Emerson MICRO MOTION 1700 - Manual (Page 88)

Safe area mA output load resistance values Figure 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. 250W and 17.5V required for HART communication
8.2 Safe area HART/analog single-loop wiring
Safe area HART/analog single-loop wiring Figure 8-3:
A
B
c
A. 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
84 Micro Motion ® Model 1700 and 2700