Emerson Rosemount 2051HT Quick Start Manual page 10

Quick Start Guide
2.5 Connect the wiring and power up
Use copper wire of sufficient size to ensure the voltage across the
transmitter power terminals does not drop below 9 Vdc. Power supply
voltage can be variable, especially under abnormal conditions such as when
operating on battery backup. A minimum of 12 Vdc under normal operating
conditions is recommended. Shielded twisted pair type A cable is
recommended.
Use the following steps to wire the transmitter:
Procedure
1. To power the transmitter, connect the power leads to the terminals
indicated on the terminal block label.
Note
The Rosemount 2051 power terminals are polarity insensitive, which
means the electrical polarity of the power leads does not matter
when connecting to the power terminals. If polarity sensitive devices
are connected to the segment, terminal polarity should be followed.
When wiring to the screw terminals, the use of crimped legs is
recommended.
2. 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. No additional power
is needed.
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.
3. Ensure proper grounding. It is important the instrument cable shield
be:
4. Trimmed close and insulated from touching the transmitter housing.
5. Connected to the next shield if cable is routed through a junction
box.
6. Connected to a good earth ground at the power supply end.
7. If transient protection is needed, refer to section
wiring" for grounding instructions.
8. Plug and seal unused conduit connections.
9. Reattach the transmitter covers. It is recommended that the cover be
tightened until there is no gap between the cover and the housing.
10
November 2019
"Signal ground
Emerson.com/Rosemount