Users Manual Part 1

2.6 System integration
The transmitter is loop-powered, and uses the same two wires for power supply and
output signal. The output is a 4-20 mA analog signal superimposed with a digital HART
®
signal.
By using the optional Rosemount 333 HART Tri-Loop
™
, the digital HART signal can be
converted into three additional 4-20 mA analog signals.
With the HART protocol, multidrop configuration is possible. In this case, communication
is restricted to digital, since current is fixed to the 4 mA minimum value.
The transmitter can be combined with the Emerson Wireless 775 THUM
™
Adapter to
wirelessly communicate HART data with IEC 62591 (WirelessHART
®
) technology. In
addition, the transmitter can be connected to a Rosemount 751 Field Signal Indicator, or it
can be equipped with an integral display (available with optional Bluetooth
®
wireless
technology).
Figure 2-3: System Architecture
A
C
B
E
D
F
G
H
I
J
A. Emerson Wireless 775 THUM Adapter
B. Rosemount 3408
C. Rosemount 751
D. Wireless communication using Bluetooth
®
technology
E. Handheld communicator
F. Approved IS barrier (for Intrinsically Safe installations only)
G. Rosemount 333
H. Host/DCS system
I. HART modem
J. PC with Rosemount Radar Master Plus
The Rosemount 3408 is compliant with NAMUR NE 107 Field Diagnostics for standardized
device diagnostic information.
Reference Manual Transmitter overview
00809-0100-4418
September 2022
Rosemount 3408 Level Transmitter 13