Eaton CROUSE-HINDS MTL4500 Series Safety Manual
Analogue input modules with passive input for 4-wire separately powered transmitters
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Also See for CROUSE-HINDS MTL4500 Series:
- Instruction manual (76 pages) ,
- Safety manual (16 pages)
Table of Contents
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Safety manual
MTL intrinsic safety solutions
MTL4500/MTL5500 range
Analogue Input Modules with passive input for
4-wire separately powered transmitters
MTL4541A, MTL4541AS, MTL5541A, MTL5541AS,
MTL4544A, MTL4544AS, MTL5544A, MTL5544AS
FUNCTIONAL SAFETY MANAGEMENT
These products are for use as elements within a Safety System conforming to the requirements of IEC
61508:2010 and enable a Safety Integrity Level of up to SIL 2 to be achieved for the instrument loop in a
simplex architecture.
Eaton Electric Ltd, Luton is a certified Functional Safety Management company meeting the requirements
of IEC61508:2010 Part 1, Clause 6.
* Subject to special conditions for detection of out-of-range signal currents. Refer to content of this manual for details.
April 2024
SM4541A/AS, 5541A/AS,
4544A/AS, 5544A/AS rev 2
*
SIL
2
IEC 61508:2010
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Summary of Contents for Eaton CROUSE-HINDS MTL4500 Series
- Page 1 61508:2010 and enable a Safety Integrity Level of up to SIL 2 to be achieved for the instrument loop in a simplex architecture. Eaton Electric Ltd, Luton is a certified Functional Safety Management company meeting the requirements of IEC61508:2010 Part 1, Clause 6.
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Page 2: Table Of Contents
Specifically, the data sheet, instruction manual and applicable certificates for the particular 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) †... -
Page 3: Module Type
INTRODUCTION Application and function The Analogue Input module types MTLx541A/MTLx541AS (single channel) and MTLx544A/MTLx544AS (dual channel) are intrinsic safety isolators that interface with process measurement transmitters located in a hazardous area of a process plant. They are also designed and assessed according to IEC 61508 for use in safety instrumented systems up to SIL 2. -
Page 4: Product Build Revisions Covered By This Manual
Field wiring Safety Instrumented Safety Instrumented System (SIS) System (SIS) Logic Solver with ‘ Passive ’ MTLx541A/ Logic Solver with 2-wire input input 4-wire MTLx544A MTLx541AS/MTLx544AS Transmitter or (Safe area current sink) Current (Safe area current source) limiter current source Output MTL4541A, MTL5541A, MTL5541AS... -
Page 5: System Configuration
System configuration An MTLx54x module may be used in single-channel (1oo1) safety functions up to SIL 2. The worked example in this manual is for a SIL 2 application. The figure below shows the system configuration and specifies detailed interfaces to the safety-related and non safety-related system components. -
Page 6: Associated System Components
Associated System Components There are many parallels between the loop components that must be assessed for intrinsic safety as well as functional safety. In both situations the contribution of each part is considered in relation to the whole. The MTLx54xA/MTLx54xAS modules are components in the signal path between safety-related process trans- mitters and safety-related control systems. -
Page 7: Systematic Safety Integrity
Systematic Safety Integrity The MTLx54x modules have a systematic safety integrity measure of SC 2. This has been established using compliance Route 1 , as described in IEC 61508-2: 2010, section 7 .4.2.2 c. SIL Capability Considering both the hardware safety integrity and the systematic capability, this allows the modules to be used in safety functions up to SIL 2 in a simplex architecture (HFT=0), provided SFF ≥60% is the case for the application. -
Page 8: Emc
The MTL4500 and MTL5500 modules are designed for operation in normal industrial electromagnetic environ- ment but, to support good practice, modules should be mounted without being subjected to undue conducted or radiated interference, see Appendix A for applicable standards and levels. Environmental The MTL4500 and MTL5500 modules operate over the temperature range from -20°C to +60°C, and at up to 95% non-condensing relative humidity. -
Page 9: Maintenance
MTL office. When appropriate, a Cus- tomer Incident Report (CIR) will be notified by Eaton to enable the return of the unit to the factory for analysis. -
Page 10: Appendix B: Proof Test Procedure, Mtlx541A/As, Mtlx544A/As Modules
Appendix B: Proof Test Procedure, MTLx541A/AS, MTLx544A/AS Modules Confirmation, through testing, that a safety function will operate as designed, is a necessary periodic activity to ensure that the probability of failure upon demand (PFDavg) is maintained. In some applications, the user may prefer to conduct a proof test on the overall safety instrumented function without dismantling or disconnecting the individual instrumentation components, in order to avoid disturbing the integrity of the installation. - Page 11 1 System - Normal operation test Make sure that the module to be tested is operating normally in the target system, without errors and in an energised mode. If the module is in a faulty or de-energised loop, restore normal fault-free and energised operation before testing.
- Page 12 Measurements Make the following measurements. It is recommended to record the results in a table such as that shown on the next page. 1. Adjust resistor RV1 to vary the loop current (measured by Ammeter A1) through the range 4 to 20mA. (Tests 1 - 5 in table) 2.
- Page 13 THIS PAGE IS LEFT INTENTIONALLY BLANK SM4541A/AS, 5541A/AS, 4544A/AS, 5544A/AS rev 2...
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- Page 16 If further assistance is required, please contact an authorised MTL Distributor, Sales Office, or Customer Service Department AUSTRALIA NORWAY Eaton Electrical (Australia) Pty Ltd, Norex AS 10 Kent Road, Mascot, New South Wales, 2020, Australia Fekjan 7c, Postboks 147 , N-1378 Nesbru, Norway Tel: +61 1300 308 374 Fax: +61 1300 308 463 E-mail: mtlsalesanz@eaton.com...
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