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Figure 2-4: Detector with Cover Removed

A. Terminal chamber

B. Terminals

C. Internal earth terminal

D. Earth terminal

E. Detector holding screw
F. Conduit/cable entry

G. See

Table 2-2

H. Alarm relay (C)

I. Alarm relay (normally open)
J. Fault relay (C)

K. Manual built-in test (BIT)

Reference Manual

Installing the detector

00809-0100-4976

June 2021

Rosemount 975HR

Legacy

Summary of Contents for Rosemount 975HR

Page 1: ...Reference Manual 00809 0100 4976 Rev DC June 2021 Rosemount 975HR Multi Spectrum Infrared Hydrogen Flame Detector L e g a c y ...

Page 2: ...he licensed firmware embodied in the Goods will execute the programming instructions provided by Seller b that the Goods manufactured by Seller will be free from defects in materials or workmanship under normal use and care and c Services will be performed by trained personnel using proper equipment and instrumentation for the particular Service provided The foregoing warranties will apply until t...

Page 3: ...al support for this product contact your local Rosemount representative or the Rosemount Technical Support department at 1 866 347 3427 or safety csc emerson com Return of material To expedite the repair and return of this product proper communication between the customer and the factory is important Before returning a product for repair call 1 866 347 3427 or email safety csc emerson com for a re...

Page 4: ...ight emitting diode LPG Liquified petroleum gas mA Milliamps 0 001 amps Modbus Master slave messaging structure N C Normally closed N O Normally open N A Not applicable NFPA National Fire Protection Association NPT National pipe thread PN Part number SIL Safety integrity level UNC Unified coarse thread Vac Volts alternating current Vdc Volts direct current 4 L e g a c y ...

Page 5: ...r 3 Operating the detector 43 3 1 Power up 43 3 2 Safety precautions 43 3 3 Testing procedures 44 Chapter 4 Maintenance and troubleshooting 47 4 1 Maintenance 47 4 2 Troubleshooting 48 Appendix A Specifications and reference data 51 A 1 Technical specifications 51 A 2 Electrical specifications 51 A 3 Outputs 52 A 4 Mechanical specifications 54 A 5 Environmental specifications 54 Appendix B Wiring ...

Page 6: ... 73 D 5 Air shield PN 00975 9000 0005 74 Appendix E SIL 2 features 75 E 1 Safety relevant parameters 75 E 2 Guidelines for configuring installing operating and service 75 Appendix F End of line resistor 79 Contents Reference Manual June 2021 00809 0100 4976 6 Emerson com Rosemount L e g a c y ...

Page 7: ...ers as well as performing other maintenance and monitoring tasks is possible by means of RS 485 based Modbus communication or HART communication in models with 0 20 mA output The detector enclosure is ATEX certified Exd flameproof with an integral segregated rear Exe terminal compartment avoiding exposure of the sensors and electronics to surrounding environment Hence the combined approval Ex II 2...

Page 8: ...als Rosemount 975 Flame Detector HART Communication Manual 00809 0200 4975 or WinHost Configuration and Diagnostic Software for Rosemount 975 Flame Detectors 00809 0300 4975 CONFIGURE VIEW PRODUCT Typical model number 975HR1A6A1A1 The starred offerings represent the most common options and should be selected for best delivery The non starred offerings are subject to additional delivery lead time 1...

Page 9: ...ly open N A 2R RS 485 relays fault alarm auxiliary Normally open Normally open Normally open N A 1 2 4 Housing style Code Material Conduit entry 6A 1 Aluminum in national pipe thread NPT 8A 1 Aluminum M25 6S Stainless steel in NPT 8S Stainless steel M25 1 Aluminum housing is not available in FM CSA product certification 1 2 5 Temperature Code Description 1 167 F 75 C 2 185 F 85 C 1 2 6 Product cer...

Page 10: ...Alarm relay N O 0 20 mA sink RS 485 HART 2A Power Manual built in test Fault relay N C Alarm relay N O N C 0 20 mA source RS 485 HART 3A Power Manual built in test Fault relay N O Alarm relay N O N C 0 20 mA source RS 485 HART 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...

