User`s manual

<6. Wiring>
6-5
IM 01C25B01-01E
6.5 Grounding
Groundingisalwaysrequiredfortheproper
operation of transmitters. Follow the domestic
electricalrequirementsasregulatedineach
country. For a transmitter with a built-in lightning
protector, grounding should satisfy ground
resistanceof10Ωorless.
Ground terminals are located on the inside and
outside of the terminal box. Either of these terminals
may be used.
Ground terminal
(inside)
Ground terminal
(outside)
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Figure 6.16 Ground Terminals
6.6 Power Supply Voltage and
Load Resistance
For 4 to 20 mA output only.
Whenconguringtheloop,makesurethatthe
external load resistance is within the range in the
gurebelow.
(Note) In case of 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)
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Communication
applicable range
BRAIN and HART
R=
E–10.5
0.0244
Figure6.17 RelationshipbetweenPowerSupply
Voltage and External Load Resistance