source:Industry News Popular:adapter release time:2021-08-18 14:37:12 Article author:sznbone
How to Pick Reliable Power Supplies? (2)
Failure proof
Systems where reliability is essential and a sudden loss of power would lead to disaster need two bulletproof power sources.
One way to keep dc power going no matter what is to use a redundant power supply system. In a redundant arrangement, more than one power supply feeds a single voltage rail. If one power supply fails, the other continues to entirely power that rail. Furthermore, a separate feed to each power supply input helps stem failure on the primary side.
Redundant power entails more than simply paralleling the outputs of multiple power supplies. (In general, power supplies may not be built to work in parallel with other supplies. Simple parallel power connections can sometimes damage the paralleled supplies.) Instead, redundant power packages contain two identical power supplies with their outputs interconnected through a diode switching arrangement. The switching arrangement will detect any fault condition, isolate it from the system output, and pass only the output of the good supply with no interruption of output power during the transition. Redundant power systems come with various features including over- and undervoltage, surge protection, isolation diodes, alarms and remote voltage sensing！
Power supplies that can be mounted on a DIN rail are frequently utilized in control panels and electrical cabinets for industrial control, building control, instrumentation and automation applications. Control systems typically have functional modules clipped to DIN rails for operational flexibility and easy access. These DIN-rail power supplies provide industry standard 12, 24 or 48 Vdc. Application requirements often dictate that these supplies withstand harsh environmental conditions.
Many power supply manufacturers provide simple DIN rail mounting kits for many of their power supplies. For instance the EB35DIN mounting kit from Acopian includes an aluminum plate with two DIN clips attached to it. Four screws attach the plate to the bottom of any mini-encapsulated power supply or mini dc-dc converter with screw terminals. The power supply can then be snapped onto a 35-mm ‘top hat’ type DIN rail.
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