Yokogawa EJX930A - Manual (Page 11)

<2. Connection>
2-4
IM 01C25R02-01E
2.6 Power Supply Voltage and
Load Resistance
When configuring the loop, make sure that the
external load resistance is within the range in the
figure below.
(Note) With an intrinsically safe transmitter, external load
resistance includes safety barrier resistance.
600
250
0 10.5 16.6 25.2 42
External
load
resistance
R (Ω)
Power supply voltage E (V DC)
F0203.ai
Communication
applicable range
R= E–10.5
0.0244
Figure 2.3 Relationship between Power Supply
Voltage and External Load Resistance