1794-OF4I Analog Output Module Allen-Bradley Flex I/O Series

Manufacturer: Allen-Bradley
Product No.: 1794-OF4I
Condition： In stock
Product Type: Analog Output Module
Product Origin: USA
Payment: T/T, Western Union
Weight: 150g
Shipping port: Xiamen
Warranty: 12 months

Quantity

Selected quantity: 1

Estimate delivery times: 12-26 days (International), 3-6 days (United States).

Return within 30 days of purchase. Duties & taxes are non-refundable.

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Product Introduction

Welcome to Global PLC Spare HUB Review for the Allen-Bradley 1794-OF4I Flex I/O Isolated Analog Output Module. This high-precision signal conversion unit delivers four isolated output channels for demanding industrial control networks. Designed specifically for the modular Flex I/O Series, this device provides configurable voltage and current signals to drive actuators, valves, and field instruments safely. Global PLC Spare HUB's Insight emphasizes that using fully isolated output channels prevents ground loops and protects control processors from catastrophic field-side electrical surges.

Configuration Breakdown & Modular Architecture

Manufacturer & Brand: Rockwell Automation / Allen-Bradley
Catalog Number & Series: 1794-OF4I / Flex I/O Series
Module Classification: Flex I/O Isolated Analog Output Module (Digital-to-Analog Converter)
Channel Configuration: Four (4) fully isolated output channels supporting user-configurable ranges
Compatible Terminal Bases: 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN units

Technical Specifications

Engineering Parameter	Technical Performance Metric
Output Signal Types	4-20 mA, 0-20 mA, +/-10 VDC, 0-10 VDC, +/-5 VDC, 0-5 VDC
Resolution & Conversion	15 bits plus sign (0.320 mV/cnt voltage, 0.656 mA/cnt current)
Update Rate & Response	2.5 or 5.0 ms all channels; step response to 63% is less than 25 microseconds
External Power Supply	Nominal 24 VDC (range: 19.2 to 31.2 VDC including 5 percent AC ripple)
Bus Current Draw	50 mA FlexBus current at 5 VDC nominal voltage
Thermal Dissipation	Maximum 16 BTU per hour at 31.2 VDC operating limit

Installation Guidelines

Mount the 1794-OF4I securely onto a standard industrial DIN rail or directly to a backplate enclosure sub-panel.

Snap the module firmly onto a compatible terminal base such as the 1794-TB3TS to establish proper FlexBus communication.

Connect an external 24 VDC power source supplying between 19.2 and 31.2 VDC to the designated power terminals.

Ensure field wiring uses properly shielded twisted-pair cables to maintain signal fidelity and minimize electromagnetic noise.

Commissioning and Maintenance Convenience

Factory calibration ensures precise 0.1 percent full-scale accuracy at 25 degrees Celsius right out of the box.

Configurable update rates allow automation engineers to balance loop response times against process stability requirements.

Module diagnostics report open-load conditions and power supply anomalies instantly through the host controller software.

Compatibility & Integration

Integrates seamlessly with any standard Flex I/O communication adapter across disparate industrial networks.

Fully supported within Studio 5000 and RSLogix programming environments for straightforward tag configuration.

Certification Information

Approved for safe operation in hazardous industrial environments subject to local electrical classifications.

Built to withstand harsh shock up to 30g and operational vibration up to 5g at 10 to 500 Hz.

Package Contents & Warranty

One Allen-Bradley 1794-OF4I Flex I/O Isolated Analog Output Module unit.

Standard protective hardware packaging and safety documentation inserts.

Backed by a comprehensive 12-month warranty starting from the original purchase date.

Shipping and Logistics

Immediate order dispatch within 24-48 hours for items currently stocked in our warehouse.

Reliable worldwide express courier delivery managed via FedEx, UPS, and DHL.

Secure anti-static packaging protects sensitive internal microprocessors during international transit.

Typical Applications and Diagnostic Capability

Application 1: Controlling modulating control valves and variable speed drives in chemical processing plants.

Application 2: Transmitting precise analog setpoint signals to remote actuators across distributed manufacturing lines.

Diagnostic Capability: Identifies channel overload conditions, voltage sags, calibration drift, and communication timeouts before process downtime occurs.

Frequently Asked Questions (FAQ)

Why do both voltage and current output terminals output zero until module configuration is complete?

The module defaults to an unconfigured safe state with zero outputs to prevent erratic actuator movement during initial power-up sequences.

What is the maximum continuous overload protection limit for individual channels on the 1794-OF4I?

Each channel can safely withstand a maximum overload of 30 Volts continuous or 32 mA continuous for one channel at a time.

How does temperature variation affect the absolute accuracy of the voltage versus current terminals?

Voltage terminals drift by 0.0012 percent full scale per degree Celsius, while current terminals drift by 0.0025 percent full scale per degree Celsius.

What selection criteria should guide the choice between terminal bases like the 1794-TB3 and 1794-TBN?

Select base units based on wiring density, spring-clamp versus screw-clamp preferences, and required continuous isolation voltage ratings (up to 250V for TBN).

How can maintenance personnel verify that the external power supply is operating within acceptable limits?

Measure the DC voltage across the power terminals with a digital multimeter to confirm it stays strictly between 19.2 and 31.2 VDC including ripple.

12-Month Comprehensive Warranty

Every part supplied by Global PLC Spare Hub is covered by a 12-month warranty from the date of invoice.

Coverage: Functional defects and hardware failures under normal operating conditions.
Commitment: We provide immediate repair, replacement, or a full refund for any verified defective components to minimize your operational downtime.

Returns & Exchange Policy

We offer a 30-day return policy to ensure you receive the exact part your system requires.

Eligibility: Returns are accepted for uninstalled items in their original, factory-sealed packaging.
RMA Process: Please contact our support team to obtain a Return Merchandise Authorization (RMA) number before shipping.
Fast Processing: Refunds or exchanges are processed within 3–5 business days after the returned item passes our technical inspection.

Need Technical Assistance?Not sure if this part is compatible with your system? [Consult our Engineers] before purchasing to ensure 100% compatibility.