Emerson Micro Motion 1700 - Safe Area Hart;Analog Single-Loop Wiring

Safe area mA output load resistance valuesFigure 8-2:
1000
900
800
700
600
500
400
300
200
100
0
12 14 16 18 20 22 24 26 28 30
OPERATING REGION
Supply voltage VDC (Volts)
External resistor R
load
(Ohms)
R
max
= (V
supply
– 12)/0.023
Min. 250Ω and 17.5V required for HART communication
8.2 Safe area HART/analog single-loop wiring
Safe area HART/analog single-loop wiringFigure 8-3:
A
mA1
C
B
A. External DC power supply (VDC)
B. R
load
(250–600 Ω resistance)
C. HART-compatible host or controller
I/O wiring for Model 1700 and Model 2700 transmitters with intrinsically safe outputs
82 Micro Motion
®
Model 1700 and 2700