Beckhoff PS9xxx buffer and redundancy modules

The PS9xxx supplementary modules for the PS power supply series from Beckhoff include buffer modules and redundancy modules.

The buffer modules prevent disturbances caused by voltage dips and fluctuations in the electrical grid or by peak loads, so that the power supply units and connected loads can operate without failure. They store energy via maintenance-free electrolytic capacitors and release it as required.

The buffer modules require no control wiring; they can be added in parallel to the load circuit at any point. In addition, multiple modules can be connected in parallel to provide more power or further increase the power failure bridging time.

The redundancy modules create a redundant fail-safe supply network. In such a system, two or more power supply units are connected in parallel and decoupled by one or more redundancy modules. This prevents an output-side short circuit in one of the power supplies from short-circuiting the output voltage.

The redundancy modules use efficient MOSFET technology for decoupling, which reduces voltage drops and thus power dissipation. Accordingly, the devices should have lower power loss compared to conventional diode modules.