1756-IB32 Allen-Bradley ControlLogix Digital DC Input Module

Description

1756-IB32 Allen-Bradley ControlLogix Digital DC Input Module

Product Dimensions：

Product Description

The Allen-Bradley 1756-IB32 is a 32-point, 12/24V DC digital input module for the ControlLogix programmable automation controller (PAC) platform. This module serves as a critical interface, allowing your ControlLogix system to receive discrete (on/off) signals from a wide array of industrial field devices. Think of it as the eyes of your controller, monitoring the status of 32 individual devices such as pushbuttons, limit switches, and proximity sensors. Its design supports both sink (NPN) and source (PNP) wiring configurations, offering exceptional versatility for various industrial applications.

Product Parameters

• Catalog Number: 1756-IB32
• Series: ControlLogix Digital DC Input Module
• Input Type: Digital (Discrete)
• Number of Inputs: 32 points
• Voltage Category: 12/24V DC
• Input Wiring Type: Sink/Source (can be auto-sensing or configurable depending on the module’s revision)
• Operating Voltage Range: 10V DC to 31.2V DC (confirm specific range with the official datasheet)
• Current per Input: Typically 8 mA @ 24V DC (ON state current)
• Backplane Current:
  • @ 5.1V DC: ~200 mA
  • @ 24V DC: ~2 mA
• Module Location: Installs into any I/O slot in a ControlLogix chassis
• Isolation: 250V (continuous) reinforced insulation between input points and the backplane, and between individual input points.
• Required Terminal Block: This module requires a separate Removable Terminal Block (RTB), such as the 1756-TBNH or 1756-TBSH, for field wiring. (RTB is sold separately.)
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Indicators: Individual LED indicators for each of the 32 input points, showing ON/OFF status.
• Response Time: Fast input response, generally between 0.5 ms and 8 ms (may be configurable).

Product Advantages

• High Density I/O: With 32 input points, it offers a high concentration of I/O in a single module, saving valuable chassis space and simplifying your system architecture.
• Flexible Wiring: Its ability to handle both sink (NPN) and source (PNP) input devices makes it compatible with a vast array of industrial sensors and switches you might encounter.
• Robust & Reliable: Engineered for demanding industrial environments, ensuring consistent performance and a long operational lifespan.
• Seamless Integration: Designed to integrate flawlessly into the Rockwell Automation ControlLogix platform, simplifying programming, configuration, and diagnostics via Studio 5000 Logix Designer.
• Easy Diagnostics: On-board diagnostics coupled with individual input status LEDs allow for quick troubleshooting, minimizing downtime.
• Hot Swappable: You can insert or remove the module while the ControlLogix chassis is powered, enabling faster maintenance and reducing system disruption.
• Electrical Isolation: Provides critical electrical isolation between your field devices and the controller’s backplane, protecting the control system from electrical noise and potential surges.

Precautions

• RTB is Essential: Remember, the 1756-IB32 does not include the terminal block. You must purchase a compatible Removable Terminal Block (RTB) separately (e.g., 1756-TBNH or 1756-TBSH) for field device wiring.
• Proper Wiring: Always adhere to industrial wiring best practices. Use the correct wire gauge and ensure all connections are secure to prevent intermittent signals or electrical issues.
• Input Voltage Compliance: Ensure that all connected field devices operate strictly within the module’s 12/24V DC input voltage range. Exceeding this range can severely damage the module.
• Sink/Source Matching: Verify the wiring type (sink or source) of your field devices and ensure it aligns correctly with the module’s configuration or wiring scheme.
• Environmental Protection: Install the module within an appropriate enclosure that shields it from excessive dust, moisture, and extreme temperatures to ensure optimal performance and longevity.
• ESD Awareness: This module contains sensitive electronic components. Always follow Electrostatic Discharge (ESD) precautions when handling it to prevent damage.

Product Applications

The Allen-Bradley 1756-IB32 is a workhorse in industrial automation, used in a wide range of applications where discrete DC input signals need to be integrated into a ControlLogix system. Common applications include:

• Discrete Manufacturing: Monitoring the status of various components like limit switches on conveyor belts, proximity sensors for part detection, operator pushbuttons, and other on/off signals in assembly lines.
• Process Control: Receiving input signals from level switches, pressure switches, flow switches, and valve position sensors in industries such as chemical processing, oil and gas, and water treatment.
• Material Handling: Tracking product presence, position, and activating safety interlocks on automated guided vehicles (AGVs), sortation systems, and robotic cells.
• Packaging Machinery: Monitoring sensors for product presence, carton integrity, and essential machine safety interlocks.
• Building Automation: Integrating various alarm points, door contacts, and environmental sensors into building management and control systems.
• General Machine Control: Providing input for the overall control logic of diverse industrial machinery.

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