A6370 | Emerson EPRO | AMS 6500 Overspeed Protection Monitor

Overview

The Emerson EPRO A6370 is a critical component of the AMS 6300 SIS Overspeed Protection System. It is designed for mounting in a 19” rack (84HP width and 3RU height) and operates in conjunction with the A6371 system backplane. This system integrates three A6370 protection monitors and one A6371 backplane, providing robust overspeed protection in various industrial applications.

Features

• Sensor Compatibility:
  • Supports Eddy-Current, Hall-Element, and Magnetic (VR) sensors.
• Digital and Analog Inputs/Outputs:
  • Multiple digital and analog channels for flexible integration.
• Configuration and Communication:
  • USB and RS-485 interfaces for easy configuration and communication with other devices.

Specifications

Sensor Voltage Supply

• Nominal Supply Voltage: -24.5 V ±1.5 V DC (short-circuit proof, galvanically separated)
• Max Current: 35 mA

Signal Input

Eddy Current & Hall Element Sensors

• Input Signal Voltage Range: 0 V to 26 V (+/-) (protected against reverse polarity)
• Limit Range: ± 48 V
• Frequency Range: 0 to 20 kHz
• Input Resistance: Typical 100 kΩ

Magnetic (VR) Sensors

• Input Signal Voltage Range: Min. 1 Vpp, max. 30 V RMS
• Frequency Range: 0 to 20 kHz
• Input Resistance: Typical 18 kΩ

Digital Input (Backplane)

• Number of Inputs: 4 (galvanically separated with common ground)
  • Includes: Test Value 1, Test Value 2, Enable Test Values, Reset Latch
• Logic Low Level: 0 V to 5 V
• Logic High Level: 13 V to 31 V (open)
• Input Resistance: Typical 6.8 kΩ

Current Output (Backplane)

• Number of Outputs: 2 (electrically isolated with common ground)
• Range: 0/4 to 20 mA or 20 to 4/0 mA
• Accuracy: ±1% of full scale
• Maximum Load: <500 Ω
• Max Output Current: 20 mA

Digital Output (Backplane)

• Number of Outputs: 7 (short-circuit proof)
  • Includes: Out 1 to Out 6, Channel Ok (COK)
• Logic Low Level: < 100 mV
• Logic High Level: -2 V
• System Supply Voltage Max Current: 25 mA

Pulse Output

Backplane

• Number of Outputs: 3 (Open-Collector-Emitter, current limited, galvanically separated)
• Max Voltage: 31.2 V
• Max Current: 16 mA @ 24 V
• Frequency Range: 0 to 20 kHz

Front Panel

• Number of Outputs: 1 (short-circuit proof)
• Voltage: 0 to 5 V (TTL-Signal)
• Frequency Range: 0 to 20 kHz
• Output Impedance: Typical 10 kΩ

Sensitivity Output (Front Panel)

• Number of Outputs: 1 (short-circuit proof)
• Voltage: 0 to 3.9 V (Factor 0.15 ± 3%)
• Frequency Range: 0 to 20 kHz
• Output Impedance: Typical 10 kΩ

Communication

• USB Configuration Interface: USB Type B
• RS-485: Max. 32 devices, Baud Rate: 38400, 57600, 115200 Baud
• Profibus DP (A6370D/DP only): Max. 31 devices, Data transmission rate: up to 12 Mbit/s

Reaction Time

• Speed: < Measuring Time + 8 ms
• Typical Reaction Time at 3000 min⁻¹:
  • Mode “1x per revolution”: 35 ms
  • Mode “Automatically”: 12.5 ms
• Rotational Direction: < 3 * Period time of input signal + 8 ms