New DIN-rail smart protection modules offer advanced control and protection

RECOM has announced the RACPRO1-4SP series, a new range of four-channel electronic fuses with advanced control and protection features.

Following the introduction of the pioneering RACPRO1-T series of DIN-rail power supplies, the company launched a new series of four-channel electronic fuses in a matching DIN-rail format.

The company 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. Each load channel is switched on in succession with a programmed delay to avoid high inrush currents. The integrated soft-start function permits the loads to be switched on and off during operation (hot-swap and hot-plug compatible).

A UVLO with hysteresis prevents problems caused by supply voltage dips at startup or under heavy loading and increases the overall system's reliability.

Each channel delivers 150% of the maximum rated current for up to five 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 prioritised until the last. During a sustained short circuit or an overload that lasts longer than five 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 stop accidental disconnection of the load during operation.

Paired input terminals and separate (+, -) load terminals permit easy daisy-chaining and load wiring without extra terminal blocks. Several e-fuse modules can also be connected to 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 module's proper function to a central controller, and the remote reset enables targeted restarting after any faults have been cleared. Therefore, the RACPRO1-4SP e-fuses offer easy integration into standard PLC and SCADA systems.

A three-year warranty covers the components.