A-B 1769-SDNThe 1769-SDN module is a high-performance secure digital input module manufactured by Rockwell Automation (formerly Allen-Bradley) for the CompactLogix 5370 controller. It is mainly used to collect safety-related digital signals and transmit them to the controller to achieve safety control functions.
Product description
Features:

Safety signal collection: Collect safety signals from safety sensors, emergency stop buttons and other devices.
Safety level: Provides safety integrity of SIL 3 level to meet the application requirements of high safety level.
Diagnosis function: Provides rich diagnosis functions to facilitate fault diagnosis.
Features:
High performance: Fast response speed and timely processing of security signals.
Modular design: easy installation and maintenance.
Flexible configuration: Supports multiple configuration modes to meet different application requirements.
Product parameters and specifications (typical values, refer to the product data manual)

Input type: Secure digital input
Input points: varies according to the model
Safety level: SIL 3
Response time: Very short
Operating temperature: 0°C to 60°C
Protection level: Depending on the specific model and application environment
Size: Meets the standard size of the CompactLogix 5370 chassis