Mt3021 Manual – Free

For high-vibration environments, set SW1-4 to ON to enable “Switch debounce” mode (filter time = 50 ms). Without this, false triggers may occur.

| Connection | Recommended Cable | Max Length | Notes | |------------|-------------------|------------|-------| | Input L1‑L3 | 4 mm² (copper) THHN | 30 m (single‑phase) | Fuse per phase (10 % above rated current) | | Input Earth | 2.5 mm² green/yellow | 30 m | Continuous connection to earth bar | | Output U‑V‑W | 6 mm² (copper) for 22 kW | 15 m | Use twisted pair, shielded for high‑frequency noise | | Control (Modbus‑RTU) | 0.6 mm² stranded | 100 m | Terminate with 120 Ω at each end | | CANopen | 0.5 mm² twisted pair | 40 m | 120 Ω termination at both ends | mt3021 manual