Product Introduction
The Allen-Bradley 1746-IA16 is a Digital AC Input Module from the SLC 500 series, designed to deliver reliable signal acquisition for programmable logic controller (PLC) systems. With sixteen input channels accepting 85–132 Volts AC, this module serves as a critical interface between field devices and the controller. Its single-slot occupancy in the SLC 500 chassis ensures space efficiency, while the removable terminal block simplifies wiring and replacement. Built for demanding industrial environments, the 1746-IA16 provides cost-effective uptime by minimizing unnecessary maintenance and reducing downtime—a core advantage for operations seeking long-term return on investment.
Industry Applications
In manufacturing, the Allen-Bradley 1746-IA16 excels at converting AC signals from limit switches, push buttons, and proximity sensors into logic-level inputs. For example, in a packaging line, it reliably reads 120VAC signals from photoelectric sensors, enabling precise product counting and sorting. In material handling, the module monitors conveyor belt status via AC-powered switches, directly supporting throughput goals. The 16-channel density allows one module to cover multiple input points, reducing per-point costs and simplifying panel layout—key factors in the total cost of ownership.
Compatibility & Integration
Engineered exclusively for the Allen-Bradley SLC 500 family, the 1746-IA16 integrates seamlessly with both fixed and modular controller configurations. It can be installed in local or expansion racks, using standard I/O connections (1746-HT or 1746-HCA). This broad compatibility means upgrading or replacing an existing SLC 500 input module is straightforward, with no additional adapters required. For systems operating at 200/240VAC, the companion model 1746-0IM16 offers an alternative, ensuring the right fit for any voltage range within the platform.
Installation & Setup Guidance
Mount the Allen-Bradley 1746-IA16 into any available slot in an SLC 500 chassis—no tools needed beyond a screwdriver for the removable terminal block. Wire AC input devices to terminals 0–15, with commons on terminals 18 and 19. Ensure the supply voltage stays within 85–132VAC at 47–63 Hz. For fixed controllers, observe chassis power limitations; in modular setups, confirm backplane current draw (85 mA at 5VDC) does not exceed the power supply rating. The module’s LED indicators simplify verification: each lit channel confirms a valid AC signal, reducing startup time.
Selection Guide & Purchasing Advice
Before ordering the 1746-IA16, verify your system’s voltage category—this module is designed for 100–120VAC nominal. If your application uses 200–240VAC, choose the 1746-0IM16 instead. No internal protection circuitry exists; therefore, all input devices must be compatible with the module’s inrush current profile (max 500 µs at 0.8 mA). For bulk pricing or support, UBEST Automation (ubest101.myshopify.com) stocks genuine Allen-Bradley modules with fast shipping. Always confirm slot availability and backplane current before installation to avoid system overload.