Analog signals from hazardous areas often need conditioning, scaling and isolation before they reach the control system. PMT50Ex-1 converts intrinsically safe 0/4..20 mA and 0/2..10 V DC inputs into isolated 0/4..20 mA or 0/2..10 V DC outputs, with ATEX approval for input circuits.
The programmable measuring range and 32-point linearization help adapt non-linear sensor behavior to a usable process value. Programming is carried out with front buttons and the graphic LCD, while the Teach In function can store start, end and characteristic curve values automatically when the input signal is present.
For monitoring and fault handling, the device offers 2 SPDT relay outputs with min. or max. functions and delay times from 1 s to 9 h. The integrated intrinsically safe 16 V DC transmitter supply powers 2- and 3-wire transmitters up to 20 mA, and wire break detection can set defined analog output and relay behavior.
The device accepts 0/4..20 mA and 0/2..10 V DC standard signals via the Ex-approved input circuit.
The analog output provides 0/4..20 mA or 0/2..10 V DC and changes automatically depending on burden.
Parameters are set using front buttons together with the graphic 128 x 64 pixel LCD.
Start value, end value and characteristic curve values can be stored from the applied input signal.
Two SPDT relay outputs can be configured for monitoring and controlling as min. or max. functions.
Break of wire in the measuring circuit is detected and can trigger programmable analog output and alarm relay behavior.
