3
95-8577
5.3
Multidrop Mode
Optical flame detectors are life safety devices
and require the 0-20 mA loop for transmitting
important detector status data. They should not
be used in conjunction with multidrop mode. If
multidrop mode is a requirement, the alarm and
fault relay contacts must be connected directly
to the safety system or fire panel for signalling
purposes.
NOTE
RS-485 Modbus communication is not
available on HART equipped models.
NOTE
This addendum covers HART wiring only.
Refer to the device instruction manual
for NFPA-72 compliant releasing wiring
diagrams.
HART DEVICE DESCRIPTION LANGUAGE
The HART protocol incorporates a concept
called the Device Description Language (DD)
that enables all suppliers of HART instruments to
define and document their products in a single
consistent format. This format is readable by
handheld communicators, PCs and other process
interface devices that support DD. DD enables
full interoperability of devices, regardless of
manufacturer, allowing full functionality from any
HART device.
In the event that your Communicator does not
establish communications with the X3301, ensure
that the appropriate DDs for the X3301 have
been programmed into your Communicator. To
review the DDs programmed into your HART
Communicator:
1. From the Main menu, access the Offline
menu.
2. From the Offline menu, select "New
Configuration" to access the list of device
descriptions programmed into the HART
Communicator.
3. Select "Det-Tronics" and review the list of
models to determine if the X3301 DDs are
installed in your Communicator.
If the X3301 DDs have not been programmed into
the Memory Module, you must use the generic
interface built into your HART Communicator.
The HART Communication Foundation manages
a library of Manufacturer Device Descriptions,
which are distributed to programming sites for
inclusion in master devices. A complete listing of
the HCF DD Library is available for download in
manufacturer and device type sequence at
en.hartcomm.org.
DETECTOR WIRING
Refer to the X3301 instruction manual (form
number 95-8527 or 95-8704) for complete
instructions regarding detector installation and
wiring. However, note that the device power
consumption specifications for the HART model
are different than the standard model.
Power Consumption Specifications of X3301
Detector with HART Communication
Without heater: 4.7 watts at 24 Vdc nominal;
6.1 watts at 24 Vdc in alarm.
5.5 watts at 30 Vdc nominal;
7.4 watts at 30 Vdc in alarm.
Heater only: 8 watts maximum.
Total power: 17 watts at 30 Vdc with EOL
resistor installed and heater on
maximum.
EOL resistor must be ceramic, wirewound
type, rated 5 watts minimum, with actual power
dissipation not to exceed 1.5 watts.
HIB Hdwr Flt
When a HART field communicator is first connected
to the detector, a "HIB Hdwr Flt" message may
be displayed. If this message is displayed, set
the Real Time Clock (RTC) using the HART field
communicator as detailed in the Real Time Clock
section of this manual. See Marketing Bulletin 78-
1026 for further information.
