Deskripsi
Main Control Board
• Type: Intelligent actuator control board
• Model: SND‑QDT
• Brand: Changzhou Power Plant Auxiliary Equipment Factory Co., Ltd.
Product Overview:
The SND‑QDT is a main control board used in SND-series intelligent electric actuators. It serves as the central logic and relay interface for motor control, signal processing, and protection functions. This board is engineered for demanding environments such as power plants, water treatment facilities, and petrochemical systems, where precise valve control and fault tolerance are critical.
Specifications (typical for SND‑QDT boards):
| Feature | Specification |
|---|---|
| Supply Voltage | 24 VDC logic (motor drive via external contactors) |
| Control Inputs | Open, Close, Stop, Remote/Local, Interlock |
| Feedback Inputs | Limit switches, torque switches, position potentiometer or encoder |
| Relay Outputs | Motor forward/reverse, alarm, status |
| Communication | RS‑485 / Modbus RTU (optional) |
| Protection Functions | Over‑torque, over‑travel, phase loss, phase sequence error |
| Display Interface | Compatible with TP400‑D series LCD panels |
| Operating Temperature | −25 °C to +70 °C |
| Humidity | ≤95% RH (non‑condensing) |
| PCB Material | FR4 industrial grade |
| Mounting | Inside actuator enclosure or control cabinet |
Dimensions & Weight:
- Size: Approx. 180 × 140 × 35 mm
- Weight: ~350–450 g
Applications:
- Multi-turn and quarter-turn electric actuators
- Power plant valve control systems
- Water treatment and pumping stations
- Petrochemical and refinery automation
- HVAC and industrial ventilation systems
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