600W programmable power supplies meet MIL-STD-810G
A ruggedised option to the GXE600 series of 600W-rated, programmable AC/DC power supplies has been introduced by TDK-Lambda. The GXE600/HD meets MIL‑STD‑810G shock and vibration and is safety certified to both the IEC 60601-1 medical and IEC 62368-1 industrial standards.
The convection cooled 1U high power supplies can be programmed digitally across a wide range using an RS-485 interface (Modbus RTU protocol) or with a 0 to 6V external voltage. The power supplies can be used for harsh environment medical and industrial equipment requiring quiet operation, fan-less cooling with constant voltage and constant current programmability.
The series is available with a 24 or 48V nominal output supply and can be programmed to 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, advises TDK-Lambda. The digital communications interface can be used to indicate the estimated remaining electrolytic capacitor lifetime, operating run-time and alarm history. In this way, it can enable remote preventative maintenance indication or fault finding.
To provide resistance to dust and dirt ingress, the PCBs are selectively coated to prevent a build-up of contaminants from interfering with the operation of the supply. An optional cover is also available.
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 fuses as standard. They 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 GXE600 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.
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 medical 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.
The GXE600/HD case dimensions are 127 x 41 x 254mm and 127.5 x 50 x 254mm for the version with a cover. The warranty period is seven years.