Emerson EPRO MMS 6220 Dual Channel Eccentricity Monitor

Technical Data:

Sensor Inputs:

• Two independent signal inputs for eddy current measuring chains.
• Differential inputs, galvanically isolated from the power supply.
• Input Impedance: ≥ 100 kOhm
• Input Voltage Range: -1 to -23 V DC
• Signal Frequency Range: 0.017 to 70 Hz (1.02 to 4200 rpm)
• Signal Voltage Range:
  • Minimum Range: 0 to 400 mVpeak
  • Maximum Range: 0 to 8000 mVpeak; any value freely selectable within this range
• Sensor Supply:
  • Each sensor has its own output buffer, galvanically isolated from all system voltages and the power supply of the monitor.
  • Open circuit and short-circuit proof.
  • Parallel connection with other monitors possible without mutual influences.
  • Nominal Voltage: -26.7 V DC
  • Maximum Supply Current: typ. 20 mA; max. 35 mA

Control Inputs:

• Common logic inputs for both channels.
• For choosing operating mode and limit values for "warning" and "danger":
  • Open circuit or closed circuit mode
  • Locking of monitor
• Measuring range multiplier to modify the alarm limits during run-up or run-down.
  • Adjustable Range: 1.000 to 4.999
  • 24 V Logic
  • Input Resistance: ≥ 30 kOhm

Key Pulse Input:

• One pulse per revolution; input for system control
• 24 V logic
• Input Resistance: ≥ 30 kOhm
• Pulse Duration: Min. 10 µs (edge triggering)

Voltage Inputs:

• Two, one for each channel.
• Range: 0 to 10 V
• Input Impedance: ≥ 100 kOhm
• Resolution: 10 bit