Emerson Rosemount 2140 Quick Start Manual page 13

July 2021
Figure 3-1: Load Limitations
1400
1200
1000
800
A
600
400
200
Maximum loop resistance = 43.5 × (external power supply voltage - 10.5)
A. Loop resistance in Ohms (Ω)
B. External power supply voltage (Vdc)
3.7 Wiring diagram
Figure 3-2: 4-20 mA/HART
A. Handheld communicator
B. Approved IS barrier (for Intrinsically Safe installations only)
C. HART modem
D. Load resistance (≥250 Ω)
E. Current meter
F. Power supply
Quick Start Guide
1392
848
587
250
10.5
0
16.3
0 10
24
20 30 40
B
®
Communication
A
Quick Start Guide
42.4
50
B F
D
E
C
13