A6120| Emerson Epro |Case Seismic Vibration Monitor

Description

The A6120 Case Seismic Vibration Monitor is designed for high reliability in critical rotating machinery environments. It is part of the Emerson CSI 6500 series, used alongside other monitors to form a comprehensive API 670 machinery protection system. Suitable for steam turbines, gas turbines, compressors, and hydro-turbomachinery, this monitor accurately measures and protects against case seismic vibrations.

Features

• High reliability for critical machinery
• Compatible with electromechanical and piezoelectric sensors
• Integrates with PlantWeb® and AMS Suite for advanced diagnostics
• Real-time monitoring and alarm functions

Technical Specifications

• Transducer Inputs

  • Number of Inputs: 2, independent channels
  • Type of Inputs: Electro-dynamic (electro-mechanical), differential
  • Emerson Sensor Inputs: Part numbers 9266, 9267, or 9268
  • Isolation: Galvanically separated from power supply
  • Input Resistance: >100 kΩ
  • Input Voltage Range: -5 to +15 VDC
  • Input Frequency Range: Lower cutoff 1 or 5 Hz; Upper cutoff 50 - 2000 Hz adjustable

• Measuring Range

  • Continuously adjustable with configuration software
  • Vrms (metric): 5 - 100 mm/s (±25 to ±500 μm)
  • Vrms (English): 0.197 in/sec to 3.937 in/sec (±0.984 mils to ±19.685 mils)
  • Frequency Range: 10 - 1000 Hz (VDI 2056, DIN 4566, ISO 3945)
  • Selectable Frequency Range: 5 - 50 Hz, 10 - 50 Hz, 50 - 1000 Hz, or 50 - 1600 Hz

• Lifting Coil Current

  • Range: 0 - 8 mA, configurable in steps of 40 μA
  • Accuracy: ±0.5% of full scale range, ±0.5% of configured value
  • Max Permissible Load: 3.4 kΩ at 2 mA
  • Min Dynamic Input Voltage: 311 mV peak to peak
  • Max Dynamic Input Voltage: 9500 mV peak to peak

• Sensor Power Supply

  • Separate buffered sensor supply
  • Galvanically separated from system voltages and supply voltage
  • Open and short circuit proof

• Front Panel Outputs

  • LEDs: Two LEDs indicate channel OK for each channel
  • Red LEDs: Two LEDs indicate alert and danger for each channel
  • Front Panel Buffered Outputs: Two, identical to transducer sensor inputs; ±10 V, >100 kΩ load, frequency range 0.1 Hz - 5 kHz (-3 dB)
  • Mini DIN Configuration Socket: RS-232 for configuration and status monitoring

• Rear Outputs

  • Mode Current Outputs: 0/4-20 mA output for each channel, proportional to main value; Open/short circuit proof; Permissible Load <500 Ω; Accuracy ±1% of full scale; Settling Time 0 - 10 seconds
  • Mode Voltage Outputs: 0 - 10 VDC output for each channel, proportional to main value; Open/short circuit proof
  • Rear Buffered Outputs: Raw buffered output signal, 0 - 12 V peak to peak; Open/short circuit proof; Frequency Range 0.1 Hz - 15 kHz (-3 dB); Permissible Load >10 kΩ

• Alarm Setpoints

  • Alert: Selectable normally open/closed; Delay 0 - 5 seconds/channel; 0 - 36 seconds with A6740 relay card; Adjustable range 5 - 100% of full scale; Resolution 1% of full scale; Hysteresis 0 - 20% of full scale
  • Danger: Similar to Alert with additional features as specified

• Environmental and General

  • Module IP Rating: IP 00, DIN 40050
  • Front Plate IP Rating: IP 21, DIN 40050
  • Climate Class: DIN 40040 class KTF
  • Operating Temperature: 0° - 65°C (32° - 149°F)
  • Storage Temperature: -30° - 85°C (-22° - 185°F)
  • Relative Humidity: 5 - 95%, non-condensing
  • Vibration: IEC 68-2, part 6; 0.15 mm, 10 - 55 Hz; 19.6 mm/s², 55 - 150 Hz
  • Shock: IEC 68-2, part 29; 98 m/s² peak, 16 ms
  • EMC Resistance: EN50081-1 / EN50082-2
  • Power Consumption: Max. 6 W, 250 mA at 24 VDC

• Physical Dimensions

  • PCB/EURO card format according to DIN 41494
  • Width: 30.0 mm (1.181 in) (6 TE)
  • Height: 128.4 mm (5.055 in) (3 HE)
  • Length: 160.0 mm (6.300 in)
  • Net Weight: Approx. 320 g (0.705 lbs)
  • Gross Weight: Approx. 450 g (0.992 lbs) including standard packing
  • Packing Volume: Approx. 2.5 dm³ (0.08 ft³)
  • Space Requirements: 1 slot; 14 modules fit into each 19” rack