MTL4851 & MTL4852 HART multiplexers

The MTL4851/52 HART connection system is the system of choice for unrivalled flexibility. Based on 16 channel modularity the system can be easiliy expanded to cover up to 7936 HART devices on one network. The flexibility of the MTL4851/52 and its ability to communicate with any of the Instrument Management Software (IMS) packages on the market today allows us to offer the optimum solution for any application – both general purpose and Intrinsically Safe.

The HART multiplexer provides the brains of the system and consists of a combination of two modules, the MTL4851 – HART communications module and MTL4852 – HART interface module. They provide the HART data interface between smart devices in the field and HART instrument management software running on a PC. The modules, which mount on to a range of HART backplanes, connect to the field devices via either HART connection units or IS backplanes depending on the application.

For product certificates <click here>

Product Code Description Downloads
intrinsically safe logo Symbol denotes that the equipment is suitable for use in hazardous area applications.
fsm logo Symbol denotes that the product has been assessed for functional safety applications
DTM Software MTL Generic Comms DTM for all MTL HART multiplexers File
MTL4851_MTL4852 HART communications modules Datasheet  Manual

MTL4854 Multi-modem multiplexer

For applications where communication paths with several field devices need to be established and maintained in parallel, the MTL4854 HART® multiplexer is the ideal product to use. This is a module that has the same 32 channel capacity as the MTL4850 for connection to field devices but now has four HART modems rather than just one.

Essentially this gives 4 x 8 channel multiplexers in one compact housing, enabling simultaneous communication with several field devices through one serial link. One particular use for this is during partial-stroke testing of valve positioners, where the ability to maintain access to other connected devices while the multiplexer would otherwise be locked enables plant monitoring to continue.

The MTL4854 HART multiplexer offers the following benefits:

  • Connection to multiple HART devices simultaneously
  • Faster initialisation and loop scanning
  • Channel to channel isolation
  • Plug-and-play for serial link communication parameters
  • LED indication for fault diagnosis
  • Supports HART rev 5 – 7 devices
  • Onboard event log
  • ATEX and IECEx certification (FM, FMc to be advised)

For product certificates <click here>

Product Code Description Downloads
intrinsically safe logo Symbol denotes that the equipment is suitable for use in hazardous area applications.
fsm logo Symbol denotes that the product has been assessed for functional safety applications
DTM Software MTL Generic Comms DTM for all MTL HART multiplexers File
MTL4854 HART multiplexer, multi-modem Datasheet  Manual

MTL4850 SIL3 multiplexer

The MTL4850 HART Multiplexer offers a smaller footprint solution ideally suited to both retrofit and new project applications. Termination boards, carriers and integrated backplanes are available to enable the MTL4850 to interface to various instrumentation applications.

The MTL4850 Hart Multiplexer is now SIL3 rated for connection to instrument loops performing safety functions up to and including Safety Integrity Level SIL3. The international standard IEC 61508:2010 provides guidelines to achieving an adequate Safety Integrity Level (SIL) for systems, sub-systems and components. Functional Safety management requirements are found in IEC61508 which states that suppliers and subcontractors shall demonstrate functional safety management.

We conform to the requirements of the international standard IEC 61508:2010 for functional safety by being certified as a Functional Safety Management company.

For more information about MTL Functional Safety Management .

The MTL4850 Multiplexer offers the following benefits:

  • Channel to channel isolation
  • Isolated power supply
  • Auto baud-rate detection
  • LED indication for fault diagnosis
  • Supports HART Rev. 5-7 devices
  • SIL3 certified for connection to safety loop
  • Onboard event log
  • ATEX, FM and CSA certification.

For product certificates

Product Code Description Downloads
intrinsically safe logo Symbol denotes that the equipment is suitable for use in hazardous area applications.
fsm logo Symbol denotes that the product has been assessed for functional safety applications
DTM Software MTL Generic Comms DTM for all MTL HART multiplexers File
INA4850 MTL4850 range – Instructions for Safe Use Manual
MTL4850    HART Multiplexer Datasheet  Manual
MTL4850-TR HART Multiplexer (Triconex) Datasheet  Manual
SM4850 MTL4850 – Safety Manual Safety Manual