Hazardous Area Output Wiring; Hazardous Area Safety Parameters - Emerson MICRO MOTION 2700 Installation Manual

Output Wiring – Model 1700/2700 Intrinsically Safe Transmitters
Figure 5-6 Safe area frequency/discrete output load resistance values
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
5
5.4

Hazardous 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.
5.4.1

Hazardous 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.
Hazardous voltage can cause severe injury or death.
To reduce the risk of hazardous voltage, shut off the power before wiring the
transmitter outputs.
Installation Manual
R
max
R = (V
min
Absolute minimum = 100 ohms for supply voltage less than 25.6 Volts
7 9 11 13 15
Supply voltage VDC (Volts)
WARNING
= (V – 4)/0.003
supply
– 25)/0.006
supply
OPERATING REGION
17 19 21 23 25 27 29
37