Series connection

Power supplies of the same type can be connected in series to increase the output voltages. As many devices can be connected in series as necessary, as long as the sum of the output voltages does not exceed 150Vdc. Voltages with a potential above 60Vdc are no longer defined as safety extra-low voltage (SELV) and can be dangerous. Such voltages must be protected with a contact hazard protection.

Grounding of the output is required if the sum of the output voltage exceeds 60Vdc.

Avoid application of return voltage (e.g., from a braking motor or battery) to the output terminals.

Keep an mounting distance of 15 mm (left / right) between two power supplies and avoid installing the power supplies on top of each other.

Remember that leakage current, electromagnetic interference, input inrush current and harmonics increase when using multiple power supplies.