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Reference Manual
IP2030/RM, Rev AA
Section 4: Getting started
June 2014
Section 4: Getting started
4.2.2 Switching on with one 4–20 mA transmitter connected
After applying power with a 4–20 mA transmitter connected, the Full PV Display appears and
indicates a control unit Primary / Process Value (PV) of zero. It is then necessary to configure the
control unit for a 4–20 mA input instead of a digital HART input.
See “Optional change: transmitter input channel settings (advanced users)” on page 43 for this
procedure.
4.3 Switching on the MCU902 for the first time
The Mobrey MCU902 takes the input from two HART transmitters and calculates a single sum,
difference, or product of the two inputs.
It is important to connect the two HART transmitters in the correct sequence, as detailed in
“Connecting HART transmitters to the Mobrey MCU902” on page 18.
After both HART transmitters are connected, the top-left corner shows communications with
both transmitters by alternating “1” and “2” next to the digital communications icon.
The factory default configuration shows the reading from the first connected transmitter (Tx1).
This configuration can be changed to show the sum, difference or product of the readings from
both transmitters.
Figure 4-4. The MCU902 and two HART transmitters
A. Mobrey MCU900 Series Control Unit D. Transmitter [1] Bottom Reference
B. Mobrey MSP Series Transmitter E. Transmitter [2] Bottom Reference
C. HART Communications
C
A
D
B
E
C