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Installation Manual 31
Output Wiring – Model 1700/2700 Analog Transmitters
Installing the Transmitter Output Wiring – AnalogSensor WiringBefore You Begin Installing the Transmitter Output Wiring – AnalogSensor WiringBefore You Begin Installing the Transmitter Output Wiring – AnalogSensor WiringBefore You Begin Installing the Transmitter Output Wiring – AnalogSensor WiringBefore You Begin
Figure 4-2 HART/analog single-loop wiring
Figure 4-3 RS-485 point-to-point wiring
820 Ω maximum loop resistance
For HART communications:
• 600 Ω maximum loop resistance
• 250 Ω minimum loop resistance
+
–
HART-
compatible host
or controller
Note: The RS-485 communication wires must be shielded.
Other devices
RS-485A
RS-485B
Primary
controller
Multiplexer