1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module
1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module
1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module
    1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module
1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module

1794-OE8H | Allen-Bradley Flex 8-Point Analog Output Module

Part #: 1794-OE8H Manufactured by: Allen-Bradley
$2,969.00
$2,969.00
2 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
The 1794-OE8H analog module from Allen-Bradley is a FLEX I/O HART module.
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
Contact Us!

Talk to a real expert.

phone
+1 (828) 222-3490
email
sales@iqelectro.com
Mon–Sat, 7:00 AM – 8:00 PM (EST)
warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1794-OE8H
IQElectro offers a free 2-year warranty on all products. You can trust that every purchase is a reliable investment in the future of your company. Warranty Terms
2-3 Day Free Shipping
Packed Ready to Ship
24/7 Expert Support
Return within 30-Days
IQElectro BBB Business Review
IQElectro is Not an authorized distributor for Allen-Bradley
Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1794-OE8H

Description / Specifications

Description 

The Allen-Bradley 1794-OE8H is an 8-point analog output module designed for FLEX I/O systems, providing stable voltage and current output performance for in-cabinet control applications. It delivers 13-bit resolution, fast response times, and HART signaling support, making it suitable for demanding industrial analog output requirements.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Part Number 1794-OE8H
Manufacturer Allen-Bradley
Category PLCs / Machine Control
Subcategory FLEX I/O Analog Output Module
Number of Outputs 8 single-ended, non-isolated
Voltage 24 VDC
Resolution 13 bits
Absolute Accuracy 0.1% Full Scale @ 20°C
Accuracy Drift 0.010% FS across 0–55°C
Conversion Type Sigma-delta
Step Response 4 ms to 99% FS
Output Data Format Configurable
Functional Output Range >15V @ 22 mA; >22V @ 0 mA
Isolation Voltage 50V continuous, tested at 850V DC for 1 s
Channel Isolation None (channels are non-isolated)
Power Supply 24V DC nominal (19.2–31.2V DC)
FlexBus Current 80 mA @ 5V DC; 190 mA @ 24V DC
Power Dissipation 