Allen-Bradley 1794-OB32P — 32-Point 24VDC Sourcing Digital Output Module | FLEX I/O Platform
Engineering Background
The FLEX I/O platform was engineered by Rockwell Automation / Allen-Bradley to deliver modular, distributed I/O in space-constrained panel environments. The 1794-OB32P is the high-density sourcing digital output variant of this family, purpose-built for applications demanding a large number of discrete output points within a single compact module footprint.
Product Positioning
Targeting process automation, discrete manufacturing, and machine control engineers who require reliable, high-channel-count 24 VDC sourcing outputs with full ControlLogix / CompactLogix / SLC 500 ecosystem compatibility. The 1794-OB32P is the preferred choice when panel real estate is limited and output point density is critical.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1794-OB32P |
| Series | FLEX I/O |
| Manufacturer | Rockwell Automation / Allen-Bradley |
| Module Type | Digital Output (Sourcing) |
| Number of Output Points | 32 |
| Output Voltage Range | 10–31.2 VDC (24 VDC nominal) |
| Output Current per Point | 0.5 A max |
| Total Module Current | 4 A max (all outputs ON) |
| Output Type | Sourcing (PNP) |
| Isolation | Optical isolation, 1500 VAC (field side to logic side) |
| Backplane Current Draw | 75 mA @ 5 VDC |
| Field Power Supply | External 24 VDC (user-supplied) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% non-condensing |
| Dimensions (H × W × D) | Approx. 94 × 23 × 87 mm |
| Weight | 80 g (approx.) |
| Certifications | UL, CE, CSA |
| Compatible Adapters | 1794-AENT, 1794-ADN, 1794-ACN15, 1794-ACNR15, and other FLEX I/O adapters |
| Communication Protocols | EtherNet/IP, DeviceNet, ControlNet (adapter-dependent) |
| Programming Environment | Studio 5000 Logix Designer, RSLogix 5000, RSLogix 500 |
Proven Application Environments
- Automotive Assembly Lines — High-density solenoid valve and actuator control across multi-zone conveyor systems
- Food & Beverage Processing — Hygienic panel designs requiring compact I/O with reliable 24 VDC sourcing outputs
- Water & Wastewater Treatment — Distributed pump and valve control in remote panel enclosures
- Pharmaceutical Manufacturing — Validated control systems requiring traceable, OEM-sourced I/O modules
- Material Handling & Packaging — High-speed sorting, labeling, and palletizing machine control
- Oil & Gas Upstream/Midstream — Distributed control in hazardous-area-adjacent panels with FLEX I/O adapters
Engineering Advantages
- 32 Points in a Single Slot — Maximizes output density; reduces adapter count and panel wiring complexity vs. 16-point alternatives
- Sourcing (PNP) Architecture — Compatible with the majority of industrial sensors and actuators used in Asian and European markets
- Optical Isolation — 1500 VAC field-to-logic isolation protects the backplane and controller from field-side transients and ground faults
- Hot-Swap Capable — Modules can be replaced under power (adapter-dependent) to minimize unplanned downtime
- Broad Adapter Compatibility — Works across EtherNet/IP, DeviceNet, and ControlNet adapters; future-proofs existing FLEX I/O infrastructure
- Compact Form Factor — 23 mm wide module pitch enables high-density I/O banks in standard DIN-rail enclosures
System Architecture & Signal Flow
The 1794-OB32P mounts directly onto a FLEX I/O terminal base (e.g., 1794-TB32 or 1794-TB3G) and connects to the FLEX I/O backplane via the adapter module. The signal flow is as follows:
- Controller (ControlLogix / CompactLogix / SLC 500) sends output data over the selected network (EtherNet/IP, DeviceNet, or ControlNet)
- FLEX I/O Adapter (e.g., 1794-AENT) receives the network packet and distributes output data across the backplane
- 1794-OB32P Module receives the 32-bit output word from the backplane and drives each of the 32 sourcing transistor outputs
- Field Devices (solenoids, relays, indicator lamps, actuators) are powered by the external 24 VDC field supply through the module’s sourcing outputs
Each output channel is individually optically isolated from the backplane logic, ensuring field-side faults do not propagate to the controller.
Sourcing & Quality Verification
- Origin: Sourced from authorized distributors and verified OEM supply chains; no grey-market or counterfeit product
- Inspection Protocol: Each unit undergoes visual inspection, label authenticity verification, and functional power-on testing prior to shipment
- Condition: New (factory-sealed) and Refurbished (tested-to-spec) stock available — condition specified at time of order confirmation
- Documentation: Certificate of conformance and test report available upon request for validated/regulated applications
- Traceability: Lot and date codes recorded for all inventory; full traceability documentation available for pharmaceutical and aerospace customers
Procurement Process
- Submit Inquiry — Contact us via the product page, email support@konmask.com, or WhatsApp/WeChat +0086 19859288691 with your required quantity and delivery timeline
- Quotation & Lead Time Confirmation — We respond within 1 business day with pricing (HKD/USD), stock availability, and estimated ship date
- Order Confirmation — Purchase order or proforma invoice issued; payment via T/T bank transfer, PayPal, or Shopify checkout
- Quality Inspection & Packing — Module inspected, photographed, and packed in anti-static ESD packaging with foam protection
- Shipment & Tracking — Shipped via DHL / FedEx / SF Express with full tracking; export documentation (commercial invoice, packing list, COO) provided
- After-Sales Support — 12-month warranty on new units; 90-day warranty on refurbished units; technical support available throughout project lifecycle
Technical FAQ
Q: Is the 1794-OB32P compatible with my existing 1794-AENT EtherNet/IP adapter?
A: Yes. The 1794-OB32P is fully compatible with all standard FLEX I/O adapters including the 1794-AENT, 1794-AENTR, 1794-ADN, 1794-ACN15, and 1794-ACNR15.
Q: What terminal base is required?
A: The 1794-OB32P requires a 32-point terminal base. The 1794-TB32 (screw terminal) and 1794-TB3G (spring clamp) are the standard compatible bases. Confirm terminal base catalog number when ordering if not already in stock.
Q: Can I mix 1794-OB32P modules with input modules on the same adapter?
A: Yes. FLEX I/O supports mixed I/O configurations on a single adapter. Output and input modules can be combined on the same backplane up to the adapter’s maximum module count and current capacity.
Q: What is the maximum number of modules per adapter?
A: Up to 8 FLEX I/O modules per adapter (adapter-dependent). Verify total backplane current draw does not exceed the adapter’s rated capacity.
Q: Do you provide the EDS file or Add-On Profile (AOP) for Studio 5000?
A: EDS files are available from the Rockwell Automation Product Compatibility and Download Center (PCDC). We can assist with locating the correct file version upon request.
Q: What is the difference between 1794-OB32 and 1794-OB32P?
A: The 1794-OB32P is the protected (current-limited, short-circuit protected) version of the 1794-OB32. The “-P” suffix denotes built-in electronic short-circuit protection per output point, which eliminates the need for external fusing on each channel.
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