Emerson Rosemount 975MR, Справочное руководство

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Table 1-3: Output Configurations
(continued)
Output
configuration Connections provided
1R Power Manual built-
in test Fault relay
N.C. Alarm relay
N.O. Auxiliary
N.O. RS-485 N/A
2R Power Manual built-
in test Fault relay
N.O. Alarm relay
N.O. Auxiliary
N.O. RS-485 N/A
NOTICE
Output configuration 1A is default. You can change the mA sink output to source type,
with a link between terminals 1 and 8. You cannot change any other output configurations
on site.
For example, product number 975MR3A8S2A1 has the following options:
• Output configuration: 3A (analog/HART/RS-485/relays, fault N.O., alarm N.O./N.C.,
source)
• Housing style: 8S (stainless steel - M25 conduit entry)
• Temperature: 2 (185 °F [85 °C])
• Approvals: A1 (ATEX and IECEx flameproof)
NOTICE
Check your specific part numbers against the information in Checking the product type .
1.3 Features and benefits
The flame detector has the following features and benefits.
• Detection range: Up to 215 ft. (65 m) for a 1 ft.
2
(0.1 m
2
) n-heptane fire.
• Ultra high immunity to false alarms. See Table 1-6 .
• Advanced digital processing of the dynamic characteristics of fire: flickering, threshold,
correlation, and ratio.
• Multi IR channels: between two and five microns.
• Field programmable sensitivity: four ranges to avoid zone crossover.
• Built-in-test (BIT): manual and automatic (see Built-in test (BIT) ).
• Heated window: prevents effects of icing, snow, and condensation.
• Electrical interface:
— Dry contact relays
— Communication network RS-485
— 0-20 mA output
• HART
®
protocol: communication protocol (see HART protocol ).
Introduction Reference Manual
August 2019 00809-0100-4975
10 Emerson.com/Rosemount