User's Manual
Table Of Contents
- SITRANS LR250 (FOUNDATION FIELDBUS)
- Legal information
- Table of contents
- 1 Introduction
- 2 Safety notes
- 3 Description
- 4 Installing/mounting
- 5 Connecting
- 6 Commissioning
- 7 Remote operation
- 7.1 Operating via AMS Device Manager
- 7.1.1 Functions in AMS Device Manager
- 7.1.2 Key features of AMS Device Manager Rev. 9.0
- 7.1.3 Adding a new device
- 7.1.4 Master Reset
- 7.1.5 Scan Device
- 7.1.6 Sensor calibration
- 7.1.7 Configuring a new device
- 7.1.8 Changing parameter settings using AMS Device Manager
- 7.1.9 Configure/Setup (Level Transducer Block-LTB)
- 7.1.10 Configure/Setup (Liquid Crystal Display Block-LCD)
- 7.1.11 Configure/Setup (Diagnostic Transducer Block-DIAG)
- 7.1.12 Configure/Setup (Resource Block - RESOURCE)
- 7.1.13 Device Diagnostics (Level Transducer Block - LTB)
- 7.1.14 Device Diagnostics (Liquid Crystal Display Block - LCD)
- 7.1.15 Device Diagnostics (Diagnostic Transducer Block - DIAG)
- 7.1.16 Device Diagnostics (Resource Block - RESOURCE)
- 7.1.17 Process Variables (Level Transducer Block - LTB)
- 7.1.18 Password Protection
- 7.1.19 AMS menu structure
- 7.1 Operating via AMS Device Manager
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Threaded horn antenna
- 12.2 Threaded horn antenna with extension
- 12.3 Flanged horn antenna
- 12.4 Flanged horn antenna with extension
- 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.7 Threaded PVDF antenna
- 12.8 Threaded connection markings
- 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna
- 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.11 Flat-Face flange
- 12.12 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- B Appendix B: Communications via Foundation Fieldbus
- C Appendix C: Certificates and support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
Connecting
5.3 Wiring setups with Foundation Fieldbus for hazardous areas
SITRANS LR250 (FOUNDATION FIELDBUS)
Operating Instructions, 01/2014, A5E32221411-AB
33
Entity concept:
The Entity Concept allows interconnection of intrinsically safe apparatus to associated apparatus
not specifically examined in such combination. The criteria for interconnection is that the voltage
and current which intrinsically safe apparatus can receive and remain intrinsically safe,
considering faults, must be equal to or greater than the output voltage (Uo) and output current
(Io) levels which can be delivered by the associated apparatus, considering faults and applicable
factors. In addition, the maximum unprotected capacitance (Ci) and Inductance (Li) of the
intrinsically safe apparatus, including interconnecting wiring, must be equal to or less than the
capacitance and inductance which can be safely connected to associated apparatus.
Under the entity evaluation concept, SITRANS LR250 has the following characteristics:
(input voltage) U
i
= 24 V
(input current) I
i
= 250 mA
(input power) P
i
= 1.2 W
(internal capacitance) Ci
= 0
(internal inductance) Li
= 0