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MTL660 Loop Powered Indicators

The MTL600 range of digital indicators enable process variables to be displayed locally in hazardous and general purpose plant areas. A typical example would be the re-transmission of mass/flow computations from the safe area, through a suitable MTL IS interface to the indicator in the hazardous area.

The displays are loop powered from the 4-20mA process signal and their low voltage drop allows them to be installed in almost any 2-wire, 4-20mA transmitter loop. All units can indicate measured values in a linear or a square root extraction mode; the latter being used, for example, to display flow from differential pressure measurement devices such as orifice plates, Dall tubes, or venturi.

The MTL661 field mounting unit is housed in a tough aluminium enclosure, suitable for wall or pipe mounting. For corrosive atmospheres, use the MTL663 - the plastic case provides excellent resistance to harmful contaminents.

The MTL665 is the panel mounted version and is IP65, IP66, IP67 and NEMA 4 rated.

MTL66x IS indicators are classified as ‘non-energy storing’ simple apparatus so they can be inserted into any IS loop without re-certification.

Safety
Excellent resistance to harmful contaminents
Reliability
Housed in a tough aluminium enclosure
Ease of Use
Installed in almost any 2-wire, 4-20mA transmitter loop

Certifications and compliances

 

For MTL66x & MTL66xB models

  • Zone 0 mounting
  • Group IIC & IIIC
  • T4 temperature classification
  • Certified for -25°C to +70°C

For MTL66x & MTL66xB models

  • Class I, II & III, Division 1 mounting
  • Class I, Zone 0 mounting
  • Group IIC
  • T4 temperature classification
  • IP65

CE marked for compliance with EMC, ATEX and RoHS Directives.

Approvals held and approval details vary between models. Please refer to certificates for specific details.

Design features

  • Loop powered 4-20mA
  • Field and panel mounting
  • Environmental protection to IP67
  • Easy to configure
  • Number of displayed digits configurable
  • Backlight options
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