Overview
The Allen-Bradley 1746-OA16 is a discrete AC output module part of the SLC 500 I/O series. This 16-point output module provides general-purpose 120/240V AC control outputs and operates across a wide input voltage range of 85–265V AC at 47–63 Hz, making it suitable for diverse industrial environments. The module features 16 AC output channels in two groups of eight outputs each, with removable terminal blocks for simplified field installation and maintenance.
Key Features
- 16 discrete AC output channels configured as two commons with 8 outputs per group
- TRIAC outputs that turn ON at any point on the AC line and turn OFF on the zero cross
- Filter circuitry and optical coupling for signal noise reduction
- Removable terminal blocks eliminate the need to disconnect wires when replacing modules
- LED indicators show output status values for easy troubleshooting
- Compatible with all SLC 500 fixed and modular processors via standard backplane connection
Technical Specifications
| Output Points | 16 (two groups of 8) |
| Voltage Category | 120/240V AC nominal |
| Operating Voltage Range | 85–265V AC |
| Frequency | 47–63 Hz |
| Backplane Current (at 5V DC) | 370 mA |
| Minimum Load Current | 10 mA per point |
| Continuous Current per Point (30°C) | 0.5 A |
| Continuous Current per Point (60°C) | 0.25 A |
| Maximum Continuous Current per Module (30°C) | 8.0 A |
| Maximum Continuous Current per Module (60°C) | 4.0 A |
| ON Signal Delay | 1 ms (max) |
| OFF Signal Delay | 11 ms (max) |
| OFF-State Leakage Current | 2 mA (max) |
| Operating Temperature | 0–60°C (32–140°F) |
| Module Weight | 0.60 lbs |
| Terminal Style | Screw clamp terminals (removable) |
| Output Type | TRIAC |
| Series | SLC 500 / Bulletin 1746 |
Typical Applications
- Material handling equipment control and sequencing
- HVAC system activation and management
- Small-to-medium process control and discrete automation
- High-speed assembly line output switching
- Factory automation and machine tool control
- General-purpose industrial relay replacement using solid-state outputs
Compatibility & Replacements
Compatible With
- SLC 500 Programmable Logic Controllers (PLC) processors, CompactLogix, and ControlLogix systems
- Local and remote I/O configuration in SLC 500 chassis
- SLC 500 Ladder Logic programming via RS-Logix or Studio 5000
- Standard Allen-Bradley 1746 I/O backplane connections
- 1746 I/O module-ready cables with pre-wired RTB connectors and #18 AWG conductors
Replaces / Drop-In Replacement For
- 1746-OA16 Series A, B, C, D, E, F variants
- Legacy discrete relay outputs in existing SLC 500 cabinets
- Verify compatibility with your system integrator before ordering.
Works With
- RS-Logix 500 / Studio 5000 ladder logic programming
- SLC 500 discrete output image tables and bit-level control
- Standard industrial AC loads: motors, contactors, solenoids, indicator lights
- Surge suppression modules (1746-F9 fuse, Harris MOV V220MA2A recommended for inductive loads)