Page 11: ...ossover 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 Exde integral junction box for easy wiring SIL 2 TÜV approved Hazardous area certification ATEX IECEx FM and CSA Functionality app...

Page 12: ...The heater increases the temperature of the optical surface by 5 to 8 F 3 to 5 C above the ambient temperature to improve performance in icing condensation and snow conditions The heated optics can be set to one of the following Off not operating On continuously Automatic per temperature change default the operator can define the start temperature below which the window is heated The default is 41...

Page 13: ...TÜV EN54 10 InMetro UL TR CU EAC ATEX IECEx The flame detector is certified to ATEX per SIRA 15ATEX1364X and IECEx per IECEx SIR 15 0138X Ex II 2G D Ex db eb op is IIC T4 Gb Ex tb op is IIIC T96 C Db 55 C Ta 75 C or Ex II 2G D Ex db eb op is IIC T4 Gb Ex tb op is IIIC T106 C Db 55 C Ta 85 C The accessories tilt mount PN 00975 9000 0001 weather cover PN 00975 9000 0003 plastic and PN 00975 9000 000...

Page 14: ... service see SIL 2 features and TUV Report No 968 FSP 1223 EN54 10 The flame detector is approved per EN54 10 and CPD The detector is listed as Class 1 for sensitivity settings 15 30 45 and 60 and Class 2 for sensitivity settings 15 30 45 and 60 The detector has been tested and approved per EN54 10 Vds This test includes functional test environmental test EMI EMC test and software check For more d...

Page 15: ...rd fire Standard fire Defined as 1 ft 2 0 1 m2 n heptane pan fire with maximum wind speed of 6 5 ft sec 2 m sec Sensitivity ranges The detector has four user selectable sensitivity ranges For each range there are two response levels Warning Pre alarm Alarm The detection distance for the Warning level is approximately 10 percent higher than the Alarm distance Alarm response times for a standard fir...

Page 16: ... as 100 percent sensitivity For fuel fire standard pan fire size 1 ft 2 0 1 m2 For gas flame 30 in 0 75 m high 10 in 0 25 m wide plume fire Maximum response time 10 sec Table 1 2 Fuel Sensitivity Ranges Type of fuel Percent of max distance at each sensitivity range Max distance ft m Gasoline 100 215 65 n Heptane 100 215 65 JP5 70 150 45 Kerosene 70 150 45 Diesel fuel 70 150 45 Ethanol 95 60 135 40...

Page 17: ... 2 20 in 0 5 m high 8 in 0 2 m wide plume fire Reference Manual Introduction 00809 0100 4976 June 2021 Rosemount 975HR 17 L e g a c y ...

Page 18: ...asoline Horizontal 80 Vertical 80 Figure 1 1 Vertical and Horizontal Field of View for Gasoline Hydrogen Horizontal 70 Vertical 80 Introduction Reference Manual June 2021 00809 0100 4976 18 Emerson com Rosemount L e g a c y ...

Page 19: ...Figure 1 2 Horizontal Field of View for Hydrogen Reference Manual Introduction 00809 0100 4976 June 2021 Rosemount 975HR 19 L e g a c y ...

Page 20: ...arm Sources Radiation source Immunity distance ft m Indirect or reflected sunlight IAD Vehicle headlights low beam conforming to MS53023 1 IAD Incandescent frosted glass light 300 W IAD Fluorescent light with white enamel reflector standard office or shop 70 W or two 35 W IAD Electric arc 15 32 in 12 mm gap at 4 000 Vac 60 Hz IAD Introduction Reference Manual June 2021 00809 0100 4976 20 Emerson c...

