Overview
The Allen-Bradley 1791-16B0 is a dedicated 16-point input module engineered for CompactBlock distributed I/O architectures. This block I/O module provides flexible discrete input functionality within the proven 1791 Series family, designed for integration into PLC systems requiring modular, scalable input capacity.
Key Features
- 16-point digital input capacity organized into two groups of 8 channels
- Input voltage range: 10 to 30 V DC
- Low power dissipation: 11.1 watts (38 BTU/hr thermal output)
- On-state current: 2.5 mA to 11 mA
- Input impedance: 3.4 kΩ for stable signal acquisition
- Compact footprint suitable for space-constrained control enclosures
Technical Specifications
- Input Voltage Range: 10–30 V DC
- Number of Inputs: 16 channels (two groups of 8)
- On-State Current: 2.5–11 mA
- Off-State Voltage (max): 5 V DC
- Input Impedance: 3.4 kΩ
- Power Dissipation: 11.1 watts
- Thermal Dissipation: 38 BTU/hr
- Weight: 0.99 lbs (0.45 kg)
- Series: 1791 Block I/O, Series B
- Discontinued: June 30, 2015 (legacy surplus availability)
Typical Applications
The 1791-16B0 is commonly deployed in:
- Machine control and motion systems requiring distributed digital sensing
- Conveyor and material handling automation with discrete input monitoring
- Industrial equipment limit switches, proximity sensors, and alarm inputs
- PLC remote I/O racks and cabinet consolidation projects
- Process control systems with 24 VDC sensor integration
Compatibility & Replacements
Compatible With
- CompactLogix and PLC systems with 1791 Block I/O architecture
- Distributed I/O racks and modular automation frames
- 24 VDC discrete sensor networks and hardwired control signals
- Studio 5000 and legacy RSLogix programming environments
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 1791-16B0 is part of the legacy 1791 Series product line; current CompactBlock input modules may differ. Alternative models include the 1791-16BC (combination module) and 1791R-16B0 (CompactBlock variant).
Works With
- Studio 5000 Logix Designer and RSLogix environments
- CompactBlock distributed I/O protocol
- DeviceNet and legacy discrete control systems
- Standard 24 VDC industrial sensor and PLC configurations
