AC/DC power supplies use digital comms interface for remote maintenance
Power supplies from TDK-Lambda, the GXE600 series of 600W AC/DC power supplies medical use a digital communications interface to indicate the estimated remaining electrolytic capacitor lifetime, operating runtime and alarm history to enable remote preventative maintenance indication or fault finding.
The GXE600 series are programmable, convection-cooled, 600W AC/DC power supplies with industrial and medical safety certifications IEC 60601-1 medical safety standard as well as IEC 62368-1.
The supplies are delivered in a 1U high package and can be digitally programmed across a wide range using an RS-485 interface (Modbus RTU protocol) or with a 0 to 6V external voltage. Target applications are medical, industrial and test equipment requiring quiet operation, fan-less cooling and constant voltage, constant current programmability.
The GXE600 series can be operated as a 24 or 48V fixed output supply, or programmed to be provide a constant voltage, constant current (CVCC) source. The voltage adjustment range is from 20 to 120 per cent and the current from 20 to 100 per cent. Protection and recovery parameters can be set, as can the rise time slew rate.
The power supplies operate from a wide-range input of 85 to 265V AC with an earth leakage current of less than 300 microA and dual input fuses as standard. The GXE600 series can be used in ambient temperatures of -20 to +70 degrees C (-40 degrees C start up), derating linearly above 50 degrees C to 50 per cent load at 70 degrees C. Derating or external cooling is required below 170V AC input.
The fully featured series also has an isolated 5V 1A standby voltage, remote on/off, ‘DC good’ and ‘AC fail’ isolated signals, with paralleling capability for up to five units.
The case dimensions are a compact 127 x 41 x 254mm. The series is covered by a warranty period of seven years.
The units are safety certified to IEC/EN/ES/CSA 60601-1, IEC/EN/US/CSA 62368-1, IEC/EN/US/CSA 60950-1, EN 62477-1 (OVC III), with CE marking for the Low Voltage, EMC and RoHS2 Directives. Input to output isolation is 4,000V AC (2 x MoPP), input to ground 2,000V AC (1 x MoPP) and 1,500V AC output to ground (1 x MoPP) for suitability with B and BF rated equipment. The units also comply with EN 55011-B, EN 55032-B, FCC Class B, VCCI-B conducted and radiated emissions, meet the EN 61000-3-2 harmonics and EN 60601-1-2 (Edition 4) immunity standards.
