Emerson EPRO A3311/022-000 Speed & Key Phase Transmitter

The Emerson EPRO A3311/022-000 speed and key phase transmitter delivers accurate rotational monitoring for critical machinery protection. This Emerson device ensures reliable speed measurement and phase reference detection in demanding industrial applications.

Product Overview

• Brand & Model: Emerson EPRO A3311/022-000
• Product Line: EPRO Machinery Monitoring
• Device Type: Speed and Key Phase Transmitter
• Primary Function: RPM and Phase Angle Measurement
• Manufacturer: Emerson Process Management

Performance Specifications

• Speed Range: 0-30,000 RPM measurable range
• Key Phase Input: Proximity sensor or magnetic pickup
• Accuracy: ±1 RPM or 0.1% of reading
• Response Time: < 10 ms for speed changes
• Update Rate: 1000 samples per second
• Resolution: 0.1 RPM speed resolution

Input Sensor Compatibility

• Proximity Probes: 8mm eddy current sensors
• Magnetic Pickups: 50-5000 Hz frequency range
• Input Signal: 0.5-30 V peak-to-peak
• Sensor Power: -24 V DC for proximity probes
• Connections: Terminal block or BNC options

Mechanical Design

• Housing Material: Aluminum alloy enclosure
• Mounting: DIN rail 35mm standard
• Dimensions: 100mm x 80mm x 40mm (LxWxH)
• Weight: Approximately 0.4 kg
• Connections: Removable screw terminals
• Indicators: LED status and alarm indicators

Certifications & Standards

• Safety Standards: UL, CSA, CE certified
• EMC Compliance: EN 61326-1 industrial
• Hazardous Areas: ATEX/IECEx options available
• Quality System: ISO 9001 manufacturing
• Industry Standards: API 670 compatible

Application Areas

• Gas and steam turbine speed monitoring
• Compressor overspeed protection systems
• Generator rotational speed measurement
• Industrial motor speed control
• Pump and fan speed monitoring
• Critical machinery protection systems

Frequently Asked Questions

• What is the main purpose? Speed measurement and key phase detection for machinery
• What brand is this transmitter? Emerson EPRO series product
• What speed range can it measure? 0 to 30,000 RPM full range
• What sensors are compatible? Proximity probes and magnetic pickups
• What output signals are provided? 4-20 mA analog and digital pulse
• What environmental protection? IP66/IP67 rated enclosure
• What industries use this device? Power generation, oil & gas, heavy industry
• Is special software needed? Optional for advanced configuration