Emerson 1700 User Manual

Micro Motion

Model 1700 and 2700 Transmitters

Output Wiring – Model 2700 Configurable I/O Transmitters

Figure 6-4

HART multidrop wiring with SMART FAMILY

™

transmitters and a configuration tool

6.4

Frequency output wiring
Frequency output wiring depends on whether you are wiring terminals 3 and 4 (Channel B) or
terminals 5 and 6 (Channel C), and also on whether you have configured the terminals for internal or
external power. The following diagrams are examples of proper wiring for these configurations:

•

Channel B, internal power – Figure 6-5

•

Channel B, external power – Figure 6-6

•

Channel C, internal power – Figure 6-7

•

Channel C, external power – Figure 6-8

Note: If both Channel B and Channel C are configured for frequency output, the Channel C signal is
generated from the Channel B signal, with a user-specified phase shift. The signals are electrically
isolated but not independent. This configuration is used to support dual-pulse and quadrature modes.
For more information, see the manual entitled Series 1000 and 2000 Transmitters Configuration and
Use Manual.

HART-compatible

host or controller

HART-compatible
transmitters

SMART FAMILY

™

transmitters

Note: For optimum HART communication,
make sure the output loop is
single-point-grounded to an
instrument-grade ground.

24 VDC loop power

supply required for

HART 4–20 mA

passive transmitters

Model 2700
configurable I/O
transmitter
(internally powered
outputs)

600

Ω maximum resistance

250

Ω minimum resistance