Parameters Category Parameter Specification / Interpretation for 3HNA027103-002 General Part Type Robot Axis Motor Brake Release Unit / Module Compatible Robot Series IRB 6600 (Primary), potentially other large ABB robots. Controlled Axes Likely Axes 1, 2, and 3 (or a similar primary axis group). Electrical Input Control Input Signals Two independent, safe digital signals from the robot controller's safety board (e.g., BR1 and BR2). Input Voltage (Logic) Typically 24 V DC (sourced from the drive module's internal supply). Electrical Output Output to Brake Coils High Voltage DC: Commonly 90 V DC (for the specific motor brakes used in IRB 6600). Output Current Inrush Current: Several Amperes per brake. Holding Current: Lower, regulated current. Number of Output Channels 3 channels (one for each brake coil of axes 1, 2, and 3). Safety & Monitoring Safety Standard Designed to meet Performance Level d (PLd) / Category 3 per ISO 13849-1, as part of the robot's overall safety system. Fault Detection Monitors for open circuit, short circuit, and feedback mismatch on the brake release circuits. Fail-Safe State De-energized (Brakes ENGAGED/LOCKED). Physical & Integration Form Factor Printed Circuit Board (PCB) assembly designed to plug into or mount within a specific drive module chassis. Mounting Location Inside the robot's Drive Module (e.g., a module in the IRC5 controller cabinet). Environmental Operating Temperature 0°C to +55°C (Standard for electronics inside controller cabinet). Storage Temperature -25°C to +70°C