EMERSON A6370D/DP Overview
The EMERSON A6370D/DP is an overspeed protection monitor in the AMS 6300 series SIS (Safety Instrumented System). It is designed to monitor the rotational speed of machinery and trigger alarms or interlocks when the speed exceeds the configured threshold.
Based on the A6370D, the A6370D/DP adds a Profibus-DP communication interface, enabling direct integration with fieldbus networks for high-speed and reliable data transmission.
1. Key Functions and Features
| Function | Description |
|---|---|
| Overspeed Monitoring | Real-time speed measurement with millisecond-level response to prevent mechanical damage caused by overspeed |
| Dual-Channel Design | Each channel has independent hardware/software to improve system availability |
| Sensor Compatibility | Supports eddy current, Hall-effect, and magnetic (VR) sensors |
| Flexible Alarming | Audible/visual alarms, relay outputs, digital signals (RS-485 / Profibus-DP) |
| Easy Configuration | Equipped with a USB-B interface for configuration using Emerson’s setup tools |
| High Reliability | Industrial-grade protection design; IP rating complies with IEC 60068-2-6 and API 670 |
2. Technical Specifications (Key Parameters)
| Item | Parameter |
|---|---|
| Measurement Range | 0–30,000 rpm |
| Accuracy | ±0.5% (speed) |
| Response Time | Typical 12.5 ms (auto mode) or 35 ms (once-per-rev) |
| Power Supply | 24 V DC |
| Communication Interfaces | • Profibus-DP (up to 12 Mbit/s, max. 31 devices) • RS-485 (38400 / 57600 / 115200 baud, max. 32 devices) • USB-B (configuration) |
| Indicators | OK (green), Trip (red), plus 6 yellow status LEDs |
| Dimensions | 84 HP width, 3 RU height (approx. 144 × 144 × 64 mm) |
| Weight | Approx. 0.5 kg (some documentation indicates 1.5 kg) |
| Operating Temperature | -20 °C to +60 °C (or -40 °C to +85 °C) |
| Protection Rating | IP67 (compliant with IEC 60068-2-6) |
3. Typical Applications
- Power plants, oil & gas: Overspeed protection for turbines, compressors, and other high-speed rotating equipment.
- Manufacturing, metallurgy: Speed monitoring of large motors and blowers to prevent mechanical failure caused by overspeed.
- Process control systems: Works jointly with other Emerson safety instruments (e.g., safety valves, emergency shutdown systems) to achieve a complete safety interlock.
Summary
The EMERSON A6370D/DP offers high accuracy, fast response, and multi-protocol communication, providing reliable overspeed protection for industrial rotating machinery. It is a core monitoring unit within the AMS 6300 SIS system and is suitable for industries such as power generation, oil & gas, chemical processing, and manufacturing—where safety and reliability are critical.
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Emerson Main Series
| Monitoring board： | Westinghouse Card： | Delvta： | EPRO sensor probe: |
| EMERSON A6140 | 1C31129G03 1C31132G01 | CE400/ SE400/series | PR6423/PR6424 |
| EMERSON A6210 | 1C31166G02 1C31169G02 | CE3007,CE3008,SE3007, | PR6426/PR9268 |
| EMERSON A6220 | 1C31219G01 1C31223G01 | SE3008,VE3007,VE3008, | PR9376/ Sensor probe |
| EMERSON A6410 | 1C31234G01 1C31238H01 | VE3005,VE3006,VE4006 | Proximitor |
| EMERSON A6312 | 5X00119G01 A6140 | KJ320/KJ322/KJ3223/ | CON021/CON041 |
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