Page 21: ...eater 3 000 W 3 1 Radiation heater 1 000 W with fan IAD Quartz lamp 1 000 W 3 1 Mercury vapor lamp IAD Grinding metal IAD Lit cigar 1 0 3 Lit cigarette 1 0 3 Match wood stick including flare up 13 4 1 IAD Immune at any distance 2 All sources are chopped from 0 to 20 Hz Table 1 4 Welding Immunity Distance Sensitivity setting Detection range Immunity distance 1 50 ft 15 m 6 ft 2 m 2 100 ft 30 m 12 f...

Page 22: ...tor LED 1 5 5 Output signals Outputs are available according to the default configuration or the wiring options selected for the detector Determine the outputs of your model according to Table 1 6 The detector incorporates several types of output suitable to different control systems 0 20 mA stepped with HART Introduction Reference Manual June 2021 00809 0100 4976 22 Emerson com Rosemount L e g a ...

Page 23: ...R Source with the HART protocol RS 485 All versions Modbus protocol 1 5 6 Detector status The possible detector function statuses are listed in the table below Use HART or Modbus to see a more detailed fault analysis Table 1 7 Detector Statuses Status Description Normal Normal operation BIT Built in test being performed Warning Fire detected changed to Warning pre alarm state Alarm Fire detected c...

Page 24: ... via programmed function Default is non latching 4 The detector will remain in BIT Fault state until it has passed a successful built in test Note The outputs depend on the output configurations Optional latching Alarms are set as non latching by default However the detector includes a latched alarm output capability which operates according to the programmed function If selected upon detection of...

Page 25: ...se or disconnection in the electronic circuitry 0 20 mA level output Relays and heater operation Processor watch dog Software Memory Oscillator frequency Response to a fault indication If a failure is found the detector indicates it by Fault relay Opens in output configurations 1A 2A and 1R Closes in output configurations 3A and 2R 0 20 mA indicates fault 0 mA or 2 mA in output configurations 1A 2...

Page 26: ...continue to detect a fire Automatic built in test The detector automatically performs a built in test every fifteen minutes A successful built in test sequence does not activate any indicator All outputs of built in test results function as described in Table 1 9 and Table 1 10 and the built in test is automatically executed every one minute This continues until a successful built in test occurs w...

Page 27: ...ED Normal Output configurations 3A and 2R remain OPEN Normal Alarm relay Activated for three seconds only when the function Alarm BIT is set to YES Auxiliary relay For output configurations 1R and 2R is activated for three seconds only when the function Auxiliary BIT is set to YES 0 20 mA output Output configurations 1A 2A and 3A Initiates 20 mA only when the function Alarm BIT is set to YES Initi...

Page 28: ...Introduction Reference Manual June 2021 00809 0100 4976 28 Emerson com Rosemount L e g a c y ...

Page 29: ...st be grounded Ground the shield at the detector end Spacing and location The number of detectors and their locations in the protected area are determined by Size of the protected area Sensitivity of the detectors Obstructed lines of sight Cone of view of the detectors Environment Dust snow or rain can reduce the detector s sensitivity and require more maintenance activities The presence of high i...

Page 30: ...ype Confirm your product has the configuration options you ordered Check the detailed model number on the label and compare this information with the descriptions contained in Ordering information 2 3 Required tools The operator can install the detector using general purpose tools and equipment Table 2 1 lists the specific tools required to install the detector Table 2 1 Required Tools Tool Functi...

Page 31: ...such as EN 60079 14 1997 Only suitably trained personnel should inspect and maintain the detector in accordance with the applicable code of practice such as EN 60079 17 Only suitably trained personnel should repair the detector in accordance with the applicable code of practice such as EN 60079 19 The certification of this equipment relies upon the following materials used in its construction Encl...

Page 32: ...nted downwards When using the optional tilt mount use flexible conduits for the last portion connecting to the detector For installation in atmospheres as defined in group B of the National Fire Protection Agency NFPA 72E seal the conduit inlets When pulling the cables through the conduits ensure that they are not tangled or stressed Extend the cables about 12 in 30 cm beyond the detector location...

