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Quick Installation Guide
00825-0100-4593, Rev BA
July 2009
Rosemount 1151
7
STEP 3: CONNECT THE WIRING AND POWER UP
Use the following steps to wire the transmitter:
1. Remove the housing cover on the side marked TERMINALS on the nameplate.
2. Connect the positive lead to the “+” terminal and the negative lead to the “–” terminal.
Figure 1. Field Wiring Diagram
Installation of the transient protection terminal block does not provide transient protection unless the 1151
case is properly grounded.
3. Ensure proper grounding. It is important that the instrument cable shield:
• be trimmed close and insulated from touching the transmitter housing
• be connected to the next shield if cable is routed through a junction box
• be connected to a good earth ground at the power supply end
NOTE
Do not connect the powered signal wiring to the test terminals. Power could damage the test
diode in the test connection. Twisted pair cable should be used for best results. In high
EMI/RFI environments, use either transient terminal block or shielded signal wiring. Use 12
to 24 AWG wire and do not exceed 5,000 feet (1500 meters).
4. Plug and seal unused conduit connections.
5. If applicable, install wiring with a drip loop. Arrange the drip loop so the bottom is lower
than the conduit connections and the transmitter housing.
6. Replace the housing cover.
R
L
250 ⍀
Optional
Indicator
Current
Meter
Power
Supply
4593_Rev_BA.fm Page 7 Friday, August 7, 2009 3:38 PM