Product Overview

The Allen-Bradley 1756-OG16 is a high-precision digital output module designed for the ControlLogix® platform, specifically engineered to interface with Transistor-Transistor Logic (TTL) devices. This module provides 16 isolated channels of 5V DC Low/True logic, making it the ideal solution for communicating with integrated circuits, specialized sensors, and high-speed laboratory instrumentation that require low-voltage digital signaling.

Operating within the high-performance ControlLogix backplane, the 1756-OG16 facilitates rapid data throughput and deterministic control. Its design focuses on signal integrity and high-speed switching, providing a critical bridge between standard PLC logic and the sensitive TTL-level electronic components used in advanced manufacturing and testing environments.

Signal Performance and Logic Characteristics

The 1756-OG16 is optimized for low-voltage precision, featuring specific timing and electrical properties for high-speed automated tasks.

• TTL Logic Compatibility: Delivers sixteen independent outputs with a voltage operating range of 4.5V to 5.5V DC, strictly adhering to TTL "Low/True" logic standards.

• High-Speed Switching: Features ultra-low latency with an OFF-to-ON signal delay of 450µs and an ON-to-OFF transition of 700µs, supporting high-frequency pulse requirements.

• Current Handling: Each point supports a maximum load current of 24mA, with a total module capacity of 384mA across all 16 channels, ensuring stable power delivery to connected logic gates.

• Low On-State Impedance: Minimizes signal degradation with a maximum ON-state voltage drop of only 0.4V, preserving the logic-level threshold for downstream receivers.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1756-OG16

• Module Type: Digital Transistor Logic (TTL) Output

• Number of Points: 16 (Sinking/Sourcing dependent on configuration)

• Output Voltage: 5V DC (Nominal)

• Backplane Current Draw: 210mA @ 5.1V DC; 2mA @ 24V DC

• Total Power Dissipation: 1.5 Watts

• Thermal Dissipation: 5.2 BTU/hr

• Isolation Voltage: Tested at 250V continuous between outputs and backplane

• Environmental Rating: 0°C to 60°C (32°F to 140°F) operating range

• Dimensions: 3.5 x 14.0 x 14.5 cm

• Weight: 0.2 kg (0.44 lbs)

Industrial Durability and Compliance

• Rugged Construction: Rated for 30G operational shock and 2.0G vibration (10–500Hz), ensuring performance in heavy industrial vibrating environments.

• Advanced Certification: Fully CE and UL certified, meeting North American T5 temperature codes and CISPR 11 Class A emissions standards for low electromagnetic interference.

• Chassis Integration: Occupies a single slot in any standard 1756 ControlLogix chassis and supports Removal and Insertion Under Power (RIUP) for simplified maintenance.

• Fault Detection: Compatible with standard Studio 5000 Logix Designer® diagnostics for real-time monitoring of module health and network connectivity status.