Emerson 1700, 2700 installation manual Frequency output wiring

Output Wiring – Model 2700 Configurable I/O Transmitters

Figure 6-4HART multidrop wiring with SMART FAMILY™ transmitters and a configuration tool

	HART-compatible	Model 2700				24 VDC loop power
		configurable I/O
	transmitters				™		supply required for
		transmitter
			SMART FAMILY					HART 4–20 mA
HART-compatible		(internally powered		transmitters
						passive transmitters
		outputs)
host or controller

600 Ω maximum resistance

250 Ω minimum resistance

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

6.4Frequency 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.

44 Micro Motion® Model 1700 and 2700 Transmitters