Allen-Bradley 1746-OAP12 High Current AC Output Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1746-OAP12 is a high-current 120/240V AC output module designed for the SLC 500 programmable controller platform. It provides 12 isolated output points capable of switching AC loads at high current ratings, making it a workhorse in demanding industrial control applications where reliable AC switching is critical.
Selection Background
Buyers searching for a 1746-OAP12 replacement or equivalent module are typically facing one of three scenarios: the original module has failed and needs an immediate substitute, the module is discontinued or on long lead time, or a system redesign requires a functionally equivalent alternative from a different vendor. Understanding which scenario applies to you is the first step in making the right selection. This guide covers direct drop-in replacements, functional equivalents, and cross-brand alternatives so you can make a confident, informed decision — and Konmask is here to help at every step.
Technical Specifications
| Part Number | 1746-OAP12 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Module Type | AC Discrete Output |
| Number of Outputs | 12 Points ⚑ (key for replacement matching) |
| Output Voltage Range | 120/240V AC ⚑ (must match in any equivalent) |
| Output Current per Point | 2A (high current) ⚑ (critical for load compatibility) |
| Maximum Load Current | 8A per common |
| Output Type | Triac (solid-state) |
| Isolation | Optically isolated, group isolated commons |
| Backplane Current (5V) | 185 mA |
| Backplane Current (24V) | 0 mA |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C |
| Certifications | UL, CSA, CE |
| Form Factor | SLC 500 single-slot I/O module |
| Weight | ~400g |
⚑ Parameters marked are the most critical when evaluating any replacement or equivalent module.
Compatible Replacement & Equivalent Models
1. Direct Drop-in Replacements (Same Form, Fit & Function)
These modules can replace the 1746-OAP12 without any wiring, configuration, or software changes:
- 1746-OAP12 (New / Surplus / Refurbished) — Identical part; verify firmware revision compatibility with your SLC 5/xx processor if using a refurbished unit.
- 1746-OAP12D — Diagnostic version with added fault detection; fully backward compatible as a drop-in upgrade. Note: Requires RSLogix 500 v8.0+ to utilize diagnostic features.
2. Functional Equivalents (Same Platform, Different Spec)
These SLC 500 output modules share the same backplane interface but differ in output count or current rating — confirm your wiring and load requirements before substituting:
- 1746-OA16 — 16-point 120/240V AC output, 1A per point. Suitable if your application uses fewer than 2A per channel and you can remap I/O addresses.
- 1746-OA8 — 8-point 120/240V AC output, 2A per point. Use when only 8 outputs are needed; requires I/O address remapping.
- 1746-OAP12 (Series B) — Minor hardware revision; functionally equivalent in most applications. Confirm with Rockwell compatibility matrix for your processor series.
3. Cross-Brand Alternatives (Third-Party Equivalents)
These modules offer equivalent AC output functionality on compatible or alternative platforms. A PLC platform migration or adapter may be required:
- Siemens 6ES7 322-1BL00-0AA0 — 16-point 120/230V AC digital output for S7-300; functional substitute in cross-brand redesigns. Requires platform migration.
- Mitsubishi QY10 — 16-point 100-240V AC transistor output for Q-series; suitable for system redesign projects.
- Schneider Electric 140DAO84010 — Modicon Quantum 8-point 120V AC output; cross-brand alternative for large-scale migrations.
⚠ Cross-brand alternatives require full system re-engineering. Contact Konmask for migration support.
Why Choose the Original 1746-OAP12
- Precision & Reliability: Factory-calibrated triac outputs with guaranteed switching accuracy — no field tuning required.
- OEM Certification: UL, CSA, and CE certified; meets IEC 61131-2 standards for industrial control equipment.
- Seamless SLC 500 Compatibility: Plug-and-play with all SLC 5/01, 5/02, 5/03, 5/04, and 5/05 processors — zero configuration overhead.
- Rockwell Ecosystem Support: Full integration with RSLogix 500, FactoryTalk Diagnostics, and Rockwell’s global technical support network.
- Warranty & Traceability: Genuine modules sourced through authorized channels include full manufacturer warranty and lot traceability documentation.
- Long-Term Availability: Konmask maintains stock of both new and certified surplus units to support legacy SLC 500 systems still in active production.
Typical Applications
- Automotive Manufacturing: Controlling AC solenoid valves and motor starters on assembly line conveyors.
