—
Perform detector diagnostics.
—
Troubleshoot.
For more details, refer to the
Rosemount 975 Flame Detector HART
Communication Manual (00809-0200-4975)
•
Communication network: The detector is equipped with an RS-485
communication link that can be used in installations with computerized
controllers.
The communication protocol is Modbus
®
compatible.
—
This protocol is standard and widely used.
—
It enables continuous communication between a standard Modbus
controller (master device) and a serial network of up to 247 detectors.
Heated
optics
The front window can be heated to improve performance in icing,
condensation, and snow conditions. The heater increases the temperature
of the optical surface by 5 to 8 °F (3 to 5 °C) above the ambient temperature.
The heated optics can be configured in three ways:
•
OFF: The optics are not heated.
•
ON: The optics are heated continuously.
•
AUTO: Operated only when the change of temperature requires heating
(default).
In AUTO mode, you can define the start heating temperature between 32
and 122 °F (0 and 50 °C). The detector stops heating the window when the
temperature is 27 °F (15 °C) above the start temperature.
A.4
Mechanical specifications
Enclosure
Stainless steel 316
Water and dust tight
•
NEMA
®
250 type 6p.
•
IP66 and IP67 per EN 60529
Electronic modules
Conformal coated
Electrical connection (two entries)
•
¾
-in. -14 national pipe thread (NPT) conduit or
•
M25 x 1.5
Dimensions
4 x 4.6 x 6.18 in. (101.6 x 117 x 157 mm)
Weight
6.1 lb. (2.8 kg)
A.5
Environmental specifications
The Rosemount 975HR is designed to withstand harsh environmental conditions.
High temperature
•
Designed to meet DNVGL-CG-0339, class D
Specifications and reference data
Reference Manual
June 2021
00809-0100-4976
54
Emerson.com/Rosemount
Legacy
Содержание Rosemount 975HR
Страница 28: ...Introduction Reference Manual June 2021 00809 0100 4976 28 Emerson com Rosemount L e g a c y ...
Страница 42: ...Installing the detector Reference Manual June 2021 00809 0100 4976 42 Emerson com Rosemount L e g a c y ...
Страница 66: ...RS 485 communication network Reference Manual June 2021 00809 0100 4976 66 Emerson com Rosemount L e g a c y ...
Страница 78: ...SIL 2 features Reference Manual June 2021 00809 0100 4976 78 Emerson com Rosemount L e g a c y ...