Power Supply

A high level of power supply filtering has been built into Certus to allow for reliable operation in demanding environments. However, a power supply with low noise and ripple levels, and adequate transient response is still recommended. Certus contains a fully isolated power supply and has separate grounds for power and signals to ensure that power supply noise does not corrupt communications or cause ground loops with other equipment. See Electrical Domains for more details about isolation.Certus contains a non-isolated power supply.

The power supply must be able to reliably provide the maximum current at the chosen voltage, especially in systems with substantial load variations. Make sure that all system components are rated (including safety factors) for the anticipated environmental operating conditions and stressors of the system. Refer to section Hardware Specifications for further information.

Certus contains an active protection circuit on the power supply input that protects the unit from under-voltage, over-voltage and reverse polarity events. It is recommended to always operate the unit at a voltage higher than the minimum mentioned in the Certus Electrical Specifications. Take caution when using a supply voltage close to the minimum voltage as minor voltage fluctuations could trigger under-voltage protection, leading to unexpected oscillations between the on and off states.

Note: Both connectors have a power supply connection. Only one of these power supplies should be connected. Connecting two different power supplies could result in damage to the unit.