Emerson 848T manual

www .rosemount.com Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T High Density T emperature T ransmitter with F OUNDATION ™ fieldbus Device Revision 7[...]

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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T www .rosemount.com Rosemount 848T High Density T emperature T ransmitter with F OUNDATION fieldbus NOTICE Read this manual before working with t he produ ct. For personal and system safety , and for optimum product performance, make sure to thoroughly understand the contents befo[...]

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Reference Manual 00809-0100- 4697, Rev EA October 2011 TOC -1 Rosemount 848T SECTION 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Overview . . . . . . . . . . . . . . . . . . . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T TOC -2 SECTION 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Foundation fieldbus Information . [...]

Reference Manua l 00809-0100-46 97, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 1- 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2 Service Support . . . . . . . . . . . . . . . . [...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 1-2 OVERVIEW T ransmitter The Rosemount 848T is optimal fo r process t emperatur e measur ement because of its ability to simultane ously measure eight separate and independent temp erature points with one tr ansmitter . Multiple temperature sensor types may be connected to each [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 1-3 Rosemount 848T SERVICE SUPPORT T o expedite the return process in North America, call the Emerson Process Management Nationa l Response Center toll-free at 800-654-7768 . This center , available 24 hours a day , will as sist with any neede d information or materials. The center will ask for[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 1-4[...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 2 Inst allation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 2-1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 2-1 Wiring . . . . . . . . . . . . . . . . . . . . .[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-2 Mounting to a DIN Rai l Without an Enclosure T o mount the 848T to a DIN rail without an enclosure, follow these step s: 1. Pull up the DIN rail mounting clip located on the top back side of the transmitter . 2. Hinge the DIN rail into the slot s on the bottom of the transmit[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 2-3 Rosemount 848T Mounting to a 2-in. Pipe S tand Use the optional mountin g bracket (opt ion code B6) to mount the 848T to a 2-in. pipe sta nd when using a junction box. Aluminum/Plastic Junc tion Box (styles JA and JP) St ainless Steel Junction Box (style JS) Front View Side View Front View [...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-4 WIRING If the sensor is inst alled in a high-volt age en vironment and a fault cond ition or installation error occu rs, the sens or lead s an d tra ns m itte r te rm in als co uld carry lethal volta ges. Use extre me caution when making contact with th e leads and terminals.[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 2-5 Rosemount 848T RTD or Ohm Inputs V arious RT D configurations, includ ing 2- wire an d 3-wire a re used in indu strial applications. If the transm itter is mounted re motely from a 3-wire RTD, it will operate within specifications, without r eca libration, for lead wire resist ances of up t[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-6 Figure 2-5. 848 T Analog Input Wiring Diagram Figure 2-6. 848T Analog Connector Power Supply Analog Input Connectors Analog T ransmitters HART Channel A 250 ohm resistor in the loop when switched to the le ft Sp ace available for identification of inputs HART Channel B[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 2-7 Rosemount 848T Power Supply Connections The transmitter requires between 9 and 32 VDC to operate and provi de complete functionality . The DC power supply should provide power with less than 2% ripple . A fieldbus segm ent requires a power condition er to isolate the power supply filter and[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-8 GROUNDING The 848T transmitter provides input/output isolation up to 62 0 V rms. NOTE Neither conductor of the fieldbus se gme nt can be grounded. Grounding out one of the signal wires will shut down the entire fieldbus segment. Shielded Wire Each process installatio n has di[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 2-9 Rosemount 848T Grounded Thermocouple Input s 1. Ground sensor wiring shield (s) at the senso r . 