The MA-21 is used for applications where equipment requires a 20 mA current loop interface: for example with cash register systems and some PLC-systems. The MA-21 converts 20 mA current loop to RS-232/V.24. The units can be used in point to point applications and also for ring connection with a maximum of 6 nodes. The converter can be switched to active as a current source or to passive, depending upon the configuration of the connected equipment. The maximum transmission rate of the MA-21 is
19 200 bit/s.        

    Conversion between 20mA and
RS-232/V.24 interface
    Protects connected units from lightning/transients
    Total galvanic isolation
    Data transparent
    Use to connect equipment on different earth potentials
    Guarantees reliable long-distance communication