Emerson Rosemount 8712EM Quick Start Manual Download | Manualshive

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External power

Analog output wiring, external power

Figure 5-14:

A. Power supply

•

(+) to Terminal #7

•

(–) to Terminal #8

Note

Terminal polarity for the analog output is reversed between internally and
externally powered.

Quick Start Guide

November 2017

28

Rosemount 8712EM Transmitter with HART Protocol

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Summary of Contents for Rosemount 8712EM

Page 1: ...Quick Start Guide 00825 0100 4445 Rev AB November 2017 Rosemount 8712EM Transmitter with HART Protocol ...

Page 2: ... atmosphere disconnect power before servicing circuits Explosion hazard Do not disconnect equipment when a flammable or combustible atmosphere is present Do not connect a Rosemount Transmitter to a non Rosemount sensor when installed in an Ex environment explosive atmosphere hazardous area or classified area Follow national local and plant standards to properly earth ground the transmitter and sen...

Page 3: ...unt 8712EM Transmitter with HART Protocol Reference Manual All user documentation can be found at www emerson com For more contact information see Section 2 2 2 1 Return policy Emerson procedures must be followed when returning equipment These procedures ensure legal compliance with government transportation agencies and help provide a safe working environment for Emerson employees Failure to foll...

Page 4: ...1 India 800 440 1468 Argentina 54 11 4837 7000 Germany 0800 182 5347 Pakistan 888 550 2682 Brazil 55 15 3413 8000 Italy 8008 77334 China 86 21 2892 9000 Venezuela 58 26 1731 3446 Central East ern 41 0 41 7686 111 Japan 81 3 5769 6803 Russia CIS 7 495 981 9811 South Korea 82 2 3438 4600 Egypt 0800 000 0015 Singapore 65 6 777 8211 Oman 800 70101 Thailand 001 800 441 6426 Qatar 431 0044 Malaysia 800 ...

Page 5: ...te input discrete output HART multidrop configuration Hardware switches The transmitter may have up to four user selectable hardware switches These switches set the alarm mode internal external analog power internal external pulse power and transmitter security The standard configuration for these switches when shipped from the factory is as follows Hardware switch default settings Table 3 1 Setti...

Page 6: ...nd configuration procedures Mechanical considerations The mounting site for the transmitter should provide enough room for secure mounting easy access to conduit entries full opening of the transmitter covers and easy readability of the Local Operator Interface LOI screen if equipped Quick Start Guide November 2017 6 Rosemount 8712EM Transmitter with HART Protocol ...

Page 7: ... Conduit entry 1 2 14 NPT 4 places B Ground lug C LOI keypad cover D Lower cover opens for electrical connections Note Dimensions are in inches Millimeters Electrical considerations Before making any electrical connections to the transmitter consider national local and plant electrical installation requirements Be sure to have November 2017 Quick Start Guide Quick Start Guide 7 ...

Page 8: ...ut circuit Internally Powered Active Outputs up to 25mA 24VDC 600mW Externally Powered Passive Input up to 25mA 30VDC 750mW Um 250V Coil excitation output 500mA 40V max 9W max Environmental considerations To ensure maximum transmitter life avoid extreme temperatures and excessive vibration Typical problem areas include the following Tropical or desert installations in direct sunlight Outdoor insta...

Page 9: ... surface Mounting bracket Figure 4 1 A B C A U bolt B Saddle clamp C Fasteners 4 1 Pipe mounting 1 Attach the saddle clamp to the pipe using the U bolt mounting hardware 2 Attach the transmitter to the saddle clamp assembly with appropriate fasteners November 2017 Quick Start Guide Quick Start Guide 9 ...

Page 10: ...mounting location using customer supplied mounting screws The installation of the transmitter shall be rated for four 4 times the weight of the transmitter or 44lbs 20kgs Quick Start Guide November 2017 10 Rosemount 8712EM Transmitter with HART Protocol ...

