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COVER STORY ADVERTISEMENT FEATURE SATION MADE EASY
(WxHxD), they can be installed even in applications where space is at a premium. The units can be mounted via DIN-rail or in place using a variety of mounting holes. The FIEPOS product family has two
versions: The Basic series with one DC output which offers an optional integrated decoupling MOSFET for developing redundant power supply systems, and the eFused series with up to four current-limited DC outputs. FEIPOS simplify the delivery of selective
current distribution, protection and monitoring directly in the field, with no need for any further accessories, or costly, bulky enclosures. FIEPOS supplies are manufactured using a combination of modular boards, futureproofing them by allowing new functions to be added by simply integrating alternative boards as required.
SELECTIVE CURRENT DISTRIBUTION AND PROTECTION The eFused range of FIEPOS power supplies offer an alternative to power sources which are protected either by means of an external electronic four-channel protection module, four external fuses or circuit breakers. To deliver selective current distribution, the eFused versions can integrate up to four electronic fuses, allowing them to simultaneously supply electromechanical loads (e.g. motors) and sensitive loads such as controls or sensors, from a single decentralised and fused power supply.
WHAT HAPPENS IN THE EVENT OF A FAULT? If there is a short-circuit, the power supply selectively shuts down only the faulty output and reports this via the IO-Link or Output-OK signal and the LED interface on the front of the device. Due to active current limitation, all other outputs continue to be supplied with the proper voltage. This is particularly important in the case of sensitive and safety- critical loads such as PLCs or sensors.
PROTECTED LOAD BRANCHES Requirements can vary greatly from one application to another. For this reason, PULS has developed various circuit designs for the most common applications. The following pages show three possible configurations.
OPTION 1: TWO OUTPUTS - FOUR LOAD BRANCHES This configuration allows up to four separate load branches with two outputs each. For this requirement PULS offers three eFused models with an output power of either 300W or 500W. With these models, two separate electric
circuits per output can be achieved. This allows sensors and actuators to be independent of each other. If one sensor load branch fails due to a fault, the other three load branches continue to be supplied with power. The fault is indicated via IO-Link and the status LED on the front of the device. The communications and
FIEPOS switch-mode power supplies can be attached directly to the machine and replace complex, decentralised control cabinet
LED status allows maintenance to be performed quickly and efficiently. The tripped channel is reset using the pushbutton on the front of the device or alternatively, via IO-Link.
OPTION 2: THREE OUTPUTS - THREE LOAD BRANCHES These options provide up to three separate and individually protected load branches with one power supply for several sensors and actuators with power via each load branch. If a sensor connected to output 1 fails, the
electric circuit is open. All sensors and actuators connected to the faulty output are no longer supplied with power. The fault is indicated via IO- Link and the status LED on the front of the device. Outputs 2 and 3 remain unaffected by this fault,
and the power to these outputs is maintained.
OPTION 3: FOUR OUTPUTS - FOUR NEC CLASS 2 LOAD BRANCHES A power source with limited power may be necessary for applications installed in North America. For this reason, the maximum wattage of FIEPOS model FPT300.246-042-101 meets the NEC Class 2 requirements. Up to four load branches can be set directly on the front of the device or on the versions with integrated IO-Link interface, they can also be set remotely. In the case of an overload, the current is limited
to ensure that the maximum power of 100W defined for NEC Class 2 is not exceeded. The other NEC Class 2 load branches remain unaffected by the fault on the first output.
DECEMBER/JANUARY 2024 DESIGN SOLUTIONS 13
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