Product Core Brief
- Model: A6110
- Brand: EMERSON (CSI / EPRO)
- Series: CSI 6500 / AMS 6500 Machinery Health Monitor
- Core Function: Monitors relative shaft vibration using eddy current proximity probes for machinery protection and diagnostics.
- Product Type: Dual Channel Relative Shaft Vibration Monitor
- Key Specs: 2 Channels | 3U Form Factor | 1-Slot Plug-in | API 670 Compliant
- Condition: New Original (New Surplus)

EMERSON A6110
Product Introduction
EMERSON is a dual-channel relative shaft vibration monitor designed for the CSI 6500 Machinery Health Monitor system. It measures the relative vibration of rotating shafts with respect to the bearing housing using non-contact eddy current displacement sensors.
This single-slot, 3U plug-in module is engineered to provide both API 670-compliant machinery protection and advanced predictive maintenance diagnostics. It supports multiple measurement modes including peak-to-peak, zero-to-peak, and Smax, and integrates seamlessly with PlantWeb® and AMS Suite for real-time condition monitoring in DeltaV™ and Ovation® environments.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Dual Channel Relative Shaft Vibration Monitor |
| Form Factor | 3U High, 1-Slot Plug-in |
| Sensor Input | Eddy Current Proximity Probe (Differential) |
| Compatible Sensors | PR6422, PR6423, PR6424, PR6425 |
| Input Voltage Range | 0 to -22 VDC |
| Frequency Range | 1-5 Hz (Lower), 50-2000 Hz (Upper, Adjustable) |
| Measurement Modes | Peak-to-Peak, Zero-to-Peak, Smax, True S |
| Output Signals | Buffered, Proportional, 4-20 mA, 0-10 V |
| Compliance | API 670, DIN 45670A, VDI 2059, Hot-Swappable |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We check source traceability and verify serial numbers against anti-counterfeit databases. Visual inspection confirms no physical damage or connector corrosion.
- Live Functional Test: Power-on self-checks validate basic operation. We run continuous load tests exceeding 24 hours with temperature logging to ensure stability.
- Electrical Parameter Test: Insulation resistance is verified using a 500 V Megger, requiring >10 MΩ. Ground continuity is also strictly checked.
- Firmware Verification: We read and record internal firmware versions. DIP switch and jumper settings are photographed for future reference.
- Final QC & Packaging: The unit is sealed in an anti-static bag. A QC Passed label with the inspection date is applied before shipping.

EMERSON A6110
Replacement Pitfall Guide
❗ Sensor System Compatibility: The is specifically designed for eddy current proximity probes (e.g., PR642x series). Do not attempt to connect seismic accelerometers or velocity sensors to this module.
❗ Measurement Mode Selection: Verify that the configured measurement mode (e.g., Peak-to-Peak vs. Smax) matches your machinery protection philosophy and API 670 requirements. Incorrect mode selection can lead to false trips or missed fault detection.
❗ 3U Slot Allocation: This is a 3U high module occupying one slot. Ensure your CSI 6500 chassis has adequate space and that adjacent modules do not interfere with airflow or mechanical clearance.
❗ Alarm Delay Configuration: The module supports programmable alarm delays (0-5 seconds standard, up to 36 seconds with A6740 relay card). Verify delay settings match your machine’s transient behavior during startup/shutdown.
❗ ESD Damage: Use an anti-static mat during installation. Dry environments significantly increase electrostatic discharge risks to sensitive electronics.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- → A6120 (9199-00002) : Companion — Relative Shaft vs. Seismic Bearing Housing Vibration
- → A6140 : Companion — Relative Shaft Vibration vs. Axial Position Monitoring
- → CSI 6500 Chassis : Companion — Requires 19″ or Compact CSI 6500 Frame
- → A6740 Relay Card : Companion — Extended Alarm Delay (0-36s)
- Scan Cycle: < 1 ms (Protection), Continuous (Diagnostics)
- Comms Throughput: Modbus TCP / Serial via CSI 6500 Backplane
Need matching PR6423 proximity probes or verifying your CSI 6500 chassis slot availability? I can confirm the exact sensor scaling and alarm configuration for your turbine or compressor application.






