Detailed Answer
A fuse is an overcurrent protection component: when current exceeds the limit, it blows and cuts the circuit, protecting the equipment. Industrial remote receivers have fuses in both the power input and relay output circuits. Leader LD series receivers have built-in replaceable fuses; Xingjia likewise. A blown fuse indicates a short circuit/overload downstream; fix the fault first, then replace with a fuse of the same rating.
| Function | Overcurrent protection |
| Position | Power / output circuits |
| Replacement | Same rating |
Note:If fuses blow repeatedly, troubleshoot the fault first; do not blindly fit a larger rating.