22
Reference Manual
00809-0100-4021, Rev GC
Section 2: Installation
April 2014
Installation
Power/current loop connections
Use copper wire of a sufficient size to ensure that the voltage across the transmitter power
terminals does not go below 12.0 Vdc.
1. Connect the current signal leads as shown in Figure 2-11.
2. Recheck the polarity and connections.
3. Turn the power ON.
For information about multichannel installations, refer to page 20.
Note
Do not connect the power/signal wiring to the test terminal. The voltage present on the
power/signal leads may burn out the reverse-polarity protection diode built into the test
terminal. If the test terminal’s reverse polarity protection diode is burned out by the incorrect
power/signal wiring, the transmitter can still be operated by jumping the current from the test
terminal to the “–” terminal. See “Test terminal (HART / 4–20 mA only)” on page 176 for use of
the terminal.
Figure 2-11. Connecting a Field Communicator to a Transmitter Loop (HART/ 4–20 mA).
Power/Signal terminals
The signal wire may be grounded at any
point or left ungrounded.
Power
supply
250 R
L
1100
AMS Device Manager software or a Field Communicator can be connected at any
termination point in the signal loop. The signal loop must have between 250 and 1100
ohms load for communications.
or*
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