Intrinsic Safety Barriers

Choosing the right Barrier range

MTL's barrier development program is directed towards adding value by increasing packing densities, simplifying installation, reducing vulnerability to faults, providing a barrier exactly suited to the process systems. The 'key' barrier concept simplifies choosing and stocking the most appropriate barriers.

MTL7000 The MTL7000 Series is the most recent range from MTL. Based on the proven circuit designs of the MTL700 Series, these ultra-slim barriers can also duplicate and replace many functions of conventional terminals. Key features are a width of only 7mm for 1-, 2- and 3-channel barriers, direct DIN-rail mounting and earthing, and optional replaceable fuses or removable links which act as disconnect mechanisms combining high packing densities with quick, simple and virtually fool-proof installation and commissioning.

MTL4700 The MTL4700 Series combines MTL700 Series circuit designs with the modular 'plug in' backplane-based mounting concept introduced by the MTL4000 Series of isolators. Multi-channel designs (up to 6 channels in one module) provide high packing densities, while customised backplanes permit very close integration into OEM packages and process systems.

MTL700 Series The MTL700 Series is now virtually an 'industry standard', noted for its robust fixing and earthing arrangements, and field-proven circuitry. The range includes overvoltage-protected barriers and a sub-series of higher-power versions. 1- and 2-channel devices are available within the same case width.

The relative merits of galvanic isolators and shunt-diode safety barriers are discussed in technical paper TP1113.

Data Sheet