Description
The Allen-Bradley 1756-IF16 is a high-density analog input module part of the ControlLogix platform. It allows for the integration of up to 16 single-ended or 8 differential analog signals into the PLC system, supporting various voltage and current ranges for industrial sensing.
Product Parameters (Datasheet)
- Model Number: 1756-IF16
- Module Type: Analog Input (Non-Isolated)
- Number of Inputs: 16 Single-ended, 8 Differential, or 4 Differential (High-speed)
- Input Ranges: * Voltage: ±10V, 0-10V, 0-5V, 1-5V
- Current: 0-20mA, 4-20mA
- Resolution: 16-bit
- Backplane Current: 150mA @ 5.1VDC; 40mA @ 24VDC
- Power Dissipation: Typically 2.3 Watts
- Removable Terminal Block (RTB): 1756-TBNH or 1756-TBSH (Sold separately)
- Digital Filter: Programmable Notch Filter
Allen Bradley 1756-IF16
Allen Bradley 1756-IF16
Allen Bradley 1756-IF16
Country of Origin
This module is manufactured by Rockwell Automation in the United States, adhering to the highest global standards for programmable logic controller (PLC) hardware.
Application Fields
The 1756-IF16 is a versatile module used across diverse industrial sectors:
- Process Control: Monitoring temperature, pressure, and flow transmitters in chemical and oil plants.
- Water Management: Tracking tank levels and pump discharge pressures.
- Manufacturing: Integrating distance sensors and load cells for automated assembly lines.
- HVAC Systems: Measuring air quality and humidity levels in large-scale building automation.
Product Usage Instructions
- Chassis Installation: Align the module with the slots in the 1756 ControlLogix chassis. Press firmly until the top and bottom latches click, ensuring a solid backplane connection.
- Wiring the RTB: Connect your analog field devices to the Removable Terminal Block. Use shielded twisted-pair cables to minimize electromagnetic interference (EMI).
- Note: For current inputs (4-20mA), ensure the 249-ohm shunt resistors are correctly utilized or configured if the module revision requires them.
- Software Configuration: Open Studio 5000 Logix Designer. Add the 1756-IF16 to your I/O configuration.
- Scaling: Define the “Engineering Units” within the module properties. This converts the raw digital counts (0-32767) into meaningful values like PSI, °C, or Gallons/Minute.
- Calibration: Perform a periodic “On-Board Calibration” through the software to compensate for component aging and ensure long-term precision.
Product Technical Description
The 1756-IF16 utilizes a successive-approximation ADC (Analog-to-Digital Converter) to translate physical signals into 16-bit digital data. Technically, it is a non-isolated module, meaning all 16 channels share a common ground. While this allows for high density in a single slot, it requires careful wiring to avoid ground loops. The module features robust on-board diagnostics, including “Open Wire” detection for 4-20mA loops and “Out of Range” alarms to alert operators of sensor failures.
Q&A (Common Questions)
Q: What is the difference between the 1756-IF16 and the 1756-IF16H? A: The “H” version supports HART (Highway Addressable Remote Transducer) protocol, allowing the controller to read secondary diagnostic data from smart field instruments.
Q: Do I need a separate power supply for the loop? A: Yes, the 1756-IF16 does not provide loop power. You must provide a 24VDC external supply to power your 2-wire transmitters.
Q: Can I mix voltage and current inputs on the same module? A: Yes, each channel is individually configurable in the software, allowing you to have a mix of 0-10V and 4-20mA signals on the same card.
Q: What RTB should I use? A: The 1756-TBNH (NEMA screw) or 1756-TBSH (Spring clamp) are the standard choices. These must be purchased separately from the module.
Similar Model Recommendations
- Allen-Bradley 1756-IF8 (8-channel version)
- Allen-Bradley 1756-OF16 (Analog Output companion)
- Allen-Bradley 1756-IF16H (HART compatible version)
- Allen-Bradley 1756-IF6I (Isolated 6-channel variant)
- Allen-Bradley 1756-IF8I (Isolated 8-channel variant)
For more information on the Allen-Bradley 1756-IF16 and other ControlLogix solutions, please contact our automation specialists.
