Allen-Bradley 1746-IO12DC Combination DC Input/Output Module – SLC 500 Series
Imagine a production line grinding to a halt because a single I/O module fails to relay the discrete signals that coordinate conveyor timing, valve actuation, and sensor feedback. Without a reliable combination I/O module at the heart of the control rack, the entire automated sequence collapses — costing manufacturers thousands of dollars per hour in unplanned downtime. The Allen-Bradley 1746-IO12DC is the field-proven solution that keeps those critical signal pathways alive, delivering both input sensing and output control in a single compact SLC 500 rack slot.
Within the SLC 500 family — Rockwell Automation’s long-standing workhorse platform for small-to-mid-range discrete control — the 1746-IO12DC occupies a strategic position as a mixed-signal, DC-rated combination module. Its ability to consolidate input and output channels into one slot reduces rack space consumption and wiring complexity, making it a preferred choice for OEMs and system integrators worldwide who demand density without sacrificing signal integrity. The SLC 500 platform continues to operate in tens of thousands of installed industrial sites globally, and sourcing quality replacement modules like the 1746-IO12DC remains a mission-critical procurement task.
Technical Specifications
- Part Number: 1746-IO12DC
- Series: Allen-Bradley SLC 500
- Module Type: Combination DC Input/Output
- Signal Type: Discrete DC
- Total I/O Points: 12 (combined inputs and outputs)
- Compatible Rack: SLC 500 modular chassis (1746 series)
- Manufacturer: Rockwell Automation / Allen-Bradley
- Weight: Approx. 400 g
- Note: For complete electrical ratings, isolation specs, and wiring diagrams, refer to the official Rockwell Automation 1746-IO12DC Installation Instructions (Publication 1746-IN009).
Key Features & Benefits
- Dual-function design: Combines discrete DC inputs and outputs in a single module, reducing slot count and simplifying panel layout.
- DC signal compatibility: Optimized for 24 VDC field devices — sensors, proximity switches, solenoid valves, and pilot lights commonly found in modern industrial environments.
- Plug-and-play SLC 500 integration: Designed to seat directly into any 1746 modular chassis with no additional hardware adapters required.
- Compact footprint: Frees up rack slots for additional specialty modules, maximizing the utility of existing SLC 500 infrastructure.
- Proven field reliability: Part of the battle-tested SLC 500 ecosystem, with decades of deployment across global manufacturing facilities.
- Simplified wiring: Consolidated terminal block reduces field wiring runs and potential connection points, lowering installation time and fault risk.
Industry & Equipment Applications
- Automotive manufacturing: Body assembly lines, paint shop conveyors, and end-of-line test stations.
- Food & beverage processing: Filling machines, capping lines, and packaging conveyors requiring hygienic discrete control.
- Material handling: Sortation systems, palletizers, and automated storage and retrieval systems (AS/RS).
- Water & wastewater treatment: Pump control panels and valve sequencing in municipal and industrial water systems.
- Oil & gas: Wellhead control panels and pipeline monitoring stations with SLC 500-based legacy control systems.
- General discrete manufacturing: Any application requiring reliable DC signal I/O within an SLC 500 rack architecture.
System Integration & Compatible Parts
The 1746-IO12DC is designed to operate within the broader Allen-Bradley SLC 500 ecosystem. Compatible and commonly paired components include:
- SLC 500 Processors: 1747-L20, 1747-L30, 1747-L40, 1747-L511, 1747-L514, 1747-L524, 1747-L531, 1747-L532, 1747-L541, 1747-L542, 1747-L543, 1747-L551, 1747-L552, 1747-L553
- SLC 500 Chassis: 1746-A4, 1746-A7, 1746-A10, 1746-A13
- Power Supplies: 1746-P1, 1746-P2, 1746-P3, 1746-P4, 1746-P5, 1746-P6, 1746-P7
- Other 1746 I/O Modules: 1746-IB16, 1746-OB16, 1746-IA16, 1746-OA16, 1746-IM4, 1746-OW16
- Programming Software: RSLogix 500 / Studio 5000 Logix Designer (for SLC 500 legacy projects)
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1746-IO12DC module we supply undergoes a structured verification process before shipment:
- Visual inspection: Boards, connectors, and housing are examined for physical damage, corrosion, or counterfeit indicators.
- Label and firmware verification: Part number, revision level, and date codes are cross-referenced against Rockwell Automation documentation.
- Functional pre-check: Where applicable, modules are bench-tested for basic I/O response prior to packaging.
