Decision Logger

The Decision Logger is a critical sub-component of Permission Validator systems that captures, timestamps, and stores detailed records of every access control decision made by the system. It logs both granted and denied permission requests, including user identity, requested resource, action attempted, decision outcome, and relevant contextual data. This creates an auditable trail for security compliance, forensic analysis, and system optimization. The logger is designed for industrial environments, with a wide operating temperature range of -40 to 85 °C and storage temperature of -40 to 105 °C, and relative humidity of 5 to 95% non-condensing. It offers an ingress protection rating of IP54 to IP65, ensuring dust-tight and water-resistant operation. The device operates on a supply voltage of 9 to 36 V DC with a typical power consumption of ≤5 W at 24 V DC. It supports communication via RS-485 or Ethernet using Modbus TCP/RTU, conforming to IEC 61158. The logging capacity ranges from 10,000 to 100,000 entries, with a sustained logging rate of 10 to 100 entries per second. Timestamp accuracy is ±0.1 seconds, synchronized via PTP per IEC 61588. Data is stored in non-volatile flash memory, retaining data for 10 years. The unit is DIN rail mountable with dimensions of 100×75×30 mm and weighs between 0.5 and 1.0 kg depending on configuration. The Decision Logger operates by intercepting decision signals from the Permission Validator's core logic, capturing input parameters, processing them through a standardized formatting module, adding metadata such as timestamp, session ID, and system state, and writing the complete record to a secure storage medium. It includes buffering mechanisms for performance and compression for storage efficiency. This component is essential for maintaining a comprehensive audit trail in access control systems, supporting compliance and forensic analysis. For specific model details, always verify with the manufacturer.

The Decision Logger operates by intercepting decision signals from the Permission Validator's core logic. When a permission check occurs, it captures the input parameters, processes them through a standardized formatting module, adds metadata (timestamp, session ID, system state), and writes the complete record to a secure storage medium (database, log file, or event stream). It typically includes buffering mechanisms for performance and compression for storage efficiency.