Det-Tronics X3301 Multispectrum IR Flame Detector with HART - Manual (Page 3)

Digital communication with the X 3301 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 X
3301 with a HART Handheld
Communicator, a PC, or other process interface device
that supports DDL.
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 X
3301 at
any wiring termination point in the analog output signal
loop. Connect the HART communicator in parallel with
the X
3301 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 X 3301
Multispectrum IR Flame Detector
3 .1 © Detector Electronics Corporation 2013 Rev: 10/13 95-8577