- Food & Beverage Processing: Switching AC heating elements and agitator motors in mixing and pasteurization equipment.
- Water & Wastewater Treatment: Operating AC pump motors and valve actuators in filtration and dosing systems.
- HVAC & Building Automation: Controlling AC fan motors, damper actuators, and chiller contactors in commercial HVAC systems.
- Packaging Machinery: Driving AC sealing bars, conveyor drives, and labeling actuators in high-speed packaging lines.
- Oil & Gas: Switching AC-powered safety valves and pump controls in upstream and midstream process skids.
System Compatibility
The 1746-OAP12 is compatible with the following SLC 500 system components:
- 1746-A4 / A7 / A10 / A13 — SLC 500 modular chassis (4, 7, 10, 13 slots)
- 1747-L511 / L514 / L524 / L531 / L532 / L541 / L542 / L543 / L551 / L552 / L553 — SLC 5/01 through 5/05 processors
- 1746-P1 / P2 / P3 / P4 — SLC 500 power supply modules
- 1746-BAS / BAS-T — BASIC module for co-processor applications
- 1747-SDN — DeviceNet scanner for networked I/O configurations
- 1747-SCNR — Remote I/O scanner for distributed rack configurations
Selection Guide
Answer these three questions to confirm the 1746-OAP12 — or its equivalent — is the right choice for your application:
- Does your system run on the SLC 500 platform? If yes, the 1746-OAP12 or its direct SLC 500 equivalents (OA16, OA8) are your best path. If no, a cross-brand alternative or platform migration may be needed — contact Konmask for a compatibility assessment.
- Do any of your output channels require more than 1A switching current? If yes, the 1746-OAP12’s 2A-per-point rating is essential. The 1746-OA16 (1A/point) would not be a safe substitute for high-current loads.
- Is your load voltage 120V AC, 240V AC, or dual-voltage? The 1746-OAP12 supports both 120V and 240V AC — confirm your field wiring voltage before selecting any equivalent module.
Not sure? Contact Konmask at support@konmask.com — our engineers will review your system configuration and recommend the correct module or equivalent within 24 hours.
Quality Assurance & Sourcing
Konmask sources the 1746-OAP12 through verified channels including authorized distributors, OEM surplus, and certified refurbishers. Every unit undergoes a 4-step inspection process before shipment:
- Visual Inspection: Check for physical damage, corrosion, counterfeit indicators, and label authenticity.
- Functional Test: All 12 output points tested under load conditions at both 120V and 240V AC.
- Firmware Verification: Series and revision confirmed against Rockwell’s published compatibility matrix.
- Documentation Review: Lot traceability, test reports, and certificate of conformance prepared for each unit.
Available documentation upon request: Certificate of Conformance, Test Report, Material Safety Data Sheet (MSDS), Country of Origin Declaration.
How to Order
- Submit Your Inquiry: Email support@konmask.com with your part number (1746-OAP12), required quantity, and any specific revision or certification requirements.
- Receive Quote & Availability: Konmask will confirm stock availability, lead time, and pricing within 24 hours.
- Confirm & Ship: Approve the quote, complete payment, and your order ships with full documentation and tracking.
📞 +0086 19859288691 | ✉ support@konmask.com
Replacement & Compatibility FAQ
Q: What is the best direct replacement for the Allen-Bradley 1746-OAP12?
A: The best direct replacement is another 1746-OAP12 (new, surplus, or refurbished). The 1746-OAP12D is a drop-in upgrade equivalent that adds diagnostic capability. Both are plug-and-play substitutes with no wiring or software changes required.
Q: Is the 1746-OA16 compatible with and equivalent to the 1746-OAP12?
A: The 1746-OA16 is a functional equivalent on the same SLC 500 platform but is not a direct substitute — it has 16 output points (vs. 12) and a lower current rating of 1A per point (vs. 2A). It is compatible as a replacement only if your loads do not exceed 1A per channel and you remap I/O addresses in RSLogix 500.
Q: Can a Siemens or Mitsubishi module substitute for the 1746-OAP12 in an existing SLC 500 system?
A: Cross-brand modules are not plug-and-play substitutes for the 1746-OAP12 in an existing SLC 500 rack — they require a full platform migration. However, they are valid equivalent alternatives in system redesign or new build projects. Contact Konmask for cross-brand migration guidance and compatible replacement recommendations.
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