Page 33: ...t mount plate D Horizontal locking screw E Tilt mount F Vertical locking screw G Detector holding screw H Tilt mount holding plate I Conduit cable inlet J Detector assembly Reference Manual Installing the detector 00809 0100 4976 June 2021 Rosemount 975HR 33 L e g a c y ...

Page 34: ...2 2 Tilt Mount Assembly A Tilt holding plate B Tilt mount C Horizontal locking screw D Vertical locking screw E Detector holding plate Installing the detector Reference Manual June 2021 00809 0100 4976 34 Emerson com Rosemount L e g a c y ...

Page 35: ...ector with its conduit cable entries pointing downwards on the holding plate of the tilt mount Secure the detector with 5 16 in 18 UNC x 1 in screw to the tilt mount 4 Release the horizontal and vertical locking screws using the supplied 3 16 in hex key such that the detector can be rotated Point the detector towards the protected area and ensure the view of the area is unobstructed Secure the det...

Page 36: ... is now revealed 3 Remove the protective plug mounted on the detector conduit cable entry pull the wires through the detector inlet 4 Use a in 14 national pipe thread NPT explosion proof conduit connection or M25 x 1 5 flameproof gland to assemble the cable conduit to the detector 5 Connect the wires to the required terminals on the terminal board according to the wiring diagram See Figure 2 4 and...

Page 37: ...l earth terminal D Earth terminal E Detector holding screw F Conduit cable entry G See Table 2 2 H Alarm relay C I Alarm relay normally open J Fault relay C K Manual built in test BIT Reference Manual Installing the detector 00809 0100 4976 June 2021 Rosemount 975HR 37 L e g a c y ...

Page 38: ... of each terminal for all the output configurations Table 2 2 Rosemount 975HR Output Configurations Wire terminal number 1A default 2A 3A 1R 2R 1 24 Vdc 24 Vdc 24 Vdc 24 Vdc 24 Vdc 2 0 Vdc 0 Vdc 0 Vdc 0 Vdc 0 Vdc 3 Manual built in test Manual built in test Manual built in test Manual built in test Manual built in test 4 Fault relay normally clsed N C Fault relay N C Fault relay normally open N O F...

Page 39: ... activate another external device or it may provide a warning signal depending on the function configuration 2 8 Configure the detector You can reprogram the function setup using the RS 485 connection or using the HART protocol as follows USB RS 485 harness kit PN 00975 9000 0011 The USB RS 485 harness kit with RS 485 USB converter used with the Rosemount host software enables you to connect to an...

Page 40: ...ector then evaluates the condition for three seconds If the alarm level is still present the detector activates the alarm outputs If this condition no longer exists the detector returns to its standby state The alarm delay option affects the output relays and the 0 20 mA output The LEDs and outputs indicate warning levels during the delay time only if the fire condition exists 2 8 3 Address setup ...

Page 41: ...tivate the auxiliary relay 1 Only available in output configurations 1R and 2R 2 8 5 Heated optics To configure optical window heating select one of the modes listed below OFF Optical window surface heating does not operate ON Optical window surface heating operates continuously AUTO Optical window surface heating operates according to temperature change Specify the start temperature below which t...

Page 42: ...Installing the detector Reference Manual June 2021 00809 0100 4976 42 Emerson com Rosemount L e g a c y ...

Page 43: ...e default non latching alarm mode Only perform a reset when the latching alarm option has been programmed To reset the detector when it is in a Latched Alarm state do one of the following Disconnect power terminal number 1 or terminal number 2 Initiate a manual built in test 3 2 Safety precautions After powering up the detector requires almost no attention in order to function properly but note th...

Page 44: ...est No In output configurations 1A 2A and 3A the auxiliary relay is not available This function is not used Heated optics Auto Heat on 41 F 5 C The detector starts heating the window for any temperature below this value In order to change the default function use USB RS 485 harness kit PN 00975 9000 001 HART protocol Refer to the Rosemount 975 Flame Detector HART Communication Manual 00809 0200 49...

