iv
6.5 Analogue Output modules ...............................................................46
6.5.1 MTL5546/MTL5546Y/MTL5546Y-T - Isolating Driver .............................................46
6.5.2 MTL5549/ MTL5549Y - Isolating Driver .......................................................47
6.6 Fire and Smoke Interface modules .........................................................48
6.6.1 MTL5561 - Fire and Smoke Detector Interface .................................................48
6.7 Temperature Input module ...............................................................49
6.7.1 MTL5573 - Temperature Converter ...........................................................50
6.7.2 MTL5575 - Temperature Converter ...........................................................51
6.7.3 MTL5576-RTD - Temperature Converter .......................................................52
6.7.4 MTL5576-THC - Temperature Converter .......................................................53
6.7.5 MTL5581 - mV/Thermocouple Isolator ........................................................54
6.7.6 MTL5582/MTL5582B - mV/Resistance Isolator .................................................55
6.8 General modules .......................................................................56
6.8.1 MTL5599 - Dummy Isolator ................................................................56
6.8.2 MTL5991 - 24V dc power supply ............................................................57
6.9 PCS45/PCL45USB configurator for MTL temperature converters ................................58
7 FAULT FINDING AND ROUTINE MAINTENANCE ........................................59
7.1 Maintenance precautions ................................................................59
7.2 Fault finding ...........................................................................59
7.3 Routine maintenance ....................................................................59
8 BENCH TESTING MODULES .........................................................60
8.1 Digital Input (DI) modules ................................................................60
8.2 Digital Output (DO) modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
8.3 Analogue Input (AI) Modules .............................................................62
8.4 Analogue Output (AO) Modules ...........................................................65
8.5 Testing the functioning of other modules ...................................................65
9 APPLICATIONS INVOLVING ZONE 2 AND/OR ZONE 22 HAZARDOUS AREAS ................66
9.1 Enclosure ..............................................................................66
10 APPENDIX 1 ......................................................................67
10.1 MTL5000 ..............................................................................67
10.2 MTL5018AC - Switch/proximity detector ....................................................68
10.3 MTL5051 serial data comms isolator .......................................................70
10.4 MTL5314 trip amplifier for 2– or 3– wire transmitters .........................................73
11 APPENDIX 2 ......................................................................76
11.1 Table A - Safety descriptions ..............................................................76
11.2 Table B - Maximum cable parameters - IIC gas group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
11.3 Table C - Maximum cable parameters - IIB gas group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
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