380ms hold up for 12V, 15V or 24V AC-DC converters

February 18, 2021 //By Nick Flaherty
380ms hold up for 12V, 15V or 24V AC-DC converters
The ZBM20 open frame buffer from TDK provides 380ms extra power to allow AC-DC converters in sensitive equipment to shut down properly

TDK has launched an open frame buffer module with the capability to provide 380ms additional hold-up for 12V, 15V and 24V AC-DC converters.

The extended hold-up time from the ZBM20 allows equipment to safely shutdown and avoid data loss in applications such as industrial automation, robotics and semiconductor fabrication equipment.

To avoid unsafe discharge of stored energy, the remote on/off function can be used to inhibit the output. For remote monitoring, a DC OK relay and photo-coupled signals indicate the readiness status of the product. Multiple modules can be paralleled for longer buffer times. The hold-up energy is stored in electrolytic capacitors rather than batteries to remove the need for servicing and maintenance. On the 24V output model a switch can be used to select either fixed or variable voltage buffer levels. In fixed mode it will provide power when the input voltage drops to 22.4V, in variable mode when the input decreases by 1V.

The ZBM20 modules measure 175 x 85 x 57 mm (L x W x H), and will operate in ambient temperatures of -25°C to +70°C. The module has protection against both input overvoltage and overcurrent conditions. Inrush current reduction and internal fuses are also provided. Safety certification includes IEC/UL/CSA/EN 62368-1 with CE marking to the Low Voltage, EMC and RoHS Directives.

www.emea.lambda.tdk.com/zbm

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