Overview
The Allen-Bradley 1756-IG16 is a TTL digital input module designed for the ControlLogix 1756 chassis-based control system. This 16-point 5VDC module provides reliable digital input acquisition with TTL (low-true) logic levels, making it suitable for sensors and discrete signal sources operating in the 0–5V range. The module features integrated diagnostic capabilities and operates from 0°C to 60°C, supporting demanding industrial automation and motion control applications.
Key Features
- 16 digital inputs, TTL logic (low-true, 0–5V DC range)
- Operating voltage: 4.5–5.5V DC with maximum 50 mV peak-to-peak ripple
- Low-true input sensitivity: −0.2 to 0.8V = ON state
- Input current: 3.7 mA nominal at 5V DC (4.1 mA maximum)
- Module power consumption: 1.4 W at 60°C
- 8 inputs per isolated group for flexible signal routing
- Integrated input and communication status indicators
- 20-pin removable terminal block connection
Technical Specifications
- Module Type: Digital Input (TTL)
- Input Points: 16
- Input Voltage Range: 0–5V DC (TTL)
- Operating Voltage: 4.5–5.5V DC
- Ripple: Maximum 50 mV P-P
- Input Current: 3.7 mA nominal at 5V DC; 4.1 mA maximum
- Module Current Draw: 110 mA at 5.1V, 2 mA at 24V
- Power Consumption: 1.4 W at 60°C
- Operating Temperature: 0°C to 60°C
- Mounting Type: ControlLogix 1756 Chassis (vertical slot)
- Connector Type: 20-pin removable terminal block (RTB)
- Certifications: UL, CSA, CE, KC, RCM, MARINE
- Isolation: 8 points per group
Typical Applications
- Discrete sensor input acquisition for manufacturing equipment
- Process status monitoring in bottling, packaging, and material handling systems
- Safety interlocks and emergency stop circuits
- Production line synchronization and control
- Building automation and HVAC system integration
- Machine tool feedback and tool changer indexing
Compatibility & Replacements
Compatible With
- ControlLogix 1756 chassis (1756-A4, 1756-A7, 1756-A10, 1756-A13)
- CompactLogix and related ControlLogix distributed I/O via EtherNet/IP
- Rockwell Automation Studio 5000 software
- ControlNet and EtherNet/IP networks
- Removable terminal blocks: 1756-TBNH, 1756-TBSH
Replaces / Drop-In Replacement For
- Previous generation 1756-IG16 (Series A)
- Verify exact series compatibility with your system integrator before ordering
Works With
- Rockwell Studio 5000 Logix Designer
- EtherNet/IPâ„¢ network protocol
- ControlNet® communication standard
- CompactLogix and ControlLogix controllers
