Overview
The Allen-Bradley 1746-OA16 is a 16-point digital AC output module engineered for the SLC 500 series of programmable logic controllers. This module is an SLC 500 I/O module, specifically an AC output module with 16 output channels. It features a total of 16 outputs that enable effective control of connected devices, making it essential for controlling motors, solenoids, heating elements, and other AC loads in industrial automation environments.
Key Features
- Output channels rated at 120/240 Volts AC
- Digital AC output module with voltage range of 85 to 265 Volts AC and 370 milliamps backplane current, suitable for general purpose applications
- Rated continuous current per output point of 0.5 Amps at 30°C and 0.25 Amps at 60°C; maximum continuous current per output point is 8.0 Amps at 30°C and 4.0 Amps at 60°C
- Handles up to 10 Amps of surge current per output for a brief duration of 25 milliseconds
- Signal delay with maximum resistive load is 1 millisecond for the on-state and 11 milliseconds for the off-state
- LED status indicator and rack-mount design with screw clamp terminals
Technical Specifications
The 1746-OA16 meets industrial-grade reliability requirements with comprehensive electrical and mechanical specifications:
- Operating voltage range: 85 to 265 Volts AC at 47 to 63 Hertz
- Minimum load current: 10 mA to activate the outputs
- Maximum off-state leakage current: 2 milliamps
- Rated on-state maximum voltage drop: 1.5 Volts at 0.50 Amps
- Operating temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
- Weight: 0.65 lbs
- Frequency: 47–63 Hz
Typical Applications
SLC 500 programmable controllers provide excellent value for material handling, HVAC control, high speed assembly operations, small process control, simple motion control, and SCADA applications. The 1746-OA16 output module is commonly deployed for:
- Controlling 120/240V AC motors and solenoid valves
- Industrial heating and lighting control systems
- Manufacturing line automation and sequencing
- HVAC and facility management systems
- Equipment protection and load shedding circuits
Compatibility & Replacements
Compatible With
- SLC 500 compact and modular processor chassis (1747-L511, 1747-L514, 1747-L524, 1747-L541, 1747-L553, 1747-L555)
- SLC 500 I/O chassis and backplanes
- Allen-Bradley programming software (RSLogix 500, Studio 5000 Logix Emulate)
- Ethernet and serial communication networks supported by SLC 500 modules
- General-purpose 120/240V AC industrial loads
Replaces / Drop-In Replacement For
Variant revisions include 1746-OA16E, 1746-OA16D, 1746OA16A, 1746OA16B, and 1746OA16F, which are directly interchangeable with the base 1746-OA16 module. Note that Bulletin 1746 I/O modules are discontinued and no longer available for sale, making surplus and refurbished units the primary source for system repairs and expansions.
Works With
- RSLogix 500 development and monitoring software
- SLC 500 modular and compact processor architectures
- Standard 120/240V AC power distribution systems (single-phase or three-phase)
- Industrial I/O wiring and terminal blocks compatible with screw clamp connections
- Distributed I/O racks and centralized SLC 500 control systems
