Related Manuals for Eaton MTL7787 Minus
Summarization of Contents
ATEX Safety Instructions
General Safety and Competence
General safety and competence requirements for installation and operation under ATEX.
Installation Requirements
Installation requirements and considerations for ATEX-compliant apparatus.
Special Conditions for Zone 2 Use
Specific conditions for safe use of barriers in Zone 2 hazardous areas.
Inspection and Maintenance Guidelines
Guidelines for inspection and maintenance procedures.
Overview
Related Publications
Lists application notes and catalogues for further information on intrinsic safety and MTL7700 barriers.
Description
2.1 Introduction
Introduces the MTL7700 range of intrinsically safe shunt-diode safety barriers.
2.2 MTL7700 Range – Barrier Ranges
Details the various models within the MTL7700 range of shunt-diode safety barriers.
2.3 MTL7700 Range – Accessories
Lists and describes essential mounting, tagging, power, and earthing accessories for the MTL7700 range.
Safety Considerations
3.1 General Requirements
Outlines general safety requirements and considerations for installing MTL7700 range barriers.
3.2 Safety Checks
Provides a checklist of essential safety checks for barrier installation and maintenance.
Installation
4.1 General
Covers general installation aspects, including DIN-rail length and clearances.
4.2 Mounting/Removing Barriers
Details the procedure for securely mounting and removing MTL7700 range barriers from DIN-rail.
4.3 Installation Accessories
Details DIN-rail, spacers, earth terminals, tagging, and power bus accessories for installation.
Wiring Connections
5.1 General
Outlines the structure of wiring connection descriptions within the manual.
5.2 Barrier Connections
Explains how to make safe-area and hazardous-area connections to the barriers.
5.3 Connections to Plant Earth
Details the proper methods for earthing the barrier installation to the plant earth.
5.4 Connections to Dummy Barriers
Describes the use of MTL7799 dummy barriers for unused cable cores and OV returns.
Maintenance
6.1 General
States that MTL7700 barriers are encapsulated and not repairable; maintenance involves routine inspection.
6.2 Routine Inspection
Specifies visual checks and safety precautions for routine inspection of barrier installations.
Fault-Finding
7.1 Introduction
Introduces fault-finding procedures using digital multimeters and explains diode testing.
7.2 Power Supply Check
Explains how to check the power supply to individual barrier circuits for functionality.
7.3 Barrier Resistance Test
Details the procedure for testing barrier resistance using a digital multimeter.
Equipment and Barrier Tests
8.1 Thermocouple and RTD Tests
Describes testing procedures for thermocouple and RTD circuits using barriers.
8.2 Barrier Tests
Outlines general barrier testing, including multimeter and bench tests.
8.3 Tests for Active Barriers
Details specific test procedures for active barrier models.
8.4 Test Tables for Passive Barriers
Refers to tables providing test data for passive barriers.
Appendix A: Typical Wiring Connections for Specific Applications
Wiring Diagrams for Various Applications
Illustrates typical wiring configurations for transmitters, thermocouples, switch/proximity inputs, and outputs.
Appendix B
Table A - Safety Descriptions
Lists safety descriptions for various MTL7700 barrier models.
Table B - Maximum Cable Parameters - IIC Gas Group
Provides maximum cable parameters for IIC gas group applications.
Table C - Maximum Cable Parameters - IIB Gas Group
Provides maximum cable parameters for IIB gas group applications.
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