Grounding The Transmitter - Emerson Rosemount 2088 Reference Manual

Reference Manual
00809-0100-4108, Rev BA
a.
3.
4.6.4

Grounding the transmitter

Signal cable shield grounding
Signal cable shield grounding is summarized in
and unused shield drain wire must be trimmed and insulated, ensuring that the signal cable
shield and drain wire do not come in contact with the transmitter case. See
grounding" on page 48
below to correctly ground the signal cable shield.
1.
2.
3.
4.
5.
a.
6.
Figure 4-8. Wiring pair and ground
A. Insulate shield and shield drain wire
B. Insulate exposed shield drain wire
C. Terminate cable shield drain wire to earth ground
Electrical installation
connect the powered signal wiring to the test terminals. Power could damage the test
diode.
For 1-5 Vdc HART Output, connect the positive lead to (PWR +) and the negative to the
(PWR -). Do not connect the powered signal wiring to the test terminals. Power could
damage the test diode.
Plug and seal unused conduit connection on the transmitter housing to avoid moisture
accumulation in the terminal side.
for instructions on grounding the transmitter case. Follow the steps
Remove the Field Terminals Housing Cover.
Connect the signal wire pair at the field terminals as indicated in
At the field terminals, the cable shield and shield drain wire should be trimmed close
and insulated from transmitter housing.
Reattach the Field Terminals Housing Cover; cover must be fully engaged to comply
with explosion proof requirements.
At terminations outside the transmitter housing, the cable shield drain wire should be
continuously connected.
Prior to the termination point, any exposed shield drain wire should be insulated as
shown in Figure 4-8 (B).
Properly terminate the signal cable shield drain wire to an earth ground at or near the
power supply.
Section 4: Electrical Installation
Figure 4-8 on page
A
DP
B
C
March 2014
47. The signal cable shield
"Transmitter case
Figure 4-6.
47