Page 11: ...reference manual For installations with non intrinsically safe electrode circuit or when using the combination cable a single dedicated conduit run for the coil drive and electrode cable between the sensor and the remote transmitter may be acceptable Removal of the barriers for intrinsic safety isolation is permitted for non intrinsically safe electrode installations Bundled cables from other equi...

Page 12: ... electrode cable Remote cables can be ordered directly using the kit numbers shown in Table 5 1 Table 5 2 and Table 5 3 Equivalent Alpha cable part numbers are also provided as an alternative To order cable specify length as quantity desired Equal length of component cables is required Examples 25 feet Qty 25 08732 0065 0001 25 meters Qty 25 08732 0065 0002 Quick Start Guide November 2017 12 Rosem...

Page 13: ...ndividual cable Alpha p n 08732 0065 1001 feet Kit Component Ca bles Ext Temp in cludes Coil and Elec trode Coil Electrode Not available Not available 08732 0065 1002 meters Kit Component Ca bles Ext Temp in cludes Coil and Elec trode Coil Electrode Not available Not available 08732 0065 1003 feet Kit Component Ca bles Ext Temp in cludes Coil and I S Electrode Coil Intrinsically Safe Blue Electrod...

Page 14: ...e limited to less than 500 feet 152 m Consult factory for length between 500 1000 feet 152 304 m Equal length cable is required for each For installations using the combination coil drive electrode cable see Figure 5 3 Combination cable lengths should be limited to less than 330 feet 100 m Quick Start Guide November 2017 14 Rosemount 8712EM Transmitter with HART Protocol ...

Page 15: ... A Coil drive B Electrode C Twisted stranded insulated 14 AWG conductors D Drain E Overlapping foil shield F Outer jacket G Twisted stranded insulated 20 AWG conductors 1 Red 2 Blue 3 Drain 17 Black 18 Yellow 19 White November 2017 Quick Start Guide Quick Start Guide 15 ...

Page 16: ...ite Cable preparation Prepare the ends of the coil drive and electrode cables as shown in Figure 5 4 Remove only enough insulation so that the exposed conductor fits completely under the terminal connection Best practice is to limit the unshielded length D of each conductor to less than one inch Excessive Quick Start Guide November 2017 16 Rosemount 8712EM Transmitter with HART Protocol ...

Page 17: ...to the transmitter housing or other terminal connections Excessive unshielded length or failure to connect cable shields properly may also expose the unit to electrical noise resulting in an unstable meter reading November 2017 Quick Start Guide Quick Start Guide 17 ...

Page 18: ...ss remote junction box terminals 1 and 2 40V WARNING Explosion hazard Electrodes exposed to process Use only compatible transmitter and approved installation practices For process temperatures greater than 284 F 140 C use a wire rated for 257 F 125 C Quick Start Guide November 2017 18 Rosemount 8712EM Transmitter with HART Protocol ...

Page 19: ...Transmitter Sensor transmitter wiring Table 5 4 Wire color Sensor terminal Transmitter terminal Red 1 1 Blue 2 2 Shield 3 or Float 3 Black 17 17 Yellow 18 18 White 19 19 Note For hazardous locations refer to the product reference manual November 2017 Quick Start Guide Quick Start Guide 19 ...

Page 20: ...5 4 Wiring diagrams Wiring 8712EM using component cable Figure 5 6 Quick Start Guide November 2017 20 Rosemount 8712EM Transmitter with HART Protocol ...

Page 21: ...Wiring 8712EM using combination cable Figure 5 7 November 2017 Quick Start Guide Quick Start Guide 21 ...

