Detailed Answer
Relay output is how the receiver outputs control signals: after decoding commands, the receiver drives internal relays to pick up/release, controlling external loads (contactors, solenoid valves, indicator lights) through the contacts (dry contacts). Leader LD series receivers output 8-12 relay channels (matching button count), contact rating 5A/250VAC. Relay output isolates internal circuits from external power, making it safe and reliable.
| Principle | Contact switching |
| Contact rating | 5A/250VAC |
| Leader | 8-12 channels |
Note:Relay contacts can only carry small currents; motors and other heavy loads must go through contactors.