Emerson A6220

Description

1. Product Description

• API 670 Compliance: Ensures adherence to industry standards for machinery protection.
• Hot-Swappable Design: Reduces downtime during module replacement or upgrades.
• Wide Temperature Range: Operates from -40°C to +85°C, suitable for extreme environments.
• User-Configurable Alarms: Adjustable setpoints and hysteresis for alert/danger thresholds.

2. Product Parameters

Parameter	Specification
Input Type	Eddy current sensors (PR 6422/6423), LVDTs (e.g., TD-2 series)
Measurement Range	Shaft eccentricity: ±25 mm; thermal expansion: 0–50 mm
Excitation	1500 Hz, 10–20 VAC
Outputs	2 × 4–20 mA analog; RS-485/Modbus RTU
Power Supply	24 VDC ±10%, 5.5 W power consumption
Dimensions	30 mm (W) × 128.4 mm (H) × 160 mm (D) (1.18″ × 5.05″ × 6.3″)
Weight	0.3 kg (0.66 lb)
Certifications	CE, RoHS, IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT)

EMERSON A6220

3. Advantages and Features

1. Precision Monitoring:
   • 16-bit ADC resolution and 0.15% linearity error ensure accurate measurements of shaft misalignment or bowing.
   • Example: A petrochemical plant reduced unplanned downtime by 40% after detecting a cracked gear tooth 72 hours before failure using A6220-monitored eccentricity data.
2. Redundancy and Reliability:
   • Dual-channel architecture eliminates single points of failure in mission-critical applications.
   • Galvanic isolation protects against voltage spikes and electromagnetic interference (EMI).
3. Ease of Integration:
   • Native Modbus support allows direct connection to PLCs or SCADA systems without additional gateways.
   • Front-panel LEDs provide real-time status updates on power, alarms, and sensor health.
4. Cost Efficiency:
   • 3U size reduces cabinet space by 50% compared to traditional 6U modules.
   • Self-diagnostic algorithms minimize maintenance costs by identifying faulty components early.

4. Application Areas and Use Cases

• Power Generation: Monitors steam turbines and generators in thermal and nuclear plants.
• Oil & Gas: Protects compressors, pumps, and offshore platforms from vibration-induced failures.
• Manufacturing: Enhances CNC machine tool reliability through predictive maintenance.

5. Competitor Comparison

Feature	A6220	Typical Competitors
Channels	2 (expandable)	1–4
Temperature Range	-40°C to +85°C	0°C to 50°C
Redundancy	Built-in dual channels	Optional add-ons
Integration	Native Modbus/PROFIBUS	Requires additional modules
Size	3U (1-slot)	6U (2-slot)

EMERSON A6220

6. Selection Recommendations

1. Monitoring Needs:
   • Choose A6220 for applications requiring dual-channel eccentricity and thermal expansion monitoring (e.g., large turbines).
2. Communication:
   • Pair with CPUR2/IOCR2 modules for seamless integration with Emerson’s DeltaV™ or Ovation™ systems.
3. Environmental Conditions:
   • Select the extended temperature version (-40°C to +85°C) for extreme climates.
4. Budget:
   • Opt for hot-swappable modules to reduce downtime and maintenance costs.

7. Precautions

1. Installation:
   • Use shielded cables and proper grounding to minimize EMI interference.
   • Follow API 670 guidelines for sensor placement and alignment.
2. Operation:
   • Do not exceed input voltage limits (24 VDC ±10%).
   • Calibrate sensors annually using Emerson’s official tools.
3. Maintenance:
   • Clean cooling vents quarterly to prevent overheating.
   • Update firmware via Emerson’s online portal for security patches and new features.