Rosemount believe that its Model 848T temperature transmitter with Foundation Fieldbus provides the lowest installed cost solution for temperature monitoring applications - and that traditional monitoring architectures including sensors wired direct and multiplexers will be influenced by its new temperature transmitter.
Features include:
Transmission of eight temperature measurements per transmitter; transmission of up to 128 measurements per Foundation Fieldbus segment; flexible mounting capabilities; field-hardened, intrinsically safe, low power; diagnostics and calculation capabilities; and suitable for temperature monitoring on distillation columns, tanks, reactors, boilers, furnaces, turbines, and compressors.
Rosemount reports that cost reductions as much as 70% in material, installation labour, and documentation are achievable when comparing this new device to a traditional sensor wire direct application. Elimination of expensive sensor wire runs and reduced terminations provide the material and labour cost savings. The documentation cost savings are a result of the simplified installation provided by the transmitter and Foundation Fieldbus topology.
Foundation Fieldbus technology included
Eight analog input (AI) function blocks to communicate individual measurements with alarming; one multiple analog input (MAI) function block to efficiently communicate all eight measurements at once; four input selector (ISEL) function blocks for selecting average, minimum, maximum, midpoint, or first good status temperatures; backup link active scheduler (LAS); Model 848T mounts anywhere in your plant; field hardened; mounts in the field, in the hazardous area; ambient temperature limits: -40 to +185°F (-40 to +85°C); mounts in harsh atmospheric environments with a junction box; (NEMA Type 4X and IP66 ratings); operates in high vibration environments (3 g); Heavy Industry EMI/RFI Compliance (IEC 61326).
Intrinsically safe
Intrinsically safe for Class I, II, III, Division 1/Zone 0; FISCO (fieldbus intrinsically safe concept); two-wire powered; and 9-32 V d.c., 22 mA max.
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