| High-quality input stage  permits processing of small voltages and currents directly at the differential input stage. This can be wired inverting or non-inverting, integrating, summing etc., i.e. no additional pre-amplifier is required.  |  | External power supply:  The supply to the amplifier is made visible by two green LED displays. If one of the UB - / UB + fuses fails, the corresponding display goes out and an error message is sent via RDY (ready).  |  | A short circuit-proof output stage  permits output stage type A to deliver the maximum output current without time limitations but without surge current. In addition, it supplies Type B with threefold peak current over 40ms or Type C with double peak current over a time constant of 160ms. Other values are also possible by arrangement.  |