Emerson 848T Rosemount 848T

Reference Manual

00809-0100-4697, Rev EA

October 2011

Rosemount 848T

1-2

OVERVIEW

Transmitter The Rosemount 848T is optimal for process temperature measurement

because of its ability to simultaneously measure eight separate and

independent temperature points with one transmitter. Multiple temperature

sensor types may be connected to each 848T transmitter. In addition, the

848T can accept 4-20 mA inputs. The enhanced measurement capability of

the 848T allows it to communicate these variables to any FOUNDATION

fieldbus host or configuration tool.

Manual This manual is designed to assist in the installation, operation, and

maintenance of the Rosemount 848T Temperature Transmitter.

Section 1: Introduction

• Overview

• Considerations

• Return of Materials

Section 2: Installation

• Mounting

• Installation

• Wiring

• Power Supply

• Commissioning

Section 3: Configuration

•F

OUNDATION fieldbus Technology

• Configuration

• Function Block Configuration

Section 4: Operation and Maintenance

• Hardware Maintenance

• Troubleshooting

Appendix A: Specification and Reference Data

• Specifications

• Dimensional Drawings

• Ordering Information

Appendix B: Product Certificates

• Hazardous Locations Certificates

• Intrinsically Safe and Non-Incendive Installations

• Installation Drawings

Appendix C: Foundation™ Fieldbus Technology

• Device Descriptions

• Block Operat ion

Appendix D: Fun ctio n Blocks

• Analog Input (AI) Function Block

• Multiple Analog Input (MAI) Function Block

• Input Selector Function Block

Contents

Main Page October 2011 Rosemount 848T Rosemount 848T High Density Temperature Transmitter with FOUNDATION fieldbus NOTICE Page Reference Manual Table of Contents SECTION 1 Introduction SECTION 2 Installation SECTION 3 Configuration Page Section 1 Introduction Rosemount 848T OVERVIEW T ransmitter Manual Reference Manual SERVICE SUPPORT Page Reference Manual Section 2 Installation SAFETY MESSAGES MOUNTING Mounting to a DIN Rail Without an Enclosure Mounting to a Panel with a Junction Box Reference Manual Mounting to a 2-in. Pipe S t and 2-in. pipe sta nd when using a junction box. WIRING Connections Page Page Reference Manual Power Supply Surges/T ransients GROUNDING Page SWITCHES Reference Manual T AGGING INSTALLATION Using Cable Glands Using Conduit Entries Section 3 Configuration CONFIGURATION St andard Transmitter Configuration Custom Configuration Methods Reference Manual Alarms Damping Configure the Differential Sensors Configure Measurement Va l i d a t i o n COMMON CONFIGURATIONS FOR HIGH DENSITY APPLICATIONS Page Interfacing Analog Transmitters to FOUNDATION fieldbus Reference Manual BLOCK CONFIGURATION Resource Block Page Page Page Reference Manual PlantWeb Page Page Recommended Actions for PlantWeb Alert s Reference Manual T ransducer Blocks Figure 3-1. Transducer Block Data Flow Page Table 3-10. Transducer Block Parameters Page Transducer Block Sub-Parameter Tables Table 3-11. XD_ERROR Table 3-12. SENSOR_CONFIG Table 3-13. SENSOR_STATUS Table 3-14. SENSOR_CAL Table 3-15. CAL_STATUS Structure Table 3-16. Transducer Status Page Page Page Reference Manual Section 4 Operation and Maintenance SAFETY MESSAGES FOUNDATION FIELDBUS INFORMATION Rosemount 848T Commissioning (Addressing) Page FOUNDATION fieldbus Resource Block Transducer Block Troubleshooting Reference Manual Appendix A Reference Data FUNCTIONAL SPECIFICATIONS Page Reference Manual PHYSICAL SPECIFICATIONS FUNCTION BLOCKS PERFORMANCE SPECIFICATIONS Accuracy Differential Configuration Notes Page A-7 Ambient Temperature Effect DIMENSIONAL DRAWINGS Rosemount 848T Reference Manual A-9 Aluminum/Plastic Junction BoxCable Gland (option codes JA2 and JP2) Front Vie w Side View Stainless Steel Junction BoxCable Gland (option code JS2) Aluminum/Plastic Junction BoxConduit Entry (option codes JA3 and JP3) Stainless Steel Junction BoxConduit Entry (option code JS3) Page ORDERING INFORMATION T able A-1. Options T able A-1. Page Reference Manual Appendix B Product Certificates HAZARDOUS LOCATIONS CERTIFICATES North American Approvals Page Page European Approvals Page Page Page Page Page Page Reference Manual INTRINSICALLY SAFE AND NON-INCENDIVE INSTALLATIONS GAS INSTALLATIONS DUST INSTALLATIONS Page Page Page Page Page Page Page Reference Manual Appendix C FOUNDATION fieldbus Technology OVERVIEW FUNCTION BLOCKS Rosemount 848T Reference Manual DEVICE DESCRIPTIONS BLOCK OPERATION Instrument- Specific Function Blocks Alert s NETWORK COMMUNICATION Link Active Scheduler (LAS) Page Addressing Scheduled T ransfers Reference Manual Unscheduled T ransfers Function Block Scheduling Reference Manual Appendix D Function Blocks ANALOG INPUT (AI) FUNCTION BLOCK AI Table D-1. Analog Input Function Block Parameters Reference Manual Functionality Page Page Page Page AI Block Reference Manual MAI MULTIPLE ANALOG INPUT (MAI) FUNCTION BLOCK Functionality Page Page Page MAI Block Reference Manual INPUT SELECTOR FUNCTION BLOCK ISEL Table D-6. Input Selector Function Block Parameters Reference Manual Functionality Page Page Figure D-6. Input Selector Function Block Application Example (SEL_TYPE = max) Figure D-7. Input Selector Function Block Application Example (SEL_TYPE = average) AVG_USE = 6 ISEL Block Index