2. Ensure that the sensor wiring and si gnal wiring shields are electrically isolated from the tr ansmitter enclosure. 3. Do not connect the signal wiring sh ield to the sensor wiring shield(s).[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-10 SWITCHES Figure 2-8. Switch Location on the Rosemoun t 84 8 T Security After configur ing the transmitter , the data can be pr otected from unwarranted changes. Each 848T is equipped with a se curity switch that can be po sitioned “ON” to prevent the accidental or delib [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 2-1 1 Rosemount 848T T AGGING Commissioning T ag The 848T has been supplied with a removable commissioning ta g that contains bo th the Device ID (the unique code that identifies a p articular device in the absence of a devic e tag) and a space to rec or d the de vice tag (the operational ident[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-12 INST ALLATION Using Cable Glands Use the following steps to insta ll the 848T with Cable Glands: 1. Remove the junction box cover by unscre wing the four cover screws. 2. Run the sens or and power/s ignal wires thr ough the appr opriate cable glands using the pre-inst alled [...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 3 Configuration Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 3-1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 3-2 Common Configurations for High Density Applications[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-2 CONFIGURATION St andard Each F OU NDATION fieldbus configuration tool or host system has a differ en t way of displaying and performing configurations. Some will use Device Descriptions (DDs) and DD Methods to make confi guration and displaying o f data consistent acro ss hos[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-3 Rosemount 848T Alarms Use the following steps to configur e the alarms, which are located in the Resource Function Block. 1. Set the resource block to OOS. 2. Set WRITE_PRI to the appropriate alarm level (WRITE_PRI has a selectable range of priorities from 0 to 15, see “Alarm Prior i ty L[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-4 6. Set the De adband from 0 to 90 %. This thre shold is used to clear th e PV status. 7. Set S tatus Priority . This determi nes wh at happens wh en the specific limit has been exceeded. No Alert - Ignores limit settings. Advisory - Sets Advisory Plant W eb Alert, bu t does n[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-5 Rosemount 848T Monitoring Application with a Single Se lection Example: Aver age exhaust temperature of gas and tu rbine where there is a single alarm level for all inputs. 1. Link the MAI outputs to the ISEL inputs. 2. Place the Multiple Analog Input (MAI) function block in OOS mode (set M[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-6 Interfacing Analog T ransmitters to F OUNDATION fieldbus T ransducer Block Configurat io n Use the sensor configuration method to set th e sensor type to m V – 2-wire for the applicab le transducer block or fo llow these steps. 1. Set the MODE_BLK .T ARGET to OOS mode, or s[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-7 Rosemount 848T BLOCK CONFIGURATION Resource Block The resource block defines the physical resources of the device including type of measurement, memory , etc. The resource block also defines functionality , such as shed times, that is common across multiple block s. The block has no linkabl[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-8 28 FA U LT _ S TA T E Condition set by loss of communication to an o utput block, fault promoted to an output block or physical contact. When F AIL_ SAFE condition is set, then out put function blocks will perform their F AIL_SAFE actions. 