EPRO A6312/08 Speed Keyphasor Monitoring Module
$178.00
$390.00
Description
Product Description
The Emerson EPRO A6312/08 is a dual-channel rotational speed and phase reference module designed for integration into MMS 6000 and AMS 6500 machinery protection systems. It is intended for precise acquisition and evaluation of shaft speed signals and keyphasor events in high-performance rotating equipment.
This module processes input signals from proximity probes or Hall-effect sensors, delivering accurate measurement of rotational speed, phase angle, zero-speed condition, and direction of rotation. With its microprocessor-based architecture, the A6312/08 provides stable real-time monitoring along with diagnostic outputs required for advanced vibration and order analysis.
Technical Specifications
| Parameter | Specification |
|---|---|
| Channel Configuration | 2 independent input channels |
| Sensor Compatibility | Eddy current probes (PR642x series), Hall-effect sensors (e.g., PR9376) |
| Input Voltage Range | 0 to ±27.3 VDC |
| Input Impedance | >100 kΩ |
| Input Isolation | Galvanically isolated from supply and system |
| Frequency Range | 0 to 20,000 Hz |
| Maximum Speed | Up to 65,535 RPM (depending on pulse configuration) |
| Analog Outputs | 0/4–20 mA or 0–10 V selectable |
| Buffered Outputs | Front SMB connectors and rear terminals |
| Pulse Output | TTL signal up to 20 kHz per channel |
| Functional Capabilities | Speed monitoring, phase reference, zero-speed detection, rotation direction |
| Diagnostics | Sensor condition, cable monitoring, internal hardware checks |
| Communication | RS-485 interface for system integration |
| Operating Temperature | 0°C to +55°C |
| Mounting Format | 3U, 8HP plug-in module for 19-inch rack |
| Dimensions | 128 × 40 × 190 mm |
| Weight | 0.28 kg |
| Compliance | Designed in accordance with API 670 requirements |
Key Functional Characteristics
The A6312/08 supports simultaneous monitoring of two independent signals, enabling either dual-shaft measurement or redundant sensor configurations. Its high-frequency capability makes it suitable for fast-rotating machinery, while precise keyphasor detection supports synchronous vibration analysis and order tracking. Integrated buffering allows direct connection to diagnostic equipment without signal degradation.
The module also features built-in self-monitoring functions, reducing the risk of false alarms and improving overall system reliability. Its rack-based design allows replacement or maintenance without interrupting system operation.
Application Scenarios
Typical applications include steam and gas turbines, centrifugal compressors, hydro turbines, gear-driven systems, and high-speed industrial fans. It is used where accurate speed measurement and phase reference are essential for protection systems and condition monitoring.
FAQ
Q: Can this module handle redundant sensor inputs?
Yes, the two channels can be configured independently or used for redundancy.
Q: What types of sensors are supported?
Both eddy current proximity probes and Hall-effect sensors are supported.
Q: Is it suitable for high-speed machinery?
The module supports frequencies up to 20 kHz, making it suitable for very high rotational speeds.
Features
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