Copyright 2013 Baker Hughes Company.
English–DPI
620G Instruction Manual | 79
HART® Connections
9.3.3 Communicator Attached to a Network
In the example that follows, the calibrator connects directly to a network. There must be a 250
Ω
resistor in series with the loop power supply and the HART® device.
Figure
9
-
3: HART® Communicator Network Connection
CH2 function is set to None. The HART® function is enabled on the HART® channel with the
250
Ω resistor is set to Off.
9.3.4 Use of Test Connections
To use the test connection on a HART® transmitter, use CH1 to measure current and CH2 to
communicate with the HART® device. The CH2 function must be set to None, and CH1 function
must be placed into current measure mode. There must be an external HART® resistor in the
loop.
Figure
9
-
4: HART® Device Test Connections
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