Page 22: ...Coil Shield 5 Pulse Pulse 6 Pulse Pulse 7 1 Analog HART Analog HART 8 1 Analog HART Analog HART 9 2 Discrete In Out 2 Discrete In Out 2 10 2 Discrete In Out 2 Discrete In Out 2 11 2 Discrete In Out 1 Discrete In Out 1 12 2 Discrete In Out 1 Discrete In Out 1 17 Electrode Reference Electrode Reference 18 Electrode Negative Electrode Negative 19 Electrode Positive Electrode Positive N AC Neutral L2 ...

Page 23: ...ents for the supply voltage If installing in a hazardous location verify that the meter has the appropriate hazardous area approval Each meter has a hazardous area approval tag attached to the side of the transmitter housing AC power supply requirements Units powered by 90 250VAC have the following power requirements Peak inrush is 35 7A at 250VAC supply lasting approximately 1ms Inrush for other ...

Page 24: ... state Low power DC units may draw up to 0 25A of current steady state Peak inrush is 42A at 42VDC supply lasting approximately 1ms Inrush for other supply voltages can be estimated with Inrush Amps Supply Volts 1 0 DC current requirements Figure 5 11 12 0 2 0 3 0 4 0 5 0 6 0 7 0 9 1 0 1 1 1 2 0 8 17 22 27 B 32 37 42 A A Supply current amps B Power supply VDC Quick Start Guide November 2017 24 Ros...

Page 25: ...s of the transmitter with the device under load Electrical disconnect requirements Connect the device through an external disconnect or circuit breaker per national and local electrical code Installation category The installation category for the transmitter is OVERVOLTAGE CAT II Overcurrent protection The transmitter requires overcurrent protection of the supply lines Fuse rating and compatible f...

Page 26: ...or is tight against the housing Metal to metal contact of the screw bosses is required to ensure a proper seal Note Application of excessive torque may strip the threads or break the screw 3 Verify the lower door is secure 5 7 Analog output The analog output signal is a 4 20mA current loop Depending on the IS output option the loop can be powered internally or externally via a hardware switch loca...

Page 27: ...ct reference manual Internal Power Analog output wiring internal power Figure 5 13 A B A 4 20 mA to Terminal 7 B 4 20 mA to Terminal 8 Note Terminal polarity for the analog output is reversed between internally and externally powered November 2017 Quick Start Guide Quick Start Guide 27 ...

Page 28: ...l power Figure 5 14 A Power supply to Terminal 7 to Terminal 8 Note Terminal polarity for the analog output is reversed between internally and externally powered Quick Start Guide November 2017 28 Rosemount 8712EM Transmitter with HART Protocol ...

Page 29: ...ions Figure 5 15 600 0 10 8 30 C B A A Load ohms B Power supply volts C Operating region Rmax 31 25 Vps 10 8 Vps power supply voltage volts Rmax maximum loop resistance ohms November 2017 Quick Start Guide Quick Start Guide 29 ...

Page 30: ...ll be displayed Units should be selected to meet your particular metering needs Line size The line size sensor size must be set to match the actual sensor connected to the transmitter The size must be specified in inches Upper range value URV The URV sets the 20 mA point for the analog output This value is typically set to full scale flow The units that appear will be the same as those selected un...

Page 31: ...ay To deactivate the display lock hold the UP arrow for three seconds and follow the on screen instructions Once deactivated the lock symbol will no longer appear in the lower right hand corner of the display 6 3 Field Communicator interface Use the menu paths to configure basic setup of the transmitter using a field communicator Basic setup menu paths Table 6 1 Function Menu path Basic Setup Conf...

Page 32: ...epublic of Singapore T 65 6777 8211 F 65 6770 8003 Emerson Automation Solutions United Kingdom Emerson Process Management Limited Horsfield Way Bredbury Industrial Estate Stockport SK6 2SU U K T 44 0870 240 1978 F 44 0800 966 181 Emerson Automation Solutions Japan 1 2 5 Higashi Shinagawa Shinagawa ku Tokyo 140 0002 Japan T 81 3 5769 6803 F 81 3 5769 6844 2017 Rosemount Inc All rights reserved The ...

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