MTL3043 DC ISOLATOR, 1/40mA for fire and smoke detectors.

The MTL3043 is similar in principle to the MTL3042, but with a higher current range for use primarily with fire and smoke detectors or similar high integrity switched-resistor systems. In these applications the unit shows, by a change in the safe-area current, when one of the detectors across the 2-wire circuit in a hazardous area has been triggered. With a suitable receiving instrument in use, line short circuits do not give a false alarm and – if an end-of-line resistor is added to the system – open circuits do not give the operator a false sense of security. Further, the isolation feature eliminates the multiple earths that can arise in conventional barrier systems when the supply is earthed, and permits earth faults in field wiring to be detected and cured while the unit continues working.

MTL3000 series

Product Code Description

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