus RTU and Modbus TCP/IP connectivity. Emerson specifies a compact 3U, 1-slot, hot-swappable design for installation in the A6500 system rack.

Technical Specifications — A6500-UM

*LVDT measurements require an A6500-LC converter. Emerson specifies sensor-dependent electrical ranges, so the exact input characteristics depend on the selected measurement function.

Emerson A6500-UM

Key Features and Benefits — A6500-UM

• Two-channel configurable measurement architecture.
• Supports several common machinery-monitoring sensor types.
• Five digital inputs and six solid-state relay outputs.
• Two isolated 0/4–20 mA measurement outputs.
• Internal RS-485 communication with the system communication card.
• Modbus RTU and Modbus TCP/IP connectivity through the communication architecture.
• Hot-swappable 3U, 1-slot design.
• Built-in monitoring of hardware, power, temperature, sensors, and cables.

Its main strength is measurement flexibility. One card can be configured for different rotating-machinery monitoring duties, which can reduce the number of hardware types required for an installed protection system.

Related Models

A6500-CC: Communication card that transfers measurement data from the internal RS-485 bus to Modbus RTU and Modbus TCP/IP interfaces.

A6500-LC: LVDT converter used when LVDT sensors are required for position measurement.

A6500-SR: System rack that provides the card mounting position as well as supply and signal connections.

A6500-CP: Related communication and protection-system hardware used within the AMS 6500 architecture.

Emerson A6500-UM

Installation and Maintenance — A6500-UM

Before installation, verify the system rack, sensor type, measurement mode, configured limits, communication-card pairing, and existing wiring. Because the same hardware can support different measurement functions, configuration should be recorded before removal.

During maintenance, inspect the card connector, rack slot, sensor cabling, grounding, and associated communication hardware. Check the sensor itself before replacing the electronics if vibration or position readings appear abnormal. After installation, verify signal levels, diagnostics, alarm settings, and communication with the host system.

Personally, I would confirm the configured sensor and measurement function first. A sensor, cable, or configuration fault can produce symptoms that initially look like a failed measurement card.

Product Warranty — A6500-UM

Warranty coverage should be confirmed with the supplier according to the actual supplied condition, such as new, unused surplus, refurbished, or tested-used. For critical machinery-protection spares, procurement records should include the complete model, hardware revision where applicable, serial information, inspection status, and warranty period.

When sourcing the Emerson A6500-UM, verify the AMS 6500 rack, sensor configuration, and associated communication hardware before purchase to ensure compatibility.