POWER FRONT COVER FEATURE
demanding start-up cycle. With a housing size of only 182 x 183 x 57mm (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 (Figure 2) 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 that 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. If there’s 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, and there are several possible configurations:
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
Figure 2: FIEPOS switch-mode power supplies can be attached directly to the machine and replace complex, decentralized control cabinets
> 8 / DESIGNSOLUTIONS DESIGN SOLUTIONS | APRIL 2021 7
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