Overview
The Allen-Bradley 1746-IA16 is a 16-point AC input module designed for the SLC 500 family of programmable logic controllers. This module has sixteen (16) input channels with a voltage range of 85-132 Volts AC. This module occupies single slot of the SLC 500 chassis. The terminal block of this module is removable allowing replacement of the input module while eliminating the need to reconnect the input terminations. The 1746-IA16 is ideal for operators monitoring industrial AC signals from field devices including limit switches, push buttons, and interlock circuits.
Key Features
- Screw terminal connections, LED input status indicators, and backplane-powered operation (5 VDC at 0.085 A)
- Operates at 47–63 Hz with a voltage range of 85–132 VAC
- Removable terminal blocks for simplified wiring during installation and replacement
- Signal response time of 35 ms on-delay and 45 ms off-delay
- Operating range of 0–60 °C with certifications including GOST, KC, and Marine
- 16 inputs organized by common for efficient discrete device monitoring
Technical Specifications
- Module Type: Digital AC Input Module
- Input Channels: 16
- Operating Voltage: 85–132V AC
- Frequency Range: 47–63 Hz
- Signal Delay (On): 35 ms maximum
- Signal Delay (Off): 45 ms maximum
- Backplane Current: 85 milliamps at 5 Volts DC
- Terminals: Twenty (20) terminals with terminals 18 and 19 serving as internally connected commons
- Power Consumption: 0.27 watts per point with min to 0.425 Watts and a total of 4.8 Watts
- Dimensions: 5 x 2 x 6 inches (13 cm x 5 cm x 15 cm)
- Weight: 0.34 kg
- Operating Temperature: 0–60 °C
- Mount Style: Chassis-type
- Certifications: GOST, KC, and Marine
- Life Cycle Status: Discontinued November 24, 2022
Typical Applications
The 1746-IA16 is a general-purpose input application. It provides dependable channel-level status detection for industrial automation and safety-related applications, providing sixteen 100/120 VAC input channels for interfacing field devices with SLC processors in both standard and safety-related installations. Common field devices include limit switches, emergency stops, door interlocks, solenoid indicators, and proximity sensors operating at 100–120 VAC.
Compatibility & Replacements
Compatible With
- Allen-Bradley SLC 500 fixed I/O and modular chassis systems
- All SLC 500 processor models (1747-L5XX, 1747-L6XX, 1747-L7XX series)
- SLC 500 compact units with expansion I/O slots
- Industrial automation systems requiring 100–120 VAC discrete input monitoring
Replaces / Drop-In Replacement For
The 1746-IA16 is an original Allen-Bradley part number for SLC 500 systems. For 200/240VAC voltage operation, the counterpart part number is 1746-IM16. No direct drop-in replacement exists; however, for 200–240 VAC voltage category, use 1746-IM16 instead of 1746-IA16.
Works With
- SLC 500 programming software (RSLogix 500)
- Industrial automation platforms using discrete AC input monitoring
- EtherNet/IP networks via separate communication modules
- Discrete field device integration (limit switches, push buttons, interlock circuits)