Page 45: ...condition The flame simulator exposes the detector to radiation at the required detection level As a result the detector generates a fire alarm signal See Flame simulator for more information NOTICE If the detector is exposed to a flame simulator the alarm and accessory relays and 0 20 mA are activated during the simulation Therefore disconnect automatic extinguishing systems or any external devic...

Page 46: ... mA Alarm relay Activated For a few seconds and then returns to Normal Auxiliary relay Activated For a few seconds and then returns to Normal Fault relay Remains active during the test LED Red steady The detector is now ready for operation Operating the detector Reference Manual June 2021 00809 0100 4976 46 Emerson com Rosemount L e g a c y ...

Page 47: ...ns depends upon the local environmental conditions and specific applications The fire detection system designer will give his or her recommendations To clean the detector viewing window and reflector Procedure 1 Disconnect power to the detector before proceeding with any maintenance including window lens cleaning 2 Use water and detergent and then rinse the viewing window with clean water 3 Where ...

Page 48: ... distributer for service include a copy of the maintenance records 4 2 Troubleshooting This section is intended to be a guide to correct problems that may happen during normal operation 4 2 1 Fault relay at N O LEDs off 0 20 mA at 0 mA Potential cause No power to the unit Recommended actions 1 Check that the correct power is sent to the detector 2 Check power polarity 3 Check wiring in the detecto...

Page 49: ...ean detector window 2 Re power the detector 3 Replace the detector 4 2 4 Red LED constantly on Potential cause If no fire exists the detector alarm may be latched Recommended action Reset the detector 4 2 5 Alarm relay at on 0 20 mA at 20 mA Potential cause Alarm condition Recommended actions 1 Check cause of alarm 2 If no alarm re power the detector 3 Send the detector back for repairs Reference ...

Page 50: ...Maintenance and troubleshooting Reference Manual June 2021 00809 0100 4976 50 Emerson com Rosemount L e g a c y ...

Page 51: ...onds Adjustable time delay Up to 30 seconds Sensitivity ranges Two ranges for 1 ft 2 0 1 m2 n heptane pan fire from 50 ft 15 m to 215 ft 65 m Fields of view Gasoline horizontal 80 vertical 80 Hydrogen horizontal 70 vertical 80 Built in test BIT Automatic and manual 1 30 in 0 75 m high 10 in 0 25 m wide plume fire 2 20 in 0 5 m high 8 in 0 2 m wide plume fire A 2 Electrical specifications Operating...

Page 52: ...face There are five output configurations These configurations must be defined at the factory per the customer order and cannot be changed at the customer facility See General instructions for electrical wiring for the wiring terminal diagrams for each option Unless otherwise specified the default is output configuration 1A The wiring arrangement is identified on the detector by the part number se...

Page 53: ... a fault condition or low voltage situation occurs 0 20 mA current output The 0 20 mA can be Sink or Source according to the output configuration see General instructions for electrical wiring The maximum permitted load resistance is 600 Ω Table A 4 20 mA Current Output State Output Fault 0 1 mA Built in test BIT fault 2 mA 10 Normal 4 mA 10 Warning 16 mA 5 Alarm 20 mA 5 HART protocol The HART pro...

Page 54: ...e 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 ...

Page 55: ...on The Rosemount 975 detector conforms to DNVGL CG 0339 class B Table A 5 Electromagnetic Compatibility This product is in conformance with EMC per EN50270 Level per Radiated immunity EN61000 4 3 Conducted immunity EN61000 4 6 Electrostatic discharge ESD EN61000 4 2 Magnetic field EN61000 4 8 Burst EN61000 4 4 Surge EN61000 4 5 Radiated emission EN550022 Conducted emission EN550022 CAUTION To full...

Page 56: ...Specifications and reference data Reference Manual June 2021 00809 0100 4976 56 Emerson com Rosemount L e g a c y ...

Page 57: ... 1 94 2 28 0 27 0 88 2 Use Table B 2 to select wire gauge for power supply wires Do not connect any circuit or load to detectors supply inputs Select number of detectors connected in one circuit Select wiring length per installation requirements Refer to power supply range for voltage extreme applied Table B 2 Wiring Length in Meters Feet Number of detectors Recommended wire diameter AWG Power sup...