29 SET_FST A TE Allows the F AIL_SAF[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-9 Rosemount 848T 60 DEFINE_WRITE_LOCK Allows the o perator to select how WRIT E_LOCK behaves. The init ia l value is “lock everything”. If the value is set to “lock only physical device” then the re source and transducer blocks of the device will be locked but changes to function bl o[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-10 Block Errors T able 3-3 lists conditions reporte d in the BLOCK_ ERR parameter . T able 3-3. BLOCK_ERR Conditions . Modes The resource block supports two modes of ope ra tion as defined by the MODE_BLK para meter: Automatic (Aut o) The block is processing its no rmal backgro[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-1 1 Rosemount 848T Out of Service (OOS) The block is not processing it s tasks. When the resource block is in OOS, all blocks within the re source (device) are forced into OOS. The BLOCK_ERR parameter shows Out of Se rvice. In this mode, changes can be made to all configurable p arameters. Th[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-12 T able 3-5. Failure Alarms F AILED_MASK This parameter will mask any of th e failed conditions listed in F AIL ED_ENABLED. A bit on means that th e condition is m asked out from alarming and will not be reported. FA I L E D _ P R I Designates the alerting priority of the F A[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-13 Rosemount 848T T able 3-6. Maintenance Alarms/Priority Alarm MAINT_MASK The MAINT_MASK parameter will mask any of th e failed conditions listed in MAINT_ENABLED. A bit on means th at the condition is masked out from alarming and will not be reported. MAINT_PRI MAINT_PRI designates th e ala[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-14 ADVISE_MASK The ADVISE_MASK parameter wi ll mask any of the failed conditions listed in ADVISE_ENABLED. A bit on means t he condition is masked out from alarming and will not be reported. ADVISE_PRI ADVISE_PRI designates the alarming pr io rity of the A DVISE_ALM, see T able[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-15 Rosemount 848T NOTE If status is set up to flag failure/warnin g you will see associated sensor degraded or failur e alert. T ransducer Blocks The transducer block allows the user to view a nd manage the channel information. Ther e is one T ra nsducer Bloc k for the eight sensor s that con[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-16 T ransducer Block Channel Definitions The 848T support s multiple sensor input s. Each input has a channel assigned to it allowing an AI or MAI Function Bl ocks to be linked to that input. The channels for the 848T are as follows: T able 3-8. Channel Definitions for the 848T[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-17 Rosemount 848T T a ble 3-9. Blo ck/T ransduc er Error T ransducer Block Modes The transducer block suppo rts two modes of operation as defined by th e MODE_BLK para meter: Automatic (Aut o) The block output s reflect the analog input measurement. Out of Service (OOS) The block is not proce[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-18 12 COLLECTION_DIRECTORY A directory that specifies the number , starting indices, and DD Item ID’s of the data collections in each transducer block. 13 SENSOR_1_CONFIG Sensor Configuration Parameters. Please see t ables below for a list of sub-parameters that pertain to Se[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-19 Rosemount 848T Changing the Sensor Configura tion in the T ransducer Block If the F OUNDA TION fieldbus conf iguration tool or host system does not suppor t the use of DD methods for device configuration, th e following steps illustrate how to change the se nsor configuration in the transd[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-20 T ransducer Block Sub-Parameter T ables T able 3-1 1. XD_ERROR Sub-Paramete r S tructure T a ble 3-12. SENSOR _CONFIG Sub-Paramete r S tructure XD ERROR Description 0 No Error 17 General Error An error has occurred that could not be classified as one of the errors listed bel[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-21 Rosemount 848T T able 3-13. SENSOR_ST A TUS Sub-Paramete r S tructure T able 3-14. SENSOR_CAL Sub-Paramete r S tructure T able 3-15. CAL_ST A TUS St r u c t u r e T able 3-16. Transduce r S tatus Sub-Paramete r S tructure Sensor Status T able 0x00 Active 0x01 Out of Service 0x02 Inactive 0[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-22 T able 3-17. DUAL_SENSOR CONFIG Sub-Parameter St r u c t u r e T able 3-18. DUAL_SENSOR_ ST A TUS Sub-Parameter St r u c t u r e T able 3-19. V alidation V alue Sub-Paramete r S tructure DUAL SENSOR CON FIG STRUCTURE Parame ter Description DUAL_SENSOR_MODE Disables or enable[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 3-23 Rosemount 848T T able 3-20. V alidation Config Sub-Paramete r S tructure Sensor Calibration in the Sensor T ransducer Block If the F OUNDATION fieldbus configuration tool or host system d oes not su pport the use of DD methods for device configuration, th e following steps illustrate how t[...]

Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-24 1. Under SENSOR_CALIB, the SENSO R_NUMBER to the number of the sensor to c alibrate. 2. Set CALIB_UNIT to calibration unit. 3. Set CALIB_METHOD to User T rim (seeT able 3-8 on page 3-16 for valid values). 4. Set the input value of the sensor simulator to be within the range [...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 4-1 Foundation fieldbus Information . . . . . . . . . . . . . . . . . . . . p age 4-1 Hardware Maintenance . . . . . . . . . . . . . . . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T 4-2 T able 4-1. Block Diagram for the Rosemount 848T Commissioning (Addressing) T o be able to setup, configure, and ha ve it communicate with other devices on a segment, a device must be assigned a permanent address. Unless requested otherwise, it is assigned a temporary address[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 4-3 Rosemount 848T HARDWARE MAINTENANCE The 848T has no moving p arts and requires a min imal amount of scheduled maintenance. If a malfunction is susp ected, check for an extern al cause before performing the diagn ostics presented below . Sensor Check T o determine whether th e sensor is caus[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T 4-4 T ROUBLESHOOTING F OUNDATION fieldbus Resource Block T ransducer Block T roubleshooting Symptom Possible Cause Corrective Action Device does not show up in the liv e list Network configuration parameters are incorrect Set the network parameters of the LAS (host system) accord[...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix A Reference Dat a Functional Specificat ions . . . . . . . . . . . . . . . . . . . . . . . . . page A-1 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . p age A-3 Performan c e Specific at io ns . . . . . . . . . . . . . . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-2 T ran sient Protect ion The transient protecto r (option code T1) helps to prevent dam age to the transmitter from transie nts induced on the loop wiring by lightn ing, welding, heavy electrical equipment, or switch ge ars. This option is inst alled at the factory for the Ros[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-3 Rosemount 848T PHYSICAL SPECIFICATIONS Mounting The Rosemount 848T can be moun ted directly onto a DIN rail or it can be ordered with an optional junctio n box. When using the optional junction box, the transmitter can be mo unted onto a p anel or a 2-in. pi pe st and (with option code B6).[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-4 FUNCTION BLOCKS Analog Input (AI) • Processes the measurement and makes it available on the fieldbus segment. • Allows filtering, alarming, and enginee ring unit changes. Input Selector (ISEL) • Used to select between input s and generate an output using sp ecific selec[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-5 Rosemount 848T Accuracy Differential Co nfiguration Notes Differential capability exist s between any two se nsor types. For all differential configurations, the input range is X to Y where Accuracy for Differential Configurations: If sensor types are similar (for example, both RTDs or both[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-6 Analog Sensors 4–20mA T wo types of 4–20 mA sensors are compatible with the Rosemount 848T . These types must be orde red with the S002 option code comp lete with an analog connector kit. The alarm levels, a ccuracy for each type are listed in T able 2. T able 2. Analog S[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-7 Rosemount 848T Ambient T emperature Effect T ransmitter may b e installed in locations wher e the ambient temperat ure is between -40 and 85 ° C (-40 and 185 ° F) T able 3. Ambient T emperature Effects NIST T ype Accuracy per 1.0 °C (1 . 8 °F) Change in Ambient T emperat ure (1) C (1) C[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-8 Ambient T emperature Notes Examples: When using a Pt 100 (  = 0.00385 ) sens or inpu t at 30 °C amb ien t temperature: • Digital T emperature Ef fects: 0.003 °C x (30 - 20) = .03 °C • Worst Ca se Error: Digit al + Digital T emperature Ef fects = 0.3 °C + .03 °C = [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-9 Rosemount 848T Aluminum/Plastic Juncti on Box—Cable Gland (opt ion codes JA2 and JP2) Dimensions are in in ches (millimeters) St ainless Steel Junction Box—Ca ble Gland (option code JS2) Dimensions are in inches (millimeters) T op View 3-D V iew Front V iew Side View 4.41 (1 12) 10.24 ([...