Emerson MICRO MOTION 1700 - Manual (Page 95)

8.5.2 Hazardous area frequency/discrete output wiring using
galvanic isolator
Hazardous area frequency/discrete output wiring using galvanic
isolator
Figure 8-10:
Hazardous area Safe area
A
B C
D
E
A. External power supply
B. V
out
C. R
load
D. Galvanic isolator (see note)
E. Counter
Note
The galvanic isolator shown here has an internal 1000 Ω resistor used for sensing current:
• ON > 2.1 mA
• OFF < 1.2 mA
I/O wiring for Model 1700 and Model 2700 transmitters with intrinsically safe outputs
Installation Manual 91