Emerson Rosemount 975 Series, Reference Manual

Page: 8 / 44

Rosemount 975UR
The Rosemount 975UR is an ultra-fast UV/IR flame detector that is able to detect in under
20 msec, and features a unique dual sensor with selectable UV and IR channels that can be
used separately or combined. The detector is designed to detect hydrocarbon-based fuel
and gas fires.
Table 1-1: Rosemount 975 Series General Technical Specifications
Spectral response Infrared and ultraviolet bands
Response time Varies according to model, typically under 5 seconds
Field of view Varies according to model, up to 100 degrees
Output 4-20 mA, relays, communication
Enclosure Stainless steel 316 or aluminum polyurethane painted
Operating voltage 18-32 Vdc
Maximum power rating 9.6 W
Relay contacts 2A/30 Vdc
Over voltage category 2
Relative humidity Non-condensing relative humidity up to 100%
NOTICE
If the product is used outside of specified limits, this voids the product certification, and
Emerson is not responsible for any incurred warranty expense.
NOTICE
Do not open this product, except for the terminal compartment as listed in this document,
under any circumstances.
NOTICE
The device is not field-repairable due to the meticulous alignment and calibration of the
sensors and the respective circuits.
Do not attempt to modify or repair the internal circuits or change their settings, as this will
impair the system's performance and void the Emerson product warranty.
NOTICE
Opening the attachment screws to dismantle the front part of the detector form the
remaining parts is restricted and voids the product warranty.
Introduction Reference Manual
February 2022 00809-1400-4975
8 Emerson.com/Rosemount