v
IMPORTANT NOTE
WARNING 
This manual has content describing the use and installation of safety 
equipment. This equipment must be installed, operated and maintained 
only by trained competent personnel and in accordance with all appropriate 
international, national and local standard codes of practice and site 
regulations for intrinsically safe apparatus and in accordance with the 
instructions contained here.
ATEX
If the country of installation is governed by the Essential Health and Safety Requirements 
(Annex II) of the EU Directive 2014/34/EU [the ATEX Directive - safety of apparatus] then 
consult the ATEX safety instructions for safe use in this manual before installation.
Note: Refer to the website for multiple language safety instructions. 
ELECTRICAL PARAMETERS
Refer to the certification documentation for the electrical rating of these products.
CERTIFICATION DOCUMENTATION
Our website http://www.mtl-inst.com contains product documentation regarding intrinsic 
safety certification for many locations around the world. Consult this data for information 
relevant to your local certifying authority.
FUNCTIONAL SAFETY
If the MTL5500 range of products are to be used in functional safety applications check that 
each module has been assessed for that service and refer to the Safety Manual for details.
REPAIR
MTL5500 range of products MUST NOT be repaired. Faulty or damaged products must be 
replaced with an equivalent certified product.
Symbols used on the product and in this manual
CAUTION -  
Read the instructions
CAUTION -  
Hot surface