Allen-Bradley 1746-OB16 16-Point DC Output Module – SLC 500 Series
Imagine a bottling line mid-shift: solenoid valves fail to actuate, conveyor drives stop responding, and indicator lamps go dark — all because a single output module has failed. In modern discrete manufacturing, every output point is a command link between the controller and the physical world. Without a reliable DC output module like the 1746-OB16, the entire control loop collapses, halting production and triggering costly unplanned downtime. The Allen-Bradley 1746-OB16 is not a commodity component — it is the last mile of control authority in your SLC 500 system.
Within the SLC 500 I/O family, the 1746-OB16 occupies a critical mid-density position: 16 sourcing DC output points in a single-slot module, balancing channel count, current capacity, and slot economy for panel builders and system integrators worldwide. Since Rockwell Automation introduced the SLC 500 platform, it has become one of the most widely deployed small-to-mid-range PLC architectures globally, and the 1746-OB16 remains a cornerstone output module for both new installations and legacy system maintenance across North America, Europe, and Asia-Pacific.
Technical Specifications
- Part Number: 1746-OB16
- Series: Allen-Bradley SLC 500
- Output Type: DC Sourcing (PNP)
- Number of Output Points: 16
- Output Voltage Range: 10–50V DC
- Output Current: 0.5A per point
- Module Current Draw (Backplane): 185mA @ 5V DC
- Isolation: Optical isolation between field side and backplane
- Indicators: Per-point LED output status
- Backplane Compatibility: SLC 500 fixed and modular chassis (1746 series)
- Weight: Approx. 140 g
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5–95% non-condensing
- Certifications: UL, CSA, CE (refer to Rockwell publication 1746-TD004)
Key Features & Benefits
- High-density sourcing outputs — 16 PNP points per slot reduce chassis slot consumption and wiring complexity compared to lower-density alternatives.
- Wide voltage range (10–50V DC) — compatible with 12V and 24V DC field devices without module substitution, simplifying multi-voltage panel designs.
- Per-point LED diagnostics — instant visual confirmation of output state accelerates fault isolation during commissioning and maintenance.
- Optical isolation — protects the SLC 500 backplane from field-side transients, extending system MTBF in electrically noisy environments.
- Drop-in SLC 500 compatibility — slots directly into any 1746 modular chassis; no firmware changes or special configuration required.
- Proven field reliability — the SLC 500 platform has accumulated decades of runtime in harsh industrial environments, and the 1746-OB16 is one of its most battle-tested output modules.
Industry & Equipment Applications
- Food & Beverage: Solenoid valve control on filling, capping, and labeling lines
- Automotive Manufacturing: Actuator and relay control on assembly and welding fixtures
- Material Handling: Conveyor drive enable signals, diverter gate control
- Water & Wastewater Treatment: Pump start/stop commands, valve actuation
- Packaging Machinery: Servo drive enable, reject gate, and indicator lamp control
- HVAC & Building Automation: Fan and damper actuator control in legacy BAS panels
- Oil & Gas: Field device control in SLC 500-based wellhead and pipeline SCADA panels
System Integration & Compatible Parts
The 1746-OB16 integrates seamlessly within the SLC 500 ecosystem. Common companion components include:
- Processors: 1747-L20, 1747-L30, 1747-L40, 1747-L541, 1747-L551
- Chassis: 1746-A4, 1746-A7, 1746-A10, 1746-A13
- Power Supplies: 1746-P1, 1746-P2, 1746-P4
- Input Modules (complementary): 1746-IB16, 1746-IB32, 1746-IA16
- Communication Modules: 1747-SDN (DeviceNet), 1747-KE (DH-485), 1747-AENTR (EtherNet/IP)
- Programming Software: RSLogix 500 / Studio 5000 Logix Designer (legacy mode)
Our Quality Assurance Process
At Konmask.com, every 1746-OB16 unit passes through a structured verification process before shipment:
- Visual Inspection: Connector pins, PCB, housing, and label integrity checked against OEM reference standards.
- Functional Verification: Where test fixtures are available, output switching and backplane communication are validated.
- Authenticity Screening: Units are cross-referenced against known OEM markings, date codes, and serial number formats to screen for non-genuine parts.
- Packaging: Anti-static packaging with desiccant; double-boxed for international freight.
- Documentation: Certificate of conformance and inspection report available on request.
How to Order
Konmask.com operates as an inquiry-driven B2B supplier. To request a quote for the 1746-OB16:
- Submit an RFQ via the Contact / Inquiry form on this page.
- Email: support@konmask.com
- WhatsApp / Phone: +0086 19859288691
Please include your required quantity, delivery timeline, and destination country. We respond to all inquiries within 1 business day. Volume pricing and blanket order arrangements are available for qualified buyers.
Why Choose Konmask.com?
- Specialist Focus: We source exclusively in industrial automation components — PLC, DCS, drives, and motion control. No generalist catalog dilution.
- Global Sourcing Network: Access to surplus, refurbished, and new-surplus stock from verified industrial distributors and OEM channels worldwide.
- B2B-First Service: Dedicated account support for MRO buyers, system integrators, and OEM procurement teams.
- Transparent Documentation: Full traceability documentation available; we do not ship parts without provenance records.
- Fast Quotation: Most RFQs receive a firm quote within 24 hours, with expedited options for urgent plant-down situations.
Frequently Asked Questions
Q: Is the 1746-OB16 still in production by Rockwell Automation?
A: The SLC 500 platform has been in a mature/end-of-life phase. Rockwell Automation has announced migration paths to the CompactLogix (1769) platform. However, 1746-OB16 modules remain widely available as new-surplus and refurbished stock, and Konmask.com maintains sourcing channels for ongoing MRO supply.
Q: What is the difference between 1746-OB16 and 1746-OB32?
A: The 1746-OB32 provides 32 sourcing DC output points in a single slot versus 16 points on the OB16. The OB16 is preferred when lower channel density is sufficient, as it typically offers a lower per-unit cost and is more readily available in the secondary market.
Q: Can the 1746-OB16 drive inductive loads such as solenoids and relay coils?
A: Yes. The module is rated for inductive DC loads. Rockwell Automation recommends installing suppression diodes across inductive loads to protect output transistors and extend module service life.
Q: What programming software is required to configure the 1746-OB16?
A: The 1746-OB16 is configured within RSLogix 500 (legacy) or RSLogix Micro. No special module configuration is required beyond I/O slot assignment in the hardware configuration tree.
Q: Do you provide a warranty on 1746-OB16 units?
A: Yes. Konmask.com provides a limited warranty on all shipped units. Warranty terms vary by unit condition (new-surplus vs. refurbished). Please request warranty details with your quotation.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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