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-10 Aluminum/Plastic Juncti on Box—Conduit Entry (opt ion codes JA3 and JP3) Dimensions are in inches (millimeters) St ainless Steel Junction Box—Con duit Entry (option code JS3) Dimensions are in inches (millimeters) T op View 3-D Vi ew Front Vi ew Side V iew 10.2 (260) 157[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-1 1 Rosemount 848T Mounting Options Aluminum/Plastic Junction Box (styles JA and JP) St ainless Steel Junction Box (style JS) Front V iew Side View Front View Side View Dimensions are in inches (millimeters) Aluminum/Plastic Junction Box Mounted on a V erti cal Pipe St ainless Steel Junction [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-12 ORDERING INFORMATION T a ble A-1. Rosemoun t 848 T F OUNDATION fiel dbus Ordering Information ★ The S tandard offering represents the most common options. The st arred options ( ★ ) should be selected for best delivery . __ The Expanded offering is subject to additional [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 A-13 Rosemount 848T Enclosure Options Standa rd Stan da rd JP1 Plastic Junction Box; No Entries ★ JP2 Plastic Box, Cable Glands (9 x M20 nickel-plat e d brass glands for 7.5–1 1.9 mm unarmored cable) ★ JP3 Plastic Box, Conduit Entries (5 Pl ugged Holes, suitable for installing 1 / 2 -in. [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-14[...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix B Product Certificates Hazardous Locations Certificates . . . . . . . . . . . . . . . . . . . p age B-1 Intrinsically Safe and Non-Incendive Installations . . . . . p age B-1 1 Inst allation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-2 IE FISCO (Fieldbus Intrinsically Safe Concept) Intrinsic Safety Intrinsically safe for use in Class I, Di vision 1, Groups A, B, C, D; when installed in accorda nce with Rosemount Drawing 00848-4404. T emperature Code: T4 (T amb = –40 to 60 °C) Non-incendive for use in Cla[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-3 Rosemount 848T Canadian St andards Association (CSA) Certifications E6 Explosion-Proof and Dust Ignition-Proof Class I, Division 1, Groups B, C, and D. Class II, Division 1, Groups E, F , and G . Class III Must be inst alled in enclosure op tion JX3. Install per dr awing 00848-1041. Conduit[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-4 N6 Class I, Division 2 Suitable for use in Class I, Division 2, Groups A, B, C, D. when installed per Rosemount drawing 00848-4405. T emperature Code: T3C = (–50  T a  60 °C) Must be installed in a suitable encl osure as determined acceptable by the local inspecti[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-5 Rosemount 848T Specia l Conditions for Safe Use (x): 1. This app aratus must be installed in an encl osure which af fords it a degree of protection of at least IP20. Non-metallic enclosures mus t have a surface resist ance of less than 1Gohm . Lig ht alloy or zirconium enclosures must be pr[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-6 Specia l Conditions for Safe Use (x): 1. Provisions shall be made, external to the ap paratus, to prevent the rated voltage of the ap paratus supply is not exceeded by transien t disturbances of more than 40% 2. The elec trical circui t is connecte d di r ect l y to e ar th ;[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-7 Rosemount 848T Specia l Conditions of Safe Use (x): 1. The component must be house d in a suitable certified enclosure. 2. Provisions shall be made, external to the ap paratus, to prevent the rated voltag e (42.2 V dc) being exceede d by transient disturbances of more than 40 %. IECEx Cert [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-8 N7 IECEx T ype n Approval Certificate No.” IECExBAS09.0032X Ex Na nL IIC T5 (T amb = – 40 to 65 °C) NOTE: N7 is valid with S001 and S002 Input T ypes Specia l Conditions of Safe Use: 1. The component must be house d in a suitable component certified enclosure that provid[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-9 Rosemount 848T China (NEPSI)Certifications I3 Intrinsic Safety Ex ia IIC T4 Certification Number: GYJ1 1 1365X Special Conditions for Safe Use (x): 2.1. Only when temperature transmitter is in st alled in IP 20(GB4208-2008 ) ho using, it could be used in hazardous location. The metallic hou[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-10 2.7. End users are not permitted to change any component’s insid es, but to settle the problem, in conjunction with manufactu rer to avoid damage to the pro duct. 2.8. During insta llation, use and main tenance of this product, observe following standards: GB3836.13-1997 &[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-1 1 Rosemount 848T INTRINSICALLY SAFE AND NO N-INCENDIVE INSTALLATIONS Safe Area Zone 2 (category 3) Zon e 1 (category 2) Zone 0 (category 1) Approval Division 2 Division 1 GAS INST ALLATIONS I5, I6, I1, I7, IE, IA N1, N7 N5 I5, I6, IE DUST INSTALLATIONS N5, ND 848T without enclosure Approved[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-12 INST ALLATION DRAWINGS The installatio n guidelines presented by the drawings must be followed in order to maint ain ce rtified ratings for in stalled transmitters. Rosemount Drawing 00848 -4404, 3 Sheets Factory Mutual Intrinsic Safe ty/ FISCO Installation Drawing Rosemount[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-13 Rosemount 848T Figure B-1. FM Intrinsic Safety/ FISCO Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-14 Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-15 Rosemount 848T Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-16 Figure B-2. CSA Intr insic Safety/ FISCO Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 B-17 Rosemount 848T Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-18 Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary[...