Transient Protection Terminal Block - Emerson Rosemount 3051 Reference Manual

Electrical Installation
August 2016
3. Replace the housing cover. It is recommended the cover be tightened until there is no
gap between the cover and the housing.
4. Plug and seal unused conduit connections.
Power supply
The dc power supply should provide power with less than two percent ripple. The
transmitter requires between 9 and 32 Vdc at the terminals to operate and provide
complete functionality.
Power conditioner
The DP/PA Coupler/Link often includes an integrated power conditioner.
Grounding
Transmitters are electrically isolated to 500 Vac rms. Signal wiring can not be grounded.
Shield wire ground
Grounding techniques for shield wire usually require a single grounding point for shield wire
to avoid creating a ground loop. The ground point is typically at the power supply.
4.6.4

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 Rosemount 3051
Transmitters in the field. See
lightning bolt symbol shown in
Figure 4-7. Wiring with Transient Protection
A. Transient protection symbol
38
"Spare parts" on page 116
Figure 4-7 identifies the transient protection terminal block.
A
Reference Manual
00809-0100-4797, Rev DA
for spare part numbers. The
Electrical Installation