Emerson 3051S Especificaciones Pagina 36

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26
Reference Manual
00809-0100-4001, Rev JA
Section 2: Installation
November 2012
Installation
Power supply for 1-5 Vdc HART low power
Low power transmitters operate on 6-14 Vdc. The dc power supply should provide power with
less than two percent ripple. The V
out
load should be 100 k or greater.
2.9.3 Transient protection terminal block
The transmitter will withstand electrical transients of the energy level usually encountered in
static discharges or induced switching transients. However, high-energy transients, such as
those induced in wiring from nearby lightning strikes, can damage the transmitter.
The transient protection terminal block can be ordered as an installed option (Option Code T1 in
the transmitter model number) or as a spare part to retrofit existing 3051 transmitters in the
field. See “Spare parts” on page 164 for spare part numbers. The lightning bolt symbol shown in
Figure 2-19 and Figure 2-20 identifies the transient protection terminal block.
Figure 2-19. 4-20 mA HART wiring with transient protection
R
L
250
Power
Supply
Power
Supply
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