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95-8577
5.3
Digital communication with the X3301 allows the
operator to monitor the status of the detector,
determine factory settings, adjust field settings,
and initiate field tests. This addendum provides
guidance for establishing HART communication,
and describes the HART menu structure
when using the X3301 with a HART Handheld
Communicator, a PC, or other process interface
device that supports Device Description
Language (DD).
NOTE
A minimum level of understanding with
regard to the operation and navigation of
the HART Communicator is required. Refer
to the instruction manual supplied with the
HART Communicator for basic operating
instructions.
INTERCONNECTING THE HART
COMMUNICATOR WITH THE DETECTOR
Point-to-Point Mode
The HART Communicator can connect to the
X3301 at any wiring termination point in the
analog output signal loop. Connect the HART
Communicator in parallel with the X3301 analog
signal or load resistor. The HART connections are
non-polarized.
IMPORTANT WIRING NOTE
The HART Communicator does not
measure loop current directly, but instead
reads a voltage signal across a resistance
(250 ohms) in the loop. The recommended
connection point is across the input
impedance of the signal receiver (PLC),
which is a nominal 250 ohms. See Figures
1 to 4. If testing/programming on a bench,
a 250 ohm load resistor must be used. See
Figure 5.
Switch on the HART Communicator. If a device
is found, the HART Communicator displays
the Main menu. If no device is found, check
the connections and verify the presence of a
minimum of 250 ohms load resistance in series
in the loop.
ADDENDUM
HART
Communication
with the X3301
Multispectrum IR Flame Detector
©Detector Electronics Corporation 2018
Rev: 1/16
