Allen-Bradley 1746-OB8 Current Sourcing DC Output Module | SLC 500

Allen-Bradley 1746-OB8 Current Sourcing DC Output Module – SLC 500 Series

When a DC output module fails on the production floor, the consequences are immediate and costly: conveyor lines halt, robotic arms freeze mid-cycle, solenoid valves lock in unsafe positions, and every minute of downtime translates directly into lost revenue and missed delivery commitments. In high-throughput manufacturing environments, a single failed output point can cascade into a full line shutdown. The Allen-Bradley 1746-OB8 is the component that stands between your process and that scenario — a purpose-built, field-proven current sourcing DC output module engineered for the demands of continuous industrial operation.

Within the SLC 500 modular I/O family, the 1746-OB8 occupies a critical position as an 8-point current sourcing (PNP) DC output module, designed to drive inductive and resistive DC loads across a wide voltage range. The SLC 500 platform has been a backbone of North American and global discrete manufacturing automation for over three decades, and the 1746-OB8 remains one of its most widely deployed output modules — found in automotive assembly, food and beverage packaging, material handling, and water treatment facilities worldwide.

Technical Specifications

• Module Type: Current Sourcing (PNP) DC Output
• Number of Output Points: 8
• Output Voltage Range: 10–50V DC
• Output Current: 1A per point (continuous)
• Maximum Module Current: 4A (all points energized)
• Output Protection: Electronic short-circuit and overload protection
• Isolation: Optical isolation between field side and backplane
• Backplane Current Draw: 185mA @ 5V DC
• 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
• Wiring: Removable terminal block (RTB)
• Compatibility: SLC 500 fixed and modular chassis (1746 series)
• Certifications: UL, CSA, CE
• Catalog Number: 1746-OB8

Key Features & Benefits

• Current Sourcing (PNP) Architecture: Directly compatible with NPN-input field devices common in Asian and European equipment, simplifying integration without additional signal converters.
• 8 Independent Output Points: Provides granular control over multiple actuators, solenoids, or indicator circuits from a single module slot.
• Wide DC Voltage Range (10–50V): Accommodates 12V, 24V, and 48V DC field devices without rewiring or additional power supplies.
• Electronic Short-Circuit Protection: Protects both the module and field wiring from fault conditions, reducing maintenance intervention and unplanned downtime.
• Optical Isolation: Eliminates ground loops and protects the SLC 500 backplane from field-side voltage transients and noise.
• Removable Terminal Block (RTB): Enables module replacement without disturbing field wiring — critical for minimizing MTTR in live production environments.
• Compact 1-Slot Form Factor: Maximizes chassis density in space-constrained control panels.
• Proven Reliability: Designed to MIL-spec vibration and shock standards, suitable for harsh industrial environments.

Industry & Equipment Applications

• Automotive Manufacturing: Body welding lines, paint shop conveyors, assembly robot end-effector control
• Food & Beverage: Filling machine solenoid control, conveyor indexing, packaging line actuators
• Material Handling: Sortation systems, palletizers, automated storage and retrieval (AS/RS)
• Water & Wastewater Treatment: Pump control, valve actuation, dosing system outputs
• Pharmaceutical: Cleanroom conveyor control, batch process valve sequencing
• Oil & Gas: Wellhead control panels, pipeline valve actuation (non-hazardous zones)
• Building Automation: HVAC damper control, lighting relay outputs, access control interfaces

System Integration & Compatible Parts

The 1746-OB8 is designed for seamless integration within the 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
• DC Input Modules: 1746-IB8, 1746-IB16, 1746-IV8, 1746-IV16
• Power Supplies: 1746-P1, 1746-P2, 1746-P3, 1746-P4
• Removable Terminal Block: 1746-RT25 (if not included)
• Programming Software: RSLogix 500 / Studio 5000 Logix Designer (legacy compatibility mode)

Our Quality Assurance Process

At Konmask.com, every 1746-OB8 unit undergoes a rigorous multi-stage inspection before shipment:

• Visual Inspection: Examination of PCB, terminal blocks, connector pins, and housing for physical damage or counterfeit indicators
• Authenticity Verification: Cross-referencing of date codes, lot numbers, and label markings against known-genuine Allen-Bradley production standards
• Functional Testing: Where applicable, output point activation testing under controlled DC load conditions
• ESD-Safe Packaging: All modules are packed in anti-static bags with foam cushioning to prevent transit damage
• Documentation: Certificate of conformance available upon request

How to Order

1. Submit your inquiry via the Contact / Request a Quote form on this page
2. Provide your required quantity, delivery timeline, and destination country
3. Our team will respond within 1 business day with availability, lead time, and a formal quotation
4. Upon order confirmation, we arrange secure packaging and international freight (DHL, FedEx, UPS, or sea freight for bulk orders)
5. Tracking information and commercial invoice provided upon dispatch

Why Choose Konmask.com?

• Specialized Inventory: We focus exclusively on industrial automation components — Allen-Bradley, Siemens, Schneider, Mitsubishi, Omron, and more
• Global Export Experience: Serving buyers in Southeast Asia, the Middle East, Europe, and the Americas with compliant export documentation
• Technical Support: Our team includes engineers with hands-on SLC 500 and ControlLogix experience — we speak your language
• Competitive Lead Times: Extensive stock depth means faster fulfillment than OEM channels for legacy and hard-to-find parts
• Transparent Sourcing: We disclose product condition (new surplus, refurbished, or used-tested) clearly on every quotation

Frequently Asked Questions

Q: Is the 1746-OB8 current sourcing or current sinking?
A: The 1746-OB8 is a current sourcing (PNP) output module. It sources current to the load when the output is energized. If you require current sinking (NPN), please inquire about the 1746-OB8E or 1746-OB16 variants.

Q: What is the maximum load current per output point?
A: Each output point supports up to 1A continuous current. The total module current draw must not exceed 4A with all 8 points simultaneously energized.

Q: Can the 1746-OB8 be used in a fixed SLC 500 controller?
A: Yes. The 1746-OB8 is compatible with both fixed (1747-L20, L30, L40) and modular SLC 500 chassis configurations.

Q: Do you supply new, surplus-new, or refurbished units?
A: We supply new surplus and factory-refurbished units depending on availability. Condition is always disclosed in the quotation. Contact us to confirm current stock condition.

Q: What is the lead time for international orders?
A: In-stock orders typically ship within 2–3 business days. International delivery via express courier (DHL/FedEx) is 3–7 business days depending on destination.

Q: Can you provide a certificate of conformance or test report?
A: Yes. A certificate of conformance is available upon request at no additional charge. Functional test reports are available for refurbished units.

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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691

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