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AC Input Isolating, Field Configurable Two-Wire Transmitter
T761

Provides an Isolated Current Loop in Proportion to an AC Input

  • Eliminates Ground Loops
  • Easy Field Configurable Switch Selectable Input Ranges
  • Wide Ranging Zero and Span Adjustability (80%)
  • Protects Equipment with 600V Input-to- Output Isolation
  • Three Year Warranty
  • Datasheet
 

The T761 offers the user a choice of 12 widely adjustable input ranges and 2 output ranges, which are field selectable via top-accessed DIP switches (see Table 1). The T761 provides 600 VDC of isolation with outputs of either 4-20mA or 10-50mA. Current outputs are in proportion to selected AC voltage or current input.

Model T761 measures the average value of the AC input signal and is calibrated for sine wave signals over a frequency range of 20Hz to 3KHz. For other wave forms, the calibration may be different, but the T761 will remain linear for the same wave form. For example, if the unit is calibrated using a square wave, the calibration will be valid for all square wave inputs in that range. The maximum DC component of the input signal is 50% of the range (e.g., 75VDC is half of a 0-150VAC range).

A major advantage of the T700 Series is their truly wide ranging capability. The T761 enables 80% zero and span adjustability within most user-selected input ranges. For example, Range 3 of Table 1 specifies 0 to 25V with a minimum span of 5V (25V-5V = 20V, or 80%). This 80% adjustability factor allows the user to field-calibrate the unit for the maximum (0 to 25V) down to any minimum (5V) span (e.g. 10V to 15V)--as long as that adjusted span remains within the selected 0 to 25V range.

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