600W medical power supply meets MIL-STD-810G shock and vibration

September 02, 2019 //By Nick Flaherty
TDK-Lambda's GXE600 600W medical power supply meets MIL-STD-810G shock and vibration
TDK's GXE600 series of 600W rated programmable AC-DC power supplies adds MIL‑STD‑810G shock and vibration option. 

TDK has launched a ruggedised option for its GXE600 series of 600W rated programmable AC-DC power supplies with high levels of shock and vibration protection to the MIL‑STD‑810G standard. 

The GXE600/HD is also safety certified to both the IEC 60601-1 medical and IEC 62368-1 industrial standards. The convection cooled 1U high products can be programmed digitally across a wide range using an RS-485 interface with the 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.

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.

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.

The power supplies operate from a wide-range input of 85 to 265Vac with an earth leakage current of <300µA and dual fuses as standard. They can be used in ambient temperatures of ‑20°C to +70°C (‑40°C start up), derating linearly above 50°C to 50% load at 70°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. 

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