. Its primary function is to convert AC supply voltage into a DC signal to operate the electromagnetic brake of a motor. Radwell International Technical Specifications Input Voltage AC 200V – 690V Output Voltage DC 90V – 310V (approx. 0.45 x Input) Current Rating Half-wave Rectifier Blue Plastic Installation and Safety Guidelines Based on standard procedures for this rectifier module: Verification:
Before handling or replacing the unit, ensure your specific machinery matches the operational criteria of the module.
While the motor undergoes rapid stopping, the transient voltage should remain safe. A properly functioning module restricts peak voltage fluctuations to a tight range, generally under 105% of the system nominal target , effectively eliminating the large 145%+ overvoltage waves that trip automatic safety switches. Troubleshooting Guide & Common Fixes Symptom / Fault Potential Root Cause Diagnostic Action Recommended Resolution
The is a critical, heavy-duty industrial control component designed to regulate, rectify, and manage dynamic braking energy in heavy-lifting and material handling hardware . Commonly integrated into industrial machinery systems engineered by major brands like Konecranes , R&M Materials Handling, and SWF, this bridge rectifier module controls electronic brake releases for overhead cranes, hoists, elevators, and automated escalators. This comprehensive technical manual serves as an operator’s guide to understanding the device's technical specifications, mechanical installation, electrical wiring, operational safety, and field troubleshooting. Technical Specifications & Performance Ratings
While variations exist based on the specific crane or elevator hoist OEM architecture, the REC12-690+DC generally utilizes a standardized pin configuration: Terminal Designation Function Description Connection Point Incoming AC Power Input Main control transformer or motor terminal box lines AC / ~ Incoming AC Power Input Second leg of the AC power supply + (Plus) Positive DC Output Electromagnetic brake coil positive terminal - (Minus) Negative DC Output Electromagnetic brake coil negative terminal Brake / Switch Control Rapid Interruption Circuit rec12-690 dc manual
Proper wiring is crucial for the safe operation of the REC12‑690+DC. Always disconnect the motor from the main power supply before beginning any work.
: IP20, meaning it is protected against large solid objects but requires an enclosed cabinet to prevent dust or water ingress. 2. Functionality and Use Cases The module serves two primary roles in power systems:
The is a high-performance rectifier brake module widely used in heavy-duty industrial machinery, particularly for Konecranes , Cummins , and elevator systems . Its primary role is to convert AC from stator windings into DC to provide stable power for braking mechanisms, ensuring controlled and safe deceleration.
: The module usually features terminals for AC input (often labeled L1, L2) and DC output for the brake coil. Troubleshooting Guide & Common Fixes Symptom / Fault
: When the motor contactor closes, AC voltage flows into the REC12-690+DC. The module converts it to DC, energizing the brake coil. The magnetic field pulls the brake pads away from the rotor, allowing the motor to spin freely.
The module is engineered to withstand severe electrical transients and mechanical stress common to heavy lifting, crane cross-traveling, and industrial generator load shedding .
+-----------------------------------------+ | REC12-690+DC | | Rectifier Brake Module | +-----------------------------------------+ [ F+ ] [ F- ] [ B+ ] [ B- ] | | | | | | | | v v v v Motor Rotor Field Braking Resistor Circuit Windings (Active DC) Terminal Descriptions
Connects positive to negative to increase voltage (e.g., two 12V units for a 24V system). energizing the brake coil.
• Short circuit in downstream load• Ground fault in the output cabling
Loose connection bolts or poor contact with the backplate enclosure.
REC12-690+DC (Alternative Part/Cross-reference: 60010145 / 1601038133857) Category: Semiconductors / Bridge Rectifiers