Page 58: ... see Table B 2 V Voltage drop on the wire Calculate the voltage drop on the wire as follows 20 V Minimum required voltage of the power supply 0 2 A is the maximum power consumption of the detector For example If N 1 1 detector in loop L 1 000 m wire size 1 5 mm2 see Table B 1 the resistance per 100 m for 1 5 mm2 is 1 4 Ω You calculate the voltage drop in the wire as follows The minimum voltage of ...

Page 59: ... A See table B Alarm relay C C Ground D Alarm relay normally open N O E Fault relay C Output configuration Terminals 5 8 9 1A Fault relay normally closed N C 0 20 mA sink 0 20 mA sink 2A Fault relay N C Alarm relay N C 0 20 mA source Reference Manual Wiring instructions 00809 0100 4976 June 2021 Rosemount 975HR 59 L e g a c y ...

Page 60: ...2R Fault relay N O Auxiliary relay N O Auxiliary relay N O Figure B 2 Typical Wiring for Four Wire Controllers Using Output Configuration 1A or 2A A Controller B First detector C Second detector D Last detector E Power supply F Alarm loop G End of line EOL Wiring instructions Reference Manual June 2021 00809 0100 4976 60 Emerson com Rosemount L e g a c y ...

Page 61: ...0 mA Output Configuration 1A Sink 4 Wire Default A Detector B Controller C Input power 18 32 Vdc D Return E 0 20 mA meter Reference Manual Wiring instructions 00809 0100 4976 June 2021 Rosemount 975HR 61 L e g a c y ...

Page 62: ...put Configuration 1A Converted to Source Three Wire A Detector B Controller C Input power 18 32 Vdc D Return E 0 20 mA meter Wiring instructions Reference Manual June 2021 00809 0100 4976 62 Emerson com Rosemount L e g a c y ...

Page 63: ... Output Configuration 1A Non Isolated Sink Three Wire A Detector B Controller C Input power 18 32 Vdc D Return E 0 20 mA meter Reference Manual Wiring instructions 00809 0100 4976 June 2021 Rosemount 975HR 63 L e g a c y ...

Page 64: ...vailable with HART Protocol A Detector B Controller C Input power 18 32 Vdc D Return E 0 20 mA meter NOTICE There are no 0 20 mA outputs in output configurations 1R and 2R Wiring instructions Reference Manual June 2021 00809 0100 4976 64 Emerson com Rosemount L e g a c y ...

Page 65: ...ctors can be much larger 32 detectors for each repeater up to 247 on the same four wires When using the RS 485 network you can read each detector status Fault Warning and Alarm and to initiate a built in test to each detector individually For more details consult Rosemount Figure C 1 RS 485 Networking A Controller B Detector C Power supply D RS 485 computer port Reference Manual RS 485 communicati...

Page 66: ...RS 485 communication network Reference Manual June 2021 00809 0100 4976 66 Emerson com Rosemount L e g a c y ...

Page 67: ...ly for use with Rosemount flame detectors The flame simulator emits infrared radiation in a unique sequential pattern corresponding to and recognizable by the detector as fire This allows the detectors to be tested under simulated fire conditions without the associated risks of an open flame Figure D 1 Flame Simulator Reference Manual Accessories 00809 0100 4976 June 2021 Rosemount 975HR 67 L e g ...

Page 68: ...ther reason in a hazardous area CAUTION The following test simulates a real fire condition and may activate the extinguishing system of other alarms If you don t want this to happen disconnect inhibit other alarms before the test and reconnect after the simulation Procedure 1 Make sure that you are at the correct distance from the detector according to the type of detector and the detector sensiti...

Page 69: ...range NOTICE Keep the flame simulator in a safe place when not in use D 1 5 Charge the battery The flame simulator uses lithium ion batteries as a rechargeable power source When the batteries are fully charged the simulator operates for at least 1 000 times without having to be recharged The simulator will not operate when the voltage from the batteries is lower than the required operational level...

