Hazardous Area
X-STREAM O
2
Transmitter
4-14
Instruction Manual
IM-106-910C, Rev. 1.0
November 2009
Field Communicator
Signal Line Connections
(with Xi)
Whenever the Hazardous Area X-STREAM O
2
Transmitter includes the Xi
Enhanced Interface option, be sure to connect the 375 Field Communicator
only to the 4 to 20 mA signal loop wiring between the Xi Enhanced Interface
and the control room or data acquisition system as shown in Figure 4-6.
When working at the Xi, the 375 Field Communicator can be connected
directly to test points TP21 and TP22 on the Xi Enhanced Interface I/O Board.
The AM+ and AM- test points are provided to monitor the 4-20 mA signal
without breaking into the loop.
Figure 4-6. 375 Field Communicator Connection at the Xi Enhanced Interface
The Xi Enhanced Interface communicates with the transmitter via HART
communications riding on the 4 to 20 mA signal coming from the transmitter.
Xi communication with the transmitter will be disrupted if a 375 Field
Communicator is connected to the signal loop between the transmitter and
the Xi Enhanced Interface.
Do not
use the H1 and H2 terminals or connect the HART in the probe (transmitter-to-Xi)
4-20 mA signal loop if your system includes the Xi Enhanced Interface. Xi communication
with the transmitter will be disrupted if a 375 Field Communicator is connected to the H1
and H2 terminals or to the transmitter-to-Xi signal loop.
Содержание Rosemount X-STREAM O2 Transmitter
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