Eaton MTL7700 - Table of Contents

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INM 7700 Rev 12
DECLARATION OF CONFORMITY ...................................................... . II
NOTE ............................................................................ . II
ATEX SAFETY INSTRUCTIONS ........................................................ . IV
1 OVERVIEW ......................................................................... 1
2 DESCRIPTION ....................................................................... 1
2.1 Introduction ............................................................................... 1
2.2 MTL7700 range – barrier ranges ............................................................... 1
2.3 MTL7700 range – accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 SAFETY CONSIDERATIONS ........................................................... 3
3.1 General requirements ....................................................................... 3
3.2 Safety checks .............................................................................. 3
4 INSTALLATION ...................................................................... 3
4.1 General ................................................................................... 3
4.2 Mounting/removing barriers .................................................................. 3
4.3 Installing accessories ........................................................................ 3
5 WIRING CONNECTIONS .............................................................. 7
5.1 General ................................................................................... 7
5.2 Barrier connections ......................................................................... 7
5.3 Connections to plant earth .................................................................. 7
5.4 Connections to dummy barriers ............................................................... 9
6 MAINTENANCE ..................................................................... 9
6.1 General ................................................................................... 9
6.2 Routine inspection .......................................................................... 9
7 FAULT-FINDING ..................................................................... 10
7.1 Introduction ............................................................................... 10
7.2 Power supply check ........................................................................ 11
7.3 Barrier resistance test ....................................................................... 11
8 EQUIPMENT AND BARRIER TESTS ..................................................... 11
8.1 Thermocouple and RTD tests ................................................................. 11
8.2 Barrier tests ............................................................................... 11
8.3 Tests for Active Barriers ..................................................................... 12
8.4 Test tables for passive barriers ............................................................... 14
9 APPENDIX A: TYPICAL WIRING CONNECTIONS FOR SPECIFIC APPLICATIONS ................. 17
10 APPENDIX B:
Table A - Safety Descriptions ................................................................. 19
Table B - Maximum Cable Parameters - IIC Gas Group ............................................ 19
Table C - Maximum Cable Parameters - IIB Gas Group ............................................ 19
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