1 SM4561_5561 rev 1
Safety manual
MTL intrinsic safety solutions
February 2020
SM4561_5561 rev 1
MTL4561/5561 Fire detector interface
2-channel, for use with conventional Fire &
Smoke detectors located in hazardous areas
Eaton Electric Ltd, Luton is a certified Functional Safety Management company
meeting the requirements of IEC61508: 2010 Part 1, Clause 6.
* Subject to specific operating conditions. Refer to content of this manual for details.
2 SM4561_5561 rev 1
Fire & Smoke Detector Interface, 2-channel
Contents
1 INTRODUCTION ................................................................. 3
1.1 Application and function .................................... 3
1.2 Product build information covered
by this manual ............................................................ 3
2 SYSTEM CONSIDERATIONS ............................................... 4
2.1 Associated System Components ........................ 4
3 ASSESSMENT OF FUNCTIONAL SAFETY ............................ 5
3.1 Hardware Safety Integrity .................................. 5
3.2 Assumptions ....................................................... 5
3.3 Systematic Safety Integrity ................................. 5
3.4 SIL Capability ...................................................... 6
3.5 Example of use in a safety function .................... 6
3.6 EMC .................................................................... 6
3.7 Environmental .................................................... 7
4 INSTALLATION ................................................................... 7
5 MAINTENANCE .................................................................. 7
6 APPENDICES ...................................................................... 8
6.1 Appendix A: Summary of
applicable standards .................................................. 8
6.2 Appendix B: Proof Test Procedure,
MTL4561 and MTL5561 Modules .............................. 8
This manual supports the application of the product in functional-safety related loops. It must be used in conjunction
with other supporting documents to achieve correct installation, commissioning and operation. Specifically, the
product data sheet, instruction manual and applicable certificates for the product should be consulted, all of which
are available on the MTL web site.
In the interest of further technical developments, Eaton reserve the right to make design changes
Hardware Fault Tolerance
(HFT)
†
Module type:
MTL4561
MTL5561
0, 1
† These modules have an inherent fault tolerance of 0.
Functional Safety
Approved Company