- Secure anti-static packaging: All modules are shipped in ESD-safe bags with protective foam inserts to prevent transit damage.
- Traceability documentation: Sourcing records are maintained to support your incoming inspection and audit requirements.
How to Order
- Submit an inquiry via our contact form or email support@konmask.com with your required quantity and delivery timeline.
- Our technical team will confirm availability, lead time, and provide a formal quotation within 1 business day.
- Upon PO receipt, we process and ship with full tracking information provided.
- For urgent requirements, please indicate “URGENT” in your subject line — we prioritize expedited sourcing for critical downtime situations.
Why Choose Konmask.com?
- Industrial automation specialists: We focus exclusively on PLC, DCS, and automation hardware — not a generalist distributor.
- Global sourcing network: Access to both new and refurbished stock across multiple trusted supply channels.
- B2B-first service model: Tailored for procurement teams, MRO buyers, and system integrators who need reliable partners, not just a storefront.
- Fast response SLA: Quotations within 24 hours; expedited options available for emergency plant shutdowns.
- Transparent quality documentation: We provide sourcing traceability and inspection records upon request.
Frequently Asked Questions
Q: Is the 1746-IO12DC still in production by Rockwell Automation?
A: The SLC 500 product line has been discontinued by Rockwell Automation. However, the 1746-IO12DC remains widely available through authorized distributors and reputable secondary market suppliers like Konmask.com. We maintain stock to support legacy system maintenance and plant expansions.
Q: What is the difference between the 1746-IO12DC and the 1746-IO12?
A: The “DC” suffix designates DC-rated I/O circuitry, optimized for 24 VDC field devices. The base 1746-IO12 may have different voltage ratings. Always verify the exact part number against your system’s field wiring voltage before ordering.
Q: Can I mix 1746-IO12DC modules with AC I/O modules in the same SLC 500 chassis?
A: Yes. The SLC 500 modular chassis supports mixing of different I/O module types in the same rack, provided each module’s field wiring is correctly isolated and the processor’s I/O configuration in RSLogix 500 matches the physical slot assignments.
Q: Do you provide a warranty on the 1746-IO12DC?
A: Yes. All modules supplied by Konmask.com carry a warranty against defects. Specific warranty terms are provided with each quotation. Please contact us for details.
Q: Can you source other SLC 500 modules I need alongside the 1746-IO12DC?
A: Absolutely. We specialize in complete SLC 500 system sourcing — processors, chassis, power supplies, and I/O modules. Send us your full BOM and we will provide a consolidated quotation.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1746-IO12DC Combination DC Input/Output Module”,
“description”: “The Allen-Bradley 1746-IO12DC is a combination DC input/output module for the SLC 500 series, providing 12 discrete DC I/O points in a single rack slot for industrial automation applications.”,
“sku”: “1746-IO12DC”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/allen-bradley-1746-io12dc-combination-io-module-slc500”,
“priceCurrency”: “HKD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
},
“category”: “PLC I/O Module”,
“url”: “https://konmask.com/products/allen-bradley-1746-io12dc-combination-io-module-slc500”
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “Is the 1746-IO12DC still in production by Rockwell Automation?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The SLC 500 product line has been discontinued by Rockwell Automation. However, the 1746-IO12DC remains widely available through authorized distributors and reputable secondary market suppliers like Konmask.com.”
}
},
{
“@type”: “Question”,
“name”: “What is the difference between the 1746-IO12DC and the 1746-IO12?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The DC suffix designates DC-rated I/O circuitry, optimized for 24 VDC field devices. Always verify the exact part number against your system field wiring voltage before ordering.”
}
},
{
“@type”: “Question”,
“name”: “Can I mix 1746-IO12DC modules with AC I/O modules in the same SLC 500 chassis?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. The SLC 500 modular chassis supports mixing of different I/O module types in the same rack, provided each module field wiring is correctly isolated and the processor I/O configuration in RSLogix 500 matches the physical slot assignments.”
}
},
{
“@type”: “Question”,
“name”: “Do you provide a warranty on the 1746-IO12DC?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. All modules supplied by Konmask.com carry a warranty against defects. Specific warranty terms are provided with each quotation.”
}
},
{
“@type”: “Question”,
“name”: “Can you source other SLC 500 modules alongside the 1746-IO12DC?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Absolutely. Konmask.com specializes in complete SLC 500 system sourcing including processors, chassis, power supplies, and I/O modules. Send your full BOM for a consolidated quotation.”
}
}
]
}
]
}
