Differential Input Characteristics
Original instructions
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Internal Wiring Diagram
Input Characteristics
WARNING
UNINTENDED EQUIPMENT OPERATION
Do not exceed any of the rated values in the characteristic table.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
This following table presents the characteristics of the differential input:
Characteristic
Value
Number of inputs per channel
One differential input per channel. Fully insulated cell.
Signal handling
Differential: Sinus or square wave
Built in input impedance
Resistive: 20 KΩ +/- 5% up to +/- 5 V
Resistive greater than 12 kΩ up to +/- 100 V
User input impedance
Two terminals for external resistor
Maximum input voltage from magnetic pickup (MPU) sensor
200 Vdc peak to peak simultaneously on both channels
Maximum input voltage from instrument potential transformer
150 Vac 50/60 Hz only for one channel
100 Vac 50/60 Hz simultaneous on both channels
Minimum input voltage(1) with sinus wave form (MPU sensor or PT)
Depending on parameter MPU input Mode configuration:
  • In Noisy mode: 2.8 V peak to peak plus 0.08 V peak to peak per 10 kHz
  • In Sensitive mode: 0.3 V peak to peak plus 0.01 V peak to peak per 10 kHz
Minimum input voltage with square wave form (Encoder)
Depending on parameter MPU input Mode configuration:
  • In Noisy mode: 4.8 V peak to peak (compliant with RS422 line driver)
  • In Sensitive mode: 1 V peak to peak
Threshold (Immunity)
Depending on parameter MPU input Mode configuration:
  • In Noisy mode: +1.2 V (no pulse is detected while the signal value is less than the threshold)
  • In Sensitive mode(2): Also depending on the input signal:
    • +0.05 V for 0.3 V peak to peak
    • +1 V for 5 V peak to peak or above
Minimum pulse detected with MPU sensor
Time delay > 1.5 μs with U = +2.5 V
(Negative pulse is mandatory between pulses)
Maximum frequency
Square wave in Sensitive mode: 500 kHz
Square wave in Noisy mode: 250 kHz
Sinus wave in Sensitive mode: 250 kHz
Sinus wave in Noisy mode: 250 kHz
Minimum frequency with MPU sensor
Depending on parameter MPU input Mode configuration:
  • In Noisy mode: 1 Hz
  • In Sensitive mode: 12 Hz
(1) The pattern recognition system requires the input voltage to be greater than 4 V peak to peak in Noisy mode and 3 V peak to peak in Sensitive mode. (2) When the minimum input voltage and frequency levels are maintained, the threshold increases in line with the actual signal level.
WARNING
UNEXPECTED VALUES
Ensure that the minimum signal frequency levels are maintained.
Failure to follow these instructions can result in death, serious injury, or equipment damage.