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix C F OUNDATION ™ fieldbus T echnology Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age C-1 Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age C-1 Device Descriptions . . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-2 The Fieldbus F OUNDATION has established the function blocks by defining a small set of parameters used in all function bloc ks called universal paramete rs. The F OUNDATION has also defined a standard set of function block classes, such as input, output, co ntrol, and calcul[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 C-3 Rosemount 848T DEVICE DESCRIPTIONS Device Descriptions (DD) ar e sp ec ified too l def init i on s that are as sociated with the Resou rce and Transducer Blocks. D evice description s provide the definition and description of the fu nction bl ocks and their parameters. T o promote consisten[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-4 T wo types of alerts are defined for the block: event s and alarms. Events are used to report a st atus change when a bl ock le aves a particu lar sta te, such as when a parameter crosses a threshold. Alarms not only report a status change when a block leaves a p articular st[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 C-5 Rosemount 848T There may be many LM devices on a segment but only the LAS is actively controlling communication traffic. The remaining LM devices on the segment are in a stand- by state, ready to take over if the primar y LAS fails. This is achieved by constan tly monitoring the communicati[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-6 Backup LAS A LM device is one that has the ability to control the communic ations on the bus. The LAS is the LM capable de vice th at is currently in control of the bus. While there can be many LM devices acting as backups , the re can only be one LAS. The LAS is typically a [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 C-7 Rosemount 848T Figure C-4 diagra ms the m ethod of s cheduled da ta transfer . Schedule d data transfers ar e typically use d for the reg ular cyclic trans fer of proc ess loop data between devices on the fieldbus. Scheduled transfer s use publisher/ subscriber type of reporting for dat a t[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-8 Function Block Scheduling Figure C-6 shows an example of a link schedule. A single iteratio n of the link-wide sched ule is called the macrocyc le. When the system is configured and the function blocks are linked, a ma ster lin k-wide sche dule is create d for the LAS. Each d[...]

Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix D Function Blocks Analog Input (AI) Function Block . . . . . . . . . . . . . . . . . . . p age D-1 Multiple Analog Input ( MAI) Function Block . . . . . . . . . . p age D-9 Input Selector Function Block . . . . . . . . . . . . . . . . . . . . . . p age[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-2 10 XD_SCALE None The high and low scale va lues, engineering units code, and number of digits to the right of the decimal point associ ated with the channel input value. The XD_SCALE units code must match the uni ts code of the measurement channel in the transducer block. If [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-3 Rosemount 848T Functionality Simulation T o support testing, either change the mode of the block to man ual and adjust the output value, or enable simulation through the configur ation tool and manually enter a va lue for the measurement value and its st atus. In simulation, the ENABLE jump[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-4 Figure D-2. Analog Input Function Block Schematic Filtering The filtering fe ature changes the response time of the device to smooth variations in output readings caused by rapid changes in input. Adjust the filter time const ant (in seconds) usin g the PV_FTIME p arameter . [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-5 Rosemount 848T Indirect Square Root Indirect Square Root signal co nversion takes the square root of the value computed with the ind irect signal conversion and scales it to the range an d units of the PV and OUT parameters. When the conv erted input va lue is belo w the limit specified by [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-6 Modes The AI Funct ion Block su pports three mode s of opera tion as defin ed by the MODE_BLK para meter: Manual (Man) The value of the block output (OUT ) may be set manually Automatic (Aut o) OUT reflects the analog inpu t measurem ent or the simulated v alue when simulatio[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-7 Rosemount 848T St atus Handling Normally , the status of the PV reflect s the status of the measurement value, the operating co ndition of the I/O card , and any active ala rm condition. In Auto mode, OUT reflect s the value and status quality of the PV . In Man mode, the OUT sta tus