Page 70: ...g screw D 1 6 Replace the battery NOTICE The item letters shown in this procedure can be found in Figure D 2 Procedure 1 Place the flame simulator on a table in a safe area not exceeding 104 F 40 C 2 Release the locking screw 3 Unscrew the battery back cover D counter clockwise 4 Unscrew the locking disk C clockwise 5 Pull out the battery from the flame simulator 6 Insert the new battery pack in t...

Page 71: ...ib op is tb IIIC T135 C Db 4 to 122 F 20 to 50 C Water and dust tight IP65 Electromagnetic interference EMI compatibility See Table D 3 and Table D 4 Table D 3 Immunity Tests Title Basic standard Level to be tested Electrostatic discharge ESD IEC 61000 4 2 6 kv 8 kv contact air Radiated electromagnetic field IEC 61000 4 3 20 V m 80 MHz to 1 GHz 10 V m 1 4 GHz to 2 GHz 3 V m 2 0 GHz to 2 7 GHz Cond...

Page 72: ...verage Figure D 3 Tilt Mount D 3 Duct mount The duct mount limits the cone of vision of the installed detector to 70 degrees horizontal and vertical For more instructions refer to the Duct Mount Manual 00809 0600 4975 Accessories Reference Manual June 2021 00809 0100 4976 72 Emerson com Rosemount L e g a c y ...

Page 73: ...00975 9000 0003 The weather cover protects the detector from different weather conditions such as snow and rain Figure D 4 Weather Cover Reference Manual Accessories 00809 0100 4976 June 2021 Rosemount 975HR 73 L e g a c y ...

Page 74: ...ugh environmental conditions where they may be exposed to oil vapors sand dust and other particulate matter The temperature of the air supply to the air shield should not exceed 140 F 60 C at any time Air pressure source clean dry and oil free air Inlet pressure 30 45 psi 2 3 bar maximum 100 psi 7 bar Cubic feet per minute 1 5 2 8 Tube outside diameter in national pipe thread NPT 6 mm Connecting a...

Page 75: ...nctional check of the detector every 365 days HFT 0 PFD 5 1 x 10 4 5 1 percent of SIL 2 if only alarm relay is used for alerting PFD 5 6 x 10 4 5 6 percent of SIL 2 if 0 20 mA interface is used as alarm PFH 1 6 x 10 7 1 h 16 4 percent of SIL 2 for 0 20 mA application SFF 95 percent fulfills the conditions of EN 61508 for SIL 2 E 2 Guidelines for configuring installing operating and service The ale...

Page 76: ...and mode E 2 3 Using the alarm relay contact for alerting The following parameters shall be set Automatic built in test On Connected to normally closed N C contact of alarm relay terminals Connected to fault relay terminals The relay contacts alarm and faulty relay must be protected with a fuse rated at 0 6 of the nominal specified relay contact current The maximum contact rating that is allowed p...

Page 77: ...3 The HART and the RS 485 interfaces must not be used for the transmission of the safety related data Reference Manual SIL 2 features 00809 0100 4976 June 2021 Rosemount 975HR 77 L e g a c y ...

Page 78: ...SIL 2 features Reference Manual June 2021 00809 0100 4976 78 Emerson com Rosemount L e g a c y ...

Page 79: ...g on the application When the resistor is assembled the rear part can be used as Ex d only To meet the allowed power consumption the total resistance should be higher than 1 5 KΩ Figure F 1 Rosemount 975HR Flame Detector A Terminal number 5 B Terminal number 6 C Rosemount 975HR flame detector D End of line resistor Reference Manual End of line resistor 00809 0100 4976 June 2021 Rosemount 975HR 79 ...

Page 80: ...ights reserved Emerson Terms and Conditions of Sale are available upon request The Emerson logo is a trademark and service mark of Emerson Electric Co Rosemount is a mark of one of the Emerson family of companies All other marks are the property of their respective owners L e g a c y ...

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