1756-IA16 | Allen-Bradley ControlLogix AC Input Module Supplier
Introduction:
The 1756-IA16 from Allen-Bradley is a 16-point digital AC input module for ControlLogix systems, offering reliable 120VAC signal detection.
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Introduction to the 1756-IA16
When your automation system needs to reliably detect 120VAC discrete signals, the 1756-IA16 from Allen-Bradley delivers. This digital AC input module is part of the ControlLogix series and provides sixteen input points. It operates at a nominal input voltage of 120VAC with a range of 74 to 132VAC. Engineers choose this module for its robust design and seamless integration into ControlLogix chassis.
Key Features & Technical Specs
- The 1756-IA16 features sixteen discrete input channels grouped into two groups of eight.
- It accepts an operating voltage range of 74 to 132 Volts AC at 47 to 63 Hz.
- Minimum ON-state current is 5 mA at 79V AC, while maximum ON-state current is 13 mA at 132V AC.
- Cyclic update time ranges from 200 µs to 750 ms.
- Signal delay for ON transition includes a hardware delay of 8 ms max plus user-selectable filter time of 9 ms or 18 ms.
- Signal delay for OFF transition includes a hardware delay of 10 ms max plus filter time of 1 ms or 2 ms.
- Backplane current draw is 100 mA at 5.1VDC and 2 mA at 24VDC, with total backplane power of 0.58 W.
- Compatible removable terminal blocks include 1756-TBNH and 1756-TBSH.
A distinctive spec is the programmable input delay time of 9 or 18 milliseconds for ON transitions. This allows users to tailor the module to filter out electrical noise in harsh industrial environments, reducing false triggers.
Applications & Use Cases
In manufacturing plants, the 1756-IA16 monitors limit switches, pushbuttons, and proximity sensors. Its 74-132VAC range makes it ideal for legacy 120VAC control circuits. For example, in a conveyor system, it reliably reads start/stop commands from operator stations. Additionally, its two input groups simplify wiring for zone-based monitoring in packaging lines.
Installation & Setup
Mount the 1756-IA16 into any ControlLogix chassis slot. Use the 1756-TBNH or 1756-TBSH removable terminal block for field wiring. Ensure input signals are within 74-132VAC and frequency of 47-63 Hz. Configure filter times via the ControlLogix programming software to match your noise environment. No special tools are required beyond standard screwdrivers for terminal connections.
Maintenance & Reliability
Regularly inspect the terminal block connections for tightness and signs of corrosion. The module's LED indicators per channel simplify troubleshooting. For long-term reliability, keep the chassis environment within specified temperature limits (refer to official documentation). Periodic cleaning of the chassis air filters helps maintain proper cooling.
Compatibility & Integration
The 1756-IA16 integrates with any ControlLogix chassis and works with the full ControlLogix family of controllers. It communicates via the backplane, so no additional network configuration is needed. This module is compatible with 1756-TBNH and 1756-TBSH terminal blocks for field wiring.
Comparison with Similar Modules
Compared to the 1756-IA32 (32-point AC input module), the 1756-IA16 offers half the channels but shares the same voltage range and filter options. For applications requiring fewer inputs, the 1756-IA16 reduces wiring complexity and backplane current draw. The 1756-IA16 draws 100 mA at 5.1VDC versus the 1756-IA32's higher draw, making it suitable for power-sensitive chassis.
FAQ about 1756-IA16
Q: What is the input voltage range of the 1756-IA16?
A: The input voltage range is 74 to 132 Volts AC at 47 to 63 Hz.
Q: How many input channels does the 1756-IA16 have?
A: It has sixteen input channels, grouped into two groups of eight.
Q: What terminal blocks are compatible with the 1756-IA16?
A: Compatible terminal blocks are the 1756-TBNH and 1756-TBSH.
Q: Can the input filter time be adjusted on the 1756-IA16?
A: Yes, the filter time for ON transition is user-selectable at 9 or 18 ms, and for OFF transition at 1 or 2 ms.
Q: What is the backplane current draw of the 1756-IA16 at 5.1VDC?
A: The backplane current draw is 100 mA at 5.1VDC.
Q: Is the 1756-IA16 compatible with ControlLogix controllers?
A: Yes, it is designed for use with any ControlLogix chassis and controller.
Product Support & Availability
The 1756-IA16 is in stock and ready to ship from PetroPartsOnline. As a trusted supplier of industrial automation parts, PetroPartsOnline offers fast delivery and expert support. Contact our team for pricing and availability.