Emerson EPRO MMS6350D Digital Overspeed Protection System

Technical Data:

Signal Inputs:

• Type: Differential Input, non-reactive, open-circuit, and short-circuit proof
• Input Voltage Range: 0 to 27.3 V DC
• Limit Range: 0 to 30 V
• Input Resistance: 100 kOhm

Sensor Signal Outputs:

• Connectors: SMB front sockets, buffered, open-circuit and short-circuit proof, non-reactive
• Signal Output Range: 0 to 4.1 V; output = 0.15 x sensor signal
• Accuracy: ±1% of full-scale deviation (f.s.d.)
• Frequency Range: 0 to 16 kHz (-3dB) ±20%
• Permissible Load: 1 MOhm
• Internal Resistance: 10 kOhm

Dynamic Outputs:

• TTL Output: The prepared input pulses are output as TTL pulses
• TTL Pulse: Open circuit and short-circuit proof, non-reactive
• Nominal Range: 0 to 5 V
• Frequency Range: 0 Hz to 20 kHz
• Permissible Load: ≥1 kOhm
• Internal Resistance: 5.1 kOhm

Pulse Outputs:

• Description: The prepared input pulses are output via potential-free optocouplers
• Max Voltage: +24 V at UC, +48 V at the collector
• Max Current (C-E Conducting): 100 mA

Signal Conditioning for Characteristic Values:

• Description: Input signals are standardized by the processor. The characteristic value is proportional to speed, i.e., input pulse frequency divided by the number of teeth on the trigger wheel.
• Max Measuring Range: Limited by the max. signal frequency of 20 kHz at the input
• Max Speed: 65,535 rpm (limited to max. 18 teeth at the trigger wheel by the max. input frequency of 20 kHz)
• Max Number of Teeth at Trigger Wheel: 255 (max. 4700 rpm)

Current Outputs of Characteristic Values:

• Description: Calculation and evaluation depend on functions defined during configuration
• Current Output 1: 0/4 to 20 mA, galvanically isolated, accuracy ±0.1% of f.s.d., 16 bits
• Current Output 2: 0/4 to 20 mA, galvanically not isolated, with feedback for comparison of analog results, accuracy ±0.1% of f.s.d., 16 bits
• Speed Zoom: One speed zoom per current output, accuracy ±0.1% of f.s.d., 16 bits

Channel Supervision and Visualization:

• Description: Each channel checks the signal of the accompanying speed sensor continuously and compares pulses and current outputs of the other two channels with its own channel to ensure maximum safety. Faults are indicated with two green LEDs on the monitor front.
• Signaling: Via opto-decoupled collector/emitter
  • Status = Fault: Umax = 48 V DC
  • Status = OK: Imax = 100 mA

Binary Inputs:

• Description: Galvanically isolated but with common GND
• Signal Level:
  • Low: 0 to +3 V
  • High: +13 to +48 V
• External Blocking: To disable the function, alarm outputs for service and maintenance units, etc.
• Reset Latch: To reset the latch function of function and alarm outputs
• Test Input: For testing the monitoring functions with an internally generated test value

Binary Outputs:

• Description: Six function outputs with separate function or limit setting. Functions and switching characteristics defined during configuration.
• Limit Setting: By parameter setting, depending on assigned function
• Visualization of Condition: Red LED for each function/alarm output
• Limit Data for Binary Outputs:
  • Outputs 1-3:
    • C-E Open: Max. 48 V
    • C-E Conducting: Max. 50 mA
  • Outputs 4-6:
    • C-E Open: Max. 48 V
    • C-E Conducting: Max. 100 mA