The manual describes the features, specifications, wiring, adjustment and troubleshooting of the DLJ-7 mid‑frequency thyristor control board by Xi'an…
The DLJ-7 control board is a mid‑frequency thyristor power‑supply controller designed for heating furnace applications operating between 1000 Hz and 10 kHz. It provides simple adjustment with three potentiometers, robust fault protection, and interchangeable modules for different frequency loads.
The document covers product overview, technical specifications, circuit principle, terminal connections, LED indicator meanings, DIP switch functions, potentiometer settings, debugging procedures, safety precautions, and troubleshooting tips. This manual is written in Chinese.
| Input voltage | 100 V~380 V (50 Hz) |
|---|---|
| Control supply voltage | Single‑phase 17 V / 3 A |
| Mid‑frequency voltage feedback | AC 15 V / 15 mA |
| Current feedback signal | AC 15 V / 5 mA (three‑phase input) |
| Rectifier trigger pulse phase‑shift range | α = 0°~130° |
| Rectifier trigger pulse width | ≥ 600 µs, double narrow, interval 60° |
| Inversion frequency range | 1000 Hz~10 kHz |
| Maximum dimensions | 260 mm × 190 mm × 40 mm |
It is suitable for devices operating from 1000 Hz to 10 kHz.
The board has three potentiometers: W1 for voltage limit, W2 for current limit, and W3 for inversion lead angle.