TDK-Lambda News

TDK Corporation (TSE 6762) announces the introduction of a ruggedised option to the GXE600 series of 600W rated programmable AC-DC power supplies. 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. These convection cooled 1U high products can be programmed digitally across a wide range using an RS-485 interface (Modbus RTU protocol) or with a 0‑6V external voltage. Target applications are harsh environment medical and industrial equipment requiring quiet operation, fan-less cooling with constant voltage and constant current programmability.<br /> <br /> The series is available with a 24V 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% and the current from 20 to 100%. Protection and recovery parameters can be set, as can the rise time slew rate. Via the digital communications interface, the power supplies can also indicate the estimated remaining electrolytic capacitor lifetime, operating run-time and alarm history to enable remote preventative maintenance indication or fault finding.<br /> <br /> To provide resistance to dust and dirt ingress, the printed circuit boards are selectively coated to prevent a build-up of contaminants from interfering with the operation of the supply. An optional cover (/HDA suffix) is also available to reduce the likelihood of accidental contact with the internal circuitry. Shock and vibration testing have been performed to MIL‑STD‑810G 516.7 Procedure I, VI and MIL-STD-810G 514.7 Category 4, 10.<br /> <br /> The power supplies operate from a wide-range input of 85 to 265Vac with an earth leakage current of &lt;300&micro;A and dual fuses as standard. They can be used in ambient temperatures of ‑20&deg;C to +70&deg;C (‑40&deg;C start up), derating linearly above 50&deg;C to 50% load at 70&deg;C. Derating or external cooling is required below 170Vac 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 GXE600/HD case dimensions are a compact 127 x 41 x 254mm (W x H x L) and 127.5 x 50 x 254mm for the /HDA cover version. The warranty period is seven years.<br /> <br /> Input to output isolation is 4,000Vac (2 x MoPP), input to ground 2,000Vac (1 x MoPP) and 1,500Vac output to ground (1 x MoPP) for suitability with B and BF rated medical equipment.&nbsp; 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.