N+1 Redundancy

Notes on parallel use for N + 1 redundancy Note that leakage current, EMI, input inrush current and harmonics increase when using multiple devices. The ambient temperature may not exceed +60 °C for N + 1 redundancy systems.

Redundancy systems for higher power requirements are usually set up using the N + 1 method. For example, four devices with a nominal current of 10 A are connected in parallel for a 30 A redundancy system.

• Keep a mounting distance of 15 mm (left/right) between two power supplies.
• Do not install the power supplies above each other.
• Do not use power supplies connected in parallel in an installation position that deviates from the standard installation position (connection terminals on the underside of the device) or in a different state requiring a reduction in the output current.

Wiring example:

Fig.26: Wiring for 1 + 1 redundancy and N + 1 redundancy