RECOM is pleased to announce the RACPRO1-4SP series, a new range of four-channel electronic fuses with advanced control and protection features.

Jan 22, 2025

Following the introduction of the pioneering RACPRO1-T series of DIN-rail power supplies, RECOM is launching the new RACPRO1-4SP series of four-channel electronic fuses in a matching DIN-rail format.

The RECOM e-Fuses distribute a 24V supply voltage to four separately current limited load channels, each with a capacity of either 5A or 10A, depending on the module chosen. To avoid high inrush currents, each load channel is switched on in succession with a programmed delay. The integrated soft-start function allows the loads to be switched on and off during operation (hot-swap and hot-plug compatible).

An under-voltage lockout (UVLO) with hysteresis prevents problems caused by supply voltage dips at startup or under heavy loading and increases the reliability of the overall system. Each channel delivers 150% of the maximum rated current for up to 5 seconds to handle high inductive or capacitive startup currents without nuisance tripping.

In the event of system overload, the channels are disconnected one after the other, with the most important load remaining prioritized until the last. During a sustained short circuit or an overload that lasts longer than 5 seconds, the electronic fuse safely disconnects the respective load without affecting the other channels. This OCP can be switched to auto-recovery or latching mode.

Thanks to smooth output voltage control, each channel can safely ramp up to the set nominal current against very high capacitive loads of up to 20mF. Each channel can also be enabled or disabled for maintenance or troubleshooting, with a key lock function to prevent accidental disconnection of the load during operation. Paired input terminals and separate (+, -) load terminals allow for easy daisy-chaining and load wiring without additional terminal blocks. Several e-Fuse modules can also be connected onto the same power supply to create more complex systems with each load individually monitored and protected.

The DC-oK volt-free relay connection reports the proper function of the module to a central controller and the remote reset enables targeted restarting after any faults have been cleared. The RACPRO1-4SP e-Fuses thus offer easy integration into standard programmable logic controllers (PLC) and SCADA systems.

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