consta[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-8 Application Information The configuration of the AI function bl ock and its associated ou tput channels depends on the specific application. A typical configuration for the AI block involves the follow ing parameters: CHANNEL The device support s more than one measurement, so[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-9 Rosemount 848T MULTIPLE ANALOG INPUT (MAI) FUNCTION BLOCK The Multiple Analog Input (MAI) function block has th e ability to process up to eight field device measur ements and make them available to other function blocks. The output values from the MAI block are in en gineering units and co[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-10 Functionality Simulation T o support testing, either change the mode of the block to man ual and adjust the output value or en able simulation through the co nfiguration tool and manually enter a va lue for the measurement value and its st atus (this single value will apply [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-1 1 Rosemount 848T Figure D-3. Multiple Analog Input Function Block T iming Diagram Figure D-4. Multiple Analog Input Function Block Schematic Filtering The filtering fe ature changes the response time of the device to smooth variations in output readings caused by rapid changes in input. Adj[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-12 Indirect Indirect sign al conversio n converts the signal linearly to the accessed channel input value (or the simulated value when simulation is enabled) from its specified ra nge (XD_SCALE) to the ra nge and unit s of the PV and OUT parame ters (OUT_SCALE). Indirect Square[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-13 Rosemount 848T Modes The MAI Function Blo c k su pp ort s three modes of ope ration as defined by the MODE_BLK para meter: Manual (Man) The block output (OUT) m ay be set manually Automatic (Aut o) OUT_1 to OUT_8 reflects th e analog input measurement or the simulated value when simulation[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-14 Application Information The intended use for this type of functi on block is for applications where the sensor type s and func tionality of ea ch channel (i.e. the simula te, scaling, filtering, alarms type, an d optio ns) are the same. The configuration of the MAI functi on[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-15 Rosemount 848T INPUT SELECTOR FUNCTION BLOCK The Input Selector (ISEL) function block can be use d to select the first good, Hot Backup, maximum, minimum, o r average of as many as eight in put values and place it at the output. The block support s signal status propag ation. There is proc[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-16 15, 16, 17, 18, 29, 30, 31, 32 DISAB LE_(1, 2 , 3, 4, 5, 6, 7, 8) None A connection from another block that disables the associated inp ut from the selection. 19 SELECT_TYPE None S pecifies input selection met hod. Methods available include: First Good, Minimum, Maximum, Mid[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-17 Rosemount 848T Functionality Figure D-5. Input Selector Function Block Schematic Block Errors T able D-7 lists conditions reported in the BLOCK_ERR parameter . Conditions in bold are inactive for the ISEL block and are given for reference. T able D-7. BLOCK_ERR Conditions Mode Logic OP_SEL[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-18 Modes The ISEL function block suppor ts three modes of operation as defined by the MODE_BLK para meter: Manual (Man) The block output (OUT) m ay be set manually . Automatic (Aut o) OUT reflects the select ed value. Out of Service (OOS) The block is not proces sed. The BLO CK[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 D-19 Rosemount 848T Block Executio n The ISEL function block reads the values an d status of up to eight input s. T o specify whic h of the six available m ethods (algo rithms) is use d to select the output, configure the sele ctor type parameter ( SELECT_TYPE) as follows: • Max selects the m[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-20 Figure D-6. Input Selector Function Block Application Example (SEL_TYPE = max) Figure D-7. Input Selector Function Block Application Example (SEL_TYPE = average) A VG _USE = 6 ISEL Block T roubleshooting IN1 = 126 °F IN2 = 1 18 °F IN3 = 104 °F IN4 = 107 °F OUT = 140 °F [...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Index-1 Rosemount 848T Numerics 2-Inch Pipe Stand Mounting . . . . . . . . . . . . . 2-3 A Alarms Configuration . . . . . . . . . . 3-3 Analog Input Configuration . . . . . . . . . . 3-6 Ground . . . . . . . . . . . . . . 2-9 Analog Input Function Block . . D-1 Advanced F eatures . . . . D-7 Al[...]

Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T Index-2 Modes . . . . . . . . . . . . . D-18 Automatic . . . . . . . . D-18 Manual . . . . . . . . . D-18 Out of Servi ce . . . . . D-18 Parameters . . . . . . . . . . D-15 Status H andling . . . . . . . D-19 Troubleshooting . . . . . . D-20 Installation . . . . . . . . . . . . .[...]

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