Emerson 2700, 1700 2 HART/analog single-loopwiring, 3 RS-485 point-to-pointwiring, Sensor Wiring

Output Wiring – Model 1700/2700 Analog Transmitters

Figure 4-2HART/analog single-loop wiring

+

–

820 Ω maximum loop resistance

For HART communications:

• 600 Ω maximum loop resistance

• 250 Ω minimum loop resistance

Figure 4-3RS-485 point-to-point wiring

Primary

controller

Multiplexer

RS-485A

RS-485B

HART-

compatible host or controller

Before You Begin

Installing the Transmitter

Sensor Wiring

Other devices

Note: The RS-485 communication wires must be shielded.

Output Wiring – Analog

Installation Manual 31