BASIC INFO
MTL3000 series MTL3041 REPEATER POWER SUPPLY 4/20mA for 2-wire transmitters has been discontinued.
MTL3000 Series interface units offered a compact and easy-to-use means for communicating safely with process measuring, indicating, actuating and local control equipment in hazardous areas. The comprehensive range of models included analogue, switch and serial-digital signals in both directions, amplifying or otherwise conditioning them as required and at the same time providing world wide certified explosion protection for equipment and wiring in all zones and all explosive atmospheres. It also provided an alternative to the shunt-diode safety barrier where isolation was essential or preferred or a high-integrity earth was not readily available.
The MTL5500 Series are the recommended replacements for this series.
MTL3041 REPEATER POWER SUPPLY, 4/20mA for 2-wire transmitters.
The MTL3041 provides a fully-floating dc supply for energising a 2- Load wire, 4/20mA transmitter in a hazardous area, and repeats the current accurately in another floating circuit to drive a load in the safe area. The 17.5V output (at 20mA) is more than sufficient for all normal transmitter loops, and the fact that it floats allows the field cables to be earthed, either intentionally or in error. The isolation of the safe-area circuit from the 24V dc supply allows systems to be wired without difficulty so as to eliminate measurement errors due to voltage drops in shared cables, and solves the problem of feeding control computers connected independently to earth as is sometimes demanded by their makers. The transformer-coupled circuit of the
MTL3041 chops the 4/20mA current directly, eliminating the need for any ‘high-stability’ resistors and ensuring extremely high long-term as well as short-term stability. For applications involving ‘smart’transmitters, use the MTL3046B.
MTL3000 series
Product CodeDescription
MTL3011 Switch/proximity detector relay - volt-free contacts
MTL3012 Switch/proximity detector relay - solid state
MTL3013 Switch/proximity detector relay - 2-channel
MTL3014 Switch/proximity detector relay - dual outputs
MTL3021_22 Solenoid/alarm driver ~ IIC loop powered
MTL3041 Repeater power supply - 4/20mA for 2-wire transmitters
MTL3042 DC isolator - 4/20mA loop powered for I/P converters
MTL3043 DC isolator - 1/40mA for fire and smoke detctors
MTL3045 Isolating driver - 4/20mA for I/P converters
MTL3046B Repeater power supply - for ‘smart’ transmitters
MTL3052 Digital isolator - for signals up to 10kHz
MTL3054 Communications isolator/ repeater
MTL3058_59 Serial data interface ~ RS232 general purpose
MTL3071 Temperature converter ~ THC or emf input
MTL3072 Temperature converter ~ 3-wire RTD input
MTL3073 Temperature converter ~ THC or RTD input
MTL3081 Millivolt isolator - for low-level inputs
MTL3099 Dummy isolator - for terminating and isolating unused cores
MTL3992 High stability power supply
