The MTL4041B provides a fully floating dc supply for energizing a conventional 2- or 3-wire 4/20mA transmitter or a ‘smart’ transmitter located in a hazardous area, and repeats the current in another
circuit to drive a safe-area load. For smart transmitters, the unit allows bi-directional transmission of digital communication signals
superimposed on the 4/20mA signal so that the transmitter can be interrogated either from the operator station or by a hand-held communicator (HHC). The module can also be used with hazardous area
current sources and some vortex and turbine meters.

Power requirement:

– – 65mA at 24V dc

– – 75mA at 20V dc

– – 50mA at 35V dc with 20mA signal

Power dissipation within unit

– – 1.2W at 24V with 20mA signal

– – 1.4W at 35V

Isolation

– – 250V ac between safe- and hazardous-area circuits