Users Manual Part 1

b) Attach and tighten the cover.
Note
Make sure the cover is fully engaged. There should be no gap between the
cover and the housing.
c) Turn the jam screw counterclockwise until it contacts the cover.
Note
Required for explosion-proof/flameproof installations only.
H2.5 mm
d) Turn the jam screw an additional ½ turn counterclockwise to secure the
cover.
12.
Connect the power supply.
4.5 Optional devices
4.5.1 Rosemount
™
333 HART
®
Tri-Loop
™
The Rosemount 3408 outputs a HART signal with four process variables. By using the
Rosemount 333 HART Tri-Loop, up to three additional analog 4-20 mA outputs are
provided.
Each Tri-Loop channel receives power from control room. Channel 1 must be powered for
the Tri-Loop to operate.
The transmitter receives power from control room.
Electrical installation Reference Manual
September 2022
00809-0100-4418
36 Emerson.com/Rosemount