Emerson 2700, 1700 5.4Hazardous area output wiring, 5.4.1Hazardous area safety parameters

Output Wiring – Model 1700/2700 Intrinsically Safe Transmitters

Figure 5-6Safe area frequency/discrete output load resistance values

Rmax = (Vsupply – 4)/0.003

Rmin = (Vsupply – 25)/0.006

Absolute minimum = 100 ohms for supply voltage less than 25.6 Volts

	10000
	9000
(Ohms)	8000
	7000
range
	6000
load
R	5000
-up resistor
	4000
	3000							OPERATING REGION
pull	2000
External
	1000
	0
	5	7	9	11	13	15	17	19	21	23	25	27	29

Supply voltage VDC (Volts)

5.4Hazardous area output wiring

The following notes and diagrams are designed to be used as a guide for wiring the Model 1700 or Model 2700 outputs for hazardous area applications.

5.4.1Hazardous area safety parameters

The proper barrier selection will depend on what output is desired, which approval is applicable, and many installation-specific parameters. The information that is provided about I.S. barrier selection is intended as an overview. Refer to barrier manufacturers for more detailed information regarding the use of their products. Application-specific questions should be addressed to the barrier manufacturer or to Micro Motion.

WARNING

Hazardous voltage can cause severe injury or death.

To reduce the risk of hazardous voltage, shut off the power before wiring the transmitter outputs.

Output Wiring – Intrinsically Safe

Output Wiring – Configurable I/O Output Wiring – Fieldbus/PROFIBUS

Specifications

Installation Manual 37