
Reference Manual
00809-0100-4716, Rev JA
May 2008
2-19
Rosemount 3095 MultiVariable
Check for Leaks
5.
Check all process penetrations for leaks.
Power and Signal Wiring
6.
Make field wiring connections (see Figure 2-6 or Figure 2-12). These
connections provide both power and signal wiring.
NOTES
• Do not run field wiring in conduit or open trays with other power
wiring, or near heavy electrical equipment.
• Field wiring need not be shielded, but use twisted pairs for
best results.
• To ensure communication, wiring should be 24 AWG or larger
and not exceed 5,000 feet (1,500 meters).
• For connections in ambient temperatures above 140 °F (60 °C), use
wiring rated for at least 194 °F (90 °C).
a. Remove the cover on the side marked FIELD TERMINALS on the
electronics housing.
b. Connect the lead that originates at the positive side of the power
supply to the terminal marked “+ SIG” or “+ PWR.” Be sure to
include loop resistance.
NOTE
Incorrect field wiring connections may damage the 3095. Do not connect field
wiring to the “TEST +” terminals.
c. Connect the lead that originates at the negative side of the power
supply to the terminal marked “–.”
d. Plug and seal unused conduit connections on the transmitter
housing to avoid moisture accumulation in the terminal side of the
housing.
NOTE
If the conduit connections are not sealed, mount the transmitter with the
electrical housing positioned downward for drainage. Conduit should be
installed with a drip loop, and the bottom of the drip loop should be lower than
the conduit connections or the transmitter housing.
Grounding
7.
Install field wiring ground (optional), and ground the transmitter case
(required).
For explosion-proof installations, wiring connections must be made in accordance with
Rosemount drawing 03095-1025 or 03095-1024.
For instrinsically safe installations, wiring connections must be made in accordance
with ANSI/ISA-RP12.6, and Rosemount drawings 03095-1020 or 03095-1031.
For
ALL
installations, wiring connections must be made in accordance with local or
national installation codes such as the NEC NFPA 70.
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