1. Model & Brand

• Brand: Reliance Electric

• Model: 0-52821

• Alias: RPOA Control Card, DFSA Digital Trigger Board, Drive System Circuit Board

2. Product Category

3. Basic Information

• Manufacturer: Reliance Electric, USA

• Production Status: Discontinued, only refurbished & used goods available

• Installation Type: Standard industrial rack mounting

• Structure: Single circuit board with fixed panel and screw terminal block

4. Function & Positioning

• Core Function: Realize digital trigger signal output, system sequence control, voltage protection and signal conditioning, receive serial data signal and complete operating status monitoring.

• Product Positioning: Core control component for AC & DC industrial drive systems, applied to high-power speed regulation drive equipment.

5. Core Performance Parameters

• Working Power Supply: 115 VAC main power, ± auxiliary power supply

• Signal Interface: Serial data input interface

• Indicator Light: Dual LED status indicators for power and data signal

• Working Level: Industrial grade, strong anti-interference, suitable for harsh industrial environment

6. Universal Matching Accessories

• Matching industrial drive rack

• Special screw terminal block with dustproof cover

• Shielded twisted pair signal cable

• Special power connecting wire

• Compatible replacement control board accessories

7. Applicable Equipment & Fields

• Industrial frequency converter and DC speed regulator supporting equipment

• Factory assembly line, conveyor drive system

• Metallurgical rolling mill, mechanical transmission industrial control equipment

• Traditional large-scale industrial automation drive control system