RELIANCE DASR-6 MD-B7005C Dynamic Braking Resistor Module

RELIANCE (Ryan) DASR-6 MD-B7005C Dynamic Braking Resistor Module
I. Brand and Model Definitions
Brand: Reliance Electric (now part of Emerson Industrial Drive System)
DASR-6: Standard specification of 6kW rated power dynamic braking resistor in the DASR series
MD-B7005C: Original factory complete material order number. C represents the hardware version. It is equipped with a dedicated braking component for Ryan’s DAS AC servo drive system. There are derivative versions such as B/D in the same series.

Core Electrical Parameters
Continuous rated braking power: 6kW
Applicable bus voltage: 460V three-phase AC drive (DC bus approximately 700VDC under standard working conditions)
Resistor core: Alloy corrugated winding resistor, low inductance, capable of withstanding large current in shock
Short-term peak energy consumption: Can withstand 10 times the rated power short-term impact (emergency stop, large inertia deceleration)
Accuracy tolerance: Resistance value ±5%
Insulation withstand voltage: 500VAC for 1 minute without breakdown

Structure and Safety Protection
Heat dissipation structure
Aluminum alloy extruded integrated heat dissipation base, increased heat dissipation area; natural air cooling, axial flow fan can be added for enhanced cooling in high-frequency braking conditions
Built-in overheat protection
Standardly equipped with a normally closed temperature control switch. When the temperature exceeds the limit, it automatically cuts off the braking circuit to prevent damage to the driver and the resistor body
Connection terminals
Large current bolt terminals, high-temperature resistant Teflon lead wires, resistant to vibration and large impact current Protection level
IP20, suitable only for sealed installation within the control cabinet; the entire machine is coated with moisture-proof and anti-corrosion layers.

Matching Drive System
Specifically matched with Ryan DAS series high-performance AC servo drives, suitable for high-power servo motors:
Applicable models: DASR series servo controllers (equivalent hardware platform: MD-B7005C/D)
Working logic: When the motor decelerates and releases potential energy, it generates regenerative electrical energy. The resistor converts the electrical energy into heat energy for consumption, stabilizing the DC bus voltage, eliminating drive OV overvoltage faults, and improving braking torque and positioning accuracy.

Typical Application Scenarios
Heavy-duty CNC gantry, main shaft/feed servo of large machining centers
Lifting and lowering, hoisting, parking garage potential energy load equipment
Automated heavy-duty truss robots, seventh-axis walking mechanism
Roll material storage, stamping, forging high-frequency start-stop servo production lines
High-power transmission equipment in petroleum, metallurgy, and papermaking industries