Emerson EPRO A6220 Process Input Monitor for CSI 6500 Machinery Health Monitor

Emerson EPRO A6220 Process Input Monitor

The Emerson EPRO A6220, also cataloged as the A6220 Process Input Monitor, is a dual-channel monitoring module designed for integration with the AMS 6500 Machinery Health Monitor (formerly CSI 6500). It provides continuous shaft eccentricity and displacement monitoring, fully compliant with API 670 standards.

Hardware Specifications

Sensor & Signal Interfaces

• Compatible Sensors: PR6422 / PR6423 / PR6424 / PR6425 eddy-current probes with CON preamplifiers.
• Input Impedance: >100 kΩ.
• Input Voltage Range: –1 to +23 VDC.
• Frequency Response: 0.017 Hz to 70 Hz (102 rpm to 4200 rpm).
• Measurement Range: 0–400 mV to 0–8000 mV peak, software adjustable.
• Sensor Power Supply: Buffered –26.7 VDC, 20 mA nominal.

Outputs & Alarms

• Analog Outputs: 2 × 0/4–20 mA current loops (±1% accuracy).
• Voltage Outputs: 0–10 VDC proportional outputs.
• Buffered Outputs: Raw sensor signals available front/rear for analyzer connection.
• Alarms: OK, Alert, Danger indicators per channel.
• Alarm Delay: Configurable 0–5 s; expandable to 36 s with A6740 relay card.
• Functions: Limit Multiply and Trip Bypass supported.

Self-Diagnostics & Reliability

• Continuous monitoring of board hardware, sensor integrity, cabling, and internal temperature.
• Hot-swappable design for live replacement without system shutdown.
• Compact 3U format saves rack space compared to older 6U modules.

Field Installation Guidelines

• Insert into AMS 6500 rack slot with full connector engagement.
• Route sensor cabling with shield continuity to minimize EMI.
• Verify buffered sensor supply voltage (–26.7 VDC) before energizing.
• Configure alarm delays and trip bypass functions via AMS software.
• Confirm LED indicators for channel status during commissioning.