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Allen-Bradley 1756-OB16I ControlLogix output module
1.General Description
The Allen-Bradley 1756-OB16I ControlLogix DC Digital Output Module is part of the Allen-Bradley 1756 ControlLogix series. It offers 16 individually isolated output channels, and you can configure each one for a safe state position.
This module works with 10–30 VDC. Perfect for machine control, PLC applications, and automation systems. It provides precise and reliable digital outputs.
The 1756-OB16I easily integrates into ControlLogix systems. Ideal for industrial uses that need strong isolation, reliable performance, and flexible setup.
2.Technical Specifications of Allen-Bradley 1756-OB16I
l Output Points: 16
l Output Type: Isolated DC digital output (sinking/sourcing)
l Operating Voltage Range: 10 to 30V DC
l Rated Voltage: 12/24V DC
l Current per Point (max): 2 A @ 30 °C (86 °F); 1 A @ 60 °C (140 °F) (linear derating)
l Current per Module (max): 8 A @ 30 °C; 4 A @ 60 °C
l Output Delay Time (OFF to ON): Maximum of 1 ms
l Output Delay Time (ON to OFF): Maximum of 2 ms
l Power Dissipation (Max): 3.6 Watts at 60 °C
l Thermal Dissipation: Optimized for high-efficiency heat management
l Isolation Voltage: 50 Volts continuous
l Backplane Current at 5 Volts: 350 mA
l Backplane Current at 24 Volts: 3 mA
l Dimensions (H × W × D): Approximately 300 × 150 × 40 mm (11.8 × 5.9 × 1.6 in.)
3. Detailed Features of allen bradley 1756 ob16i
A. Each of the 16 channels isolates. This prevents cross-talk and interference between the output points.
B. LED Status Indicators: Each channel features a dedicated LED indicator for real-time output monitoring and troubleshooting.
C. Configurable Safe State: You can set each output to a predefined safe state during system faults or power loss.
D. Robust Construction: Engineers designed the 1756-OB16I for demanding industrial environments, ensuring long-term reliability.
E. Flexible Mounting: Compatible with standard ControlLogix racks, the module allows easy installation and replacement.
F. Low Power & Thermal Dissipation: Engineered for efficient performance, minimizing excess heat generation.
4. Applications of allen bradley 1756-ob16i controllogix 16-point output module
The Allen-Bradley 1756-OB16I PLC output module is widely used across multiple automation and control fields:
A. Manufacturing Automation: Controls production line machinery and industrial actuators.
B. Process Control Systems: Used in food and beverage, pharmaceutical, and chemical industries for process automation.
C. Building Automation Systems: Manages HVAC, lighting, and building control systems.
D. Robotics and Motion Control: Delivers precise control signals to robotic arms, conveyors, and AGVs (automated guided vehicles).
5. Installation of 1756-ob16i plcs/machine control from allen bradley
l Preparation:
Ensure all power sources are turned off before installation.
Gather the necessary tools (screwdrivers, wiring materials).
l Mounting the Module:
Align the allen-bradley 1756-ob16i controllogix 16-point d/o module with the designated ControlLogix chassis slot.
Slide the module until it securely clicks into place.
l Wiring Connections:
Use a removable terminal block (RTB) for wiring output devices.
Follow the wiring diagram in the installation manual.
Verify all connections are secure and correctly labeled.
l Configuration:
Configure parameters using Rockwell Automation / RSLogix or Studio 5000 software tools.
Assign safe state positions and channel behavior as required.
l Testing and Power-Up:
Power on the system and confirm all LED indicators operate correctly.
Perform functional output tests before system commissioning.
6. Product Series & Related Models
The Allen-Bradley 1756-OB16I is part of the ControlLogix family. A DC Digital Output Module exists. People recognize this module for its modular design and high-performance I/O handling.
Related Part Numbers:
l Allen-Bradley 1756-OB32 – 32-point DC output module
l Allen-Bradley 1756-OH8I – 8-point high-speed isolated output module
l Allen-Bradley 1756-OA16I – 16-point AC output module
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