MTL5541 ATEX (4-20mA) isolation

MTL5541 provides a fully-floating dc supply for energising a conventional 2- or 3-wire 4/20mA transmitter, which is located in the hazardous (ATEX) area, and repeats the current in another floating circuit to drive a safe-area load. For HART 2-wire transmitters, the unit allows bi-directional communications signals superimposed on the 4/20mA loop current. Alternatively, the MTLx541S acts as a current sink for a safe-area connection rather than driving a current into the load.

MTL5541 ATEX isolation specifications:

• Simple, low cost ATEX “barrier” for single channel 4-20mA isolation to the hazardous area
• Supports HART devices and will push through the superimposed HART signal over the 4-20mA
• Can be used to power the transmitter (or sink with existing supply)
• Simple DIN rail mountable
• Green LED power indication
• ATEX Certification for gas and dust applications
  • [Ex ia Ga] IIC  /  [Ex ia Da] IIIC  (See certificate in the downloads section)
• Up to SIL3 compliance
• Compact design and footprint

Note that in its default design, (model: MTL5541) the barrier is supplied in source function (ie this will power the 4-20mA loop going back to your control system, in the safe area).  We can also offer model: MTL5541/S which gives a sink function.  A “sink” barrier requires you to put your own supply on the control side.  Specify your requirements at quote stage with Fluidic.

For a dual channel ATEX isolation, consider the MTL5544.

Fluidic have access to these ATEX barriers via our official Status partnership.  Along with ATEX barriers (power supplies) we offer a range of ATEX qualified instruments from Status and our other partners.  Our instrumentation engineers are product trained and are able to help with instrument selection within the full Status Instruments supply scope. Please call either office for more information (Glasgow 0141 641 5920,  Warrington 01925 572401).