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1 Introduction
The TX91 transmitter is normally powered by an unregulated DC
power supply as shown in Figure 1-3. The proportionally-transmit-
ted signal begins at 4 mA, at the low end of its temperature range,
and increases to 20 mA, at the high end of its temperature range.
(There are various temperature ranges and thermocouple types
available for the TX91. To order, refer to Section 1.3 for correct
Model Numbers and Range Codes.)
Figure 1-3. TX91 Thermocouple Transmitter
Input
THERMOCOUPLE
COPPER
WIRES
TX91
THERMOCOUPLE
TRANSMITTER
DC SUPPLY
11-44 VDC