Emerson MICRO MOTION 1700 - Manual (Page 84)

7.2 HART/analog single loop wiring
Note
For HART communications:
• 600 Ω maximum loop resistance
• 250 Ω minimum loop resistance
HART/analog single loop wiring Figure 7-2:
A
B
A. 820 Ω maximum loop resistance
B. HART-compatible host or controller
I/O wiring for Model 1700 and Model 2700 transmitters with analog outputs
80 Micro Motion ® Model 1700 and 2700