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Signal Isolator


MSI7P is a signal isolator utilized to prevent damage to valuable PLCs, DCS, etc. from fluctuations in the input signal from field devices. It is also a signal multiplier that can retransmit up to 5 output signals from 1 input signal. It receives input from Zirconia oxygen probes and 3 types of thermocouples (K, R, S). Versions for universal input and only oxygen sensors are also available. Standard outputs include current and voltage, if our customer desires non-standard outputs, each must be specified. Outputs may be assigned to carbon potential, temperature (?°C) or oxygen probe (mV). MSI7P provides signal isolation of 1 KV AC RMS/1 minute and 250 V AC RMS/continuous between its own power supply, the input and output. The operator calibrates ZERO and SPAN for the isolator via membrane keys on the front of the unit. MSI7P features a single programmable LCD display, which indicates carbon potential, type of thermocouple, process value, output signal and output signal percentage.

  • Input : Oxygen probe or Thermocouple (K, R, S)
  • Direct display of carbon potential
  • Up to 5 x 4 - 20 mA (or voltage) outputs
  • Input/supply/outputs mutually isolated
  • 85–265 V AC/DC or 20-30 V DC power supply
  • Calibration through keys - no trimpots
  • 2 x 16 character LCD display
  • RS485/MODBUS RTU option




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