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Quick Start Guide
5
Wiring and power up
About this task
Use the following steps to wire the transmitter:
Procedure
1. Remove the cover on the field terminals side of the housing.
2. Set up based on optional process temperature input.
3. Connect the positive lead from the power source to the "PWR +"
terminal, and the negative lead to the "PWR –" terminal (for power
requirements, reference ).
4. Ensure full contact with terminal block screw and washer. When using
a direct wiring method, wrap wire clockwise to ensure it is in place
when tightening the terminal block screw.
Note
The use of a pin or a ferrule wire terminal is not recommended as the
connection may be more susceptible to loosening over time or under
vibration.
5. Connect the transmitter to the RS-485 bus as shown in
Note
The Rosemount 4088 MultiVariable Transmitter uses RS-485 Modbus
with 8 data bits, one stop bit and no parity. The default baud rate is
9600.
16
a) If the optional process temperature input is being utilized,
follow the procedure
input (Pt 100 RTD
b) If there will not be an optional process temperature input, plug
and seal the unused conduit connection.
NOTICE
When the enclosed threaded plug is utilized in the conduit
opening, it must be installed with a minimum engagement of
five threads in order to comply with explosion-proof
requirements. For straight threads, a minimum of six threads
must be engaged. For tapered threads, install the plug wrench-
tight.
a) Connect the A lead to the "A" terminal.
b) Connect the B lead to the "B" terminal.
Rosemount 4088B MultiVariable Transmitter Quick Start Guide
Install optional process temperature
Sensor).
September 2018
Figure 5-1
®
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