6
Reference Manual
00809-0100-4840, Rev CB
Section 2: Transmitter Overview
February 2015
Transmitter Overview
2.3 System architecture
The Rosemount 3101, 3102, and 3105 are two-wire 24 Vdc loop-powered transmitters and can
be connected to a direct current (dc) power source using two-core, shielded cable.
On The Rosemount 3101, the output is a 4–20 mA analog signal.
On The Rosemount 3102 and Rosemount 3105, the output can be a 4–20 mA analog signal and
a digital HART signal.
Note
It is possible to use the multi-drop function with the HART protocol (Figure 2-3). In this case,
communication is restricted to digital since the current is fixed to 4 mA
Each transmitter can be configured locally using the push-buttons (3101) or
membrane-buttons (3102/3105) which are revealed after removing the housing cover.
The 3102 and 3105 transmitters can be easily configured remotely by using a Rosemount 3490
Series Control Unit. Alternatively, a Field Communicator, or a PC with AMS Suite: Intelligent
Device Manager software can be used to configure each transmitter.
A comprehensive specification for the Rosemount 3101, 3102, and 3105 is in the section
“Specifications” on page 77.
Figure 2-3. System Architecture
A. Rosemount 3102 or 3105 Transmitter
B. Two Relay Outputs from Transmitter (Rosemount 3102 only)
C. Remote Temperature Sensor (Optional Accessory for Rosemount 3102 and Rosemount 3105 Transmitters)
D. 751 Display
E. 4–20 mA signal / HART communications
F. Control System
G. Rosemount 3490 Series Control Unit
H. HART Modem
I. Field Communicator
J. AMS Suite: Intelligent Device Manager
3490
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3491
Model type:
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