Allen-Bradley 1794-OF4I Isolated Analog Output Module | FLEX I/O

Allen-Bradley 1794-OF4I Isolated Analog Output Module – FLEX I/O Series

Imagine a continuous casting line running at full capacity when a sudden ground loop fault corrupts the analog signal driving a critical proportional valve. Without galvanic isolation between the controller backplane and the field wiring, a single voltage spike can cascade into erratic actuator behavior, unplanned downtime, and costly scrap. The Allen-Bradley 1794-OF4I was engineered precisely to prevent this scenario — its channel-to-channel and channel-to-backplane isolation breaks ground loops at the source, keeping your process stable even in the harshest electrical environments.

Within Rockwell Automation’s FLEX I/O platform, the 1794-OF4I occupies the premium tier of analog output modules. While standard non-isolated modules serve benign panel environments, the OF4I is the specification-of-choice for petrochemical, power generation, and heavy manufacturing applications where signal integrity is non-negotiable. Its four independently isolated output channels, combined with the FLEX I/O system’s distributed architecture, make it one of the most widely deployed isolated analog output solutions in global industrial automation.

Technical Specifications

• Catalog Number: 1794-OF4I
• Series: Allen-Bradley FLEX I/O
• Number of Output Channels: 4 (independently isolated)
• Output Signal Ranges: 4–20 mA / 0–20 mA (current); 0–10 V / ±10 V (voltage)
• Resolution: 12-bit (0–4095 counts)
• Isolation: Channel-to-channel and channel-to-backplane galvanic isolation
• Backplane Current Draw: 75 mA @ 5 VDC
• Field-Side Power: 24 VDC (supplied via terminal base)
• Operating Temperature: 0 °C to 55 °C (32 °F to 131 °F)
• Storage Temperature: -40 °C to 85 °C
• Relative Humidity: 5–95% non-condensing
• Certifications: UL, CE, C-Tick
• Compatible Terminal Bases: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TBN
• Communication: Via FLEX I/O adapter (DeviceNet, ControlNet, EtherNet/IP, PROFIBUS, etc.)

Note: All specifications are based on Rockwell Automation published datasheets. Konmask.com does not independently verify or modify manufacturer specifications.

Key Features & Benefits

• True Galvanic Isolation: Eliminates ground loops and common-mode noise that degrade signal accuracy in industrial field wiring environments.
• 4 Independent Channels: Each channel is individually isolated, allowing mixed signal types and independent fault containment — one channel fault does not affect others.
• Flexible Output Ranges: Supports both current (4–20 mA, 0–20 mA) and voltage (0–10 V, ±10 V) outputs, configurable per channel via RSLogix 5000 / Studio 5000.
• 12-Bit Resolution: Provides fine-grained control resolution suitable for precision flow, pressure, and temperature regulation loops.
• FLEX I/O Distributed Architecture: Mounts close to field devices, reducing wiring runs and improving noise immunity compared to centralized I/O racks.
• Hot-Swap Capable: Modules can be replaced under power (with appropriate terminal base), minimizing maintenance downtime.
• Wide Network Compatibility: Works with any FLEX I/O adapter, supporting EtherNet/IP, ControlNet, DeviceNet, PROFIBUS, and more.
• Diagnostic Reporting: Reports open-circuit and out-of-range faults back to the controller for proactive maintenance.

Industry & Equipment Applications

• Oil & Gas: Control valve positioners, flow control loops, wellhead automation panels
• Power Generation: Turbine governor control, boiler feedwater regulation, excitation systems
• Chemical & Petrochemical: Reactor temperature control, pressure regulation, distillation column management
• Metals & Mining: Continuous casting speed control, conveyor drive references, furnace atmosphere control
• Water & Wastewater: Pump VFD speed references, dosing pump control, aeration blower regulation
• Automotive Manufacturing: Paint booth airflow control, press tonnage regulation, robotic welding current references
• Pulp & Paper: Headbox consistency control, dryer steam pressure regulation

System Integration & Compatible Parts

The 1794-OF4I integrates seamlessly within the Allen-Bradley FLEX I/O ecosystem. Typical system configurations include:

• Terminal Bases: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TBN
• EtherNet/IP Adapters: 1794-AENT, 1794-AENTR
• ControlNet Adapters: 1794-ACN15, 1794-ACNR15
• DeviceNet Adapters: 1794-ADN, 1794-ADNK
• PROFIBUS Adapters: 1794-APB
• Controllers: ControlLogix (1756 series), CompactLogix (1769 series), SoftLogix 5800
• Programming Software: RSLogix 5000 / Studio 5000 Logix Designer
• Complementary Analog Input: 1794-IF4I (4-channel isolated analog input)

Contact Konmask.com for assistance with complete FLEX I/O system BOM configuration and compatibility verification.

Our Quality Assurance Process

• Source Verification: All units are sourced from authorized distributors or verified surplus channels with full traceability documentation.
• Visual Inspection: Each module undergoes physical inspection for label integrity, connector condition, and absence of counterfeit indicators.
• Functional Testing: Where applicable, modules are bench-tested for basic power-up and communication response prior to shipment.
• Secure Packaging: Anti-static packaging with moisture barrier bags and foam cushioning to prevent transit damage.
• Documentation: Certificate of conformance and test records available upon request for critical applications.

How to Order

1. Submit an Inquiry: Contact us via the form below or email support@konmask.com with your required quantity and delivery timeline.
2. Receive a Quote: Our team will respond within 1 business day with pricing, lead time, and availability confirmation.
3. Order Confirmation: Upon agreement, we issue a proforma invoice. Payment terms are discussed based on order size and customer history.
4. Shipment & Tracking: We ship via DHL, FedEx, or UPS Express with full tracking. Export documentation (commercial invoice, packing list, COO) provided for international orders.
5. After-Sales Support: Our technical team is available post-delivery for integration questions and warranty claims.

Why Choose Konmask.com?

• Industrial Automation Specialists: We focus exclusively on PLC, DCS, and automation hardware — not a general electronics marketplace.
• Global Supply Network: Access to both new and certified surplus inventory for obsolete or long-lead-time parts.
• Technical Expertise: Our team includes engineers with hands-on experience in Rockwell Automation systems who can advise on compatibility and integration.
• Fast Response: Inquiries answered within 1 business day; urgent requirements accommodated.
• Transparent Documentation: Full traceability and quality documentation provided on request.
• Competitive Pricing: Direct sourcing relationships allow us to offer competitive pricing without compromising on authenticity.

Frequently Asked Questions

Q: What is the difference between the 1794-OF4I and the 1794-OF4?
A: The 1794-OF4I features channel-to-channel and channel-to-backplane galvanic isolation, making it suitable for applications with ground loop risks or noisy field environments. The 1794-OF4 is a non-isolated module intended for cleaner, panel-mounted applications where isolation is not required.

Q: Can the 1794-OF4I output both current and voltage signals simultaneously?
A: Yes. Each of the four channels can be independently configured for either current (4–20 mA / 0–20 mA) or voltage (0–10 V / ±10 V) output via the module’s configuration in Studio 5000 / RSLogix 5000.

Q: Which FLEX I/O adapter is recommended for EtherNet/IP networks?
A: The 1794-AENT or 1794-AENTR (redundant media) adapters are the standard choices for EtherNet/IP connectivity with FLEX I/O modules including the 1794-OF4I.

Q: Is the 1794-OF4I still in production?
A: Rockwell Automation product lifecycle status can change. Konmask.com maintains inventory of both current-production and certified surplus units. Contact us for current availability and lead times.

Q: Do you provide export documentation for international shipments?
A: Yes. We provide commercial invoice, packing list, certificate of origin, and certificate of conformance as standard for international orders. Additional documentation (e.g., MSDS, test reports) is available upon request.

Q: What is your minimum order quantity (MOQ)?
A: There is no strict MOQ. We accommodate single-unit emergency orders as well as bulk procurement. Contact us for volume pricing on orders of 5 units or more.

---

© 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 1794-OF4I Isolated Analog Output Module”,
“description”: “Allen-Bradley 1794-OF4I FLEX I/O 4-channel isolated analog output module with channel-to-channel and channel-to-backplane galvanic isolation. Supports 4-20mA, 0-20mA, 0-10V, and ±10V outputs. 12-bit resolution.”,
“sku”: “1794-OF4I”,
“mpn”: “1794-OF4I”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“category”: “PLC Analog Output Module”,
“url”: “https://konmask.com/products/allen-bradley-1794-of4i-isolated-analog-output-module-flex-io”,
“offers”: {
“@type”: “Offer”,
“url”: “https://konmask.com/products/allen-bradley-1794-of4i-isolated-analog-output-module-flex-io”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”
}
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the difference between the 1794-OF4I and the 1794-OF4?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1794-OF4I features channel-to-channel and channel-to-backplane galvanic isolation, making it suitable for applications with ground loop risks or noisy field environments. The 1794-OF4 is a non-isolated module intended for cleaner, panel-mounted applications where isolation is not required.”
}
},
{
“@type”: “Question”,
“name”: “Can the 1794-OF4I output both current and voltage signals simultaneously?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. Each of the four channels can be independently configured for either current (4–20 mA / 0–20 mA) or voltage (0–10 V / ±10 V) output via the module’s configuration in Studio 5000 / RSLogix 5000.”
}
},
{
“@type”: “Question”,
“name”: “Which FLEX I/O adapter is recommended for EtherNet/IP networks?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The 1794-AENT or 1794-AENTR (redundant media) adapters are the standard choices for EtherNet/IP connectivity with FLEX I/O modules including the 1794-OF4I.”
}
},
{
“@type”: “Question”,
“name”: “Is the 1794-OF4I still in production?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Rockwell Automation product lifecycle status can change. Konmask.com maintains inventory of both current-production and certified surplus units. Contact us for current availability and lead times.”
}
},
{
“@type”: “Question”,
“name”: “Do you provide export documentation for international shipments?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. We provide commercial invoice, packing list, certificate of origin, and certificate of conformance as standard for international orders.”
}
},
{
“@type”: “Question”,
“name”: “What is your minimum order quantity (MOQ)?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “There is no strict MOQ. We accommodate single-unit emergency orders as well as bulk procurement. Contact us for volume pricing on orders of 5 units or more.”
}
}
] }
] }