Overview
The Allen-Bradley 1756-OF8 is a professional-grade eight-point analog output module designed for ControlLogix chassis-based systems. It offers 8 voltage/current output points with high precision and versatility, enabling system integrators and controls engineers to configure analog outputs for voltage or current applications. It includes on-board data alarming, scaling to engineering units, and real-time channel sampling, making it suitable for process control, motion monitoring, and instrumentation applications.
Key Features
- Supports current (0–20mA) and voltage (-10V to +10V DC) outputs
- 15-bit (signed) resolution for precise analog representation
- Electronic module keying and user-defined mechanical RTB keying for flexible configuration
- 2 millisecond settling time and 0.05% calibration accuracy
- Over-voltage protection at 24 Volts DC and short-circuit protection limiting current to 21mA or less
- On-board data alarming and real-time channel sampling capabilities
Technical Specifications
- Analog Output Type: Voltage/Current, Single-Ended
- Output Points: 8 channels
- Output Voltage Range: -10 to +10 volts; Output Current Range: up to 20 milliamperes
- Signal Resolution: 15-bits across 21 mA and 15 bits across 10.4 Volts
- Current Requirements: 150 mA at 5.1V; 210 mA at 24V DC
- Power Consumption: 5.8 watts total from backplane
- Settling Time: 2 milliseconds; Calibration Accuracy: ±0.05%
- Operating Temperature: 0°C to 60°C
- Connector Type: 20-pin NEMA screw clamp terminal block
- Certifications: IEC, ATEX, CE, CSA, C-Tick, FM, KC, UL compliant
Typical Applications
- Process control systems requiring precise analog voltage or current output
- Motor speed and position feedback control loops
- Pressure and temperature transmitter signal conditioning
- Instrumentation and data acquisition systems in automated manufacturing
- HVAC and environmental control applications
- Batch process control with multiple analog output channels
Compatibility & Replacements
Compatible With
- ControlLogix chassis-based I/O systems
- Allen-Bradley CompactLogix and ControlLogix controllers
- Rockwell Automation Studio 5000 programming environment
- EtherNet/IP industrial networks
- Standard ControlLogix backplane mounting (20-pin slot configuration)
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering, particularly if replacing modules from different series or revisions.
Works With
- Rockwell Studio 5000 Logix Designer (RSLogix 5000)
- ControlLogix communication protocols and EtherNet/IP
- Removable terminal blocks: 1756-TBNH and 1756-TBSH
- Standard 20-position NEMA screw clamp and spring clamp terminal blocks
