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 150 Vdc. Voltages with a potential higher than 60 Vdc are no longer regarded as safety extra-low voltage 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 voltages is more than 60 Vdc.
• Avoid application of return voltage (e.g., from a braking motor or battery) to the output terminals.

Restrictions:

• Maintain an installation distance of 15 mm (left/right) between two power supplies.
• Do not install the power supplies above each other.
• Power supplies connected in series should only be used in the standard installation position (terminals on the underside of the device).
• Note that leakage current, electromagnetic interference, input inrush current, and harmonics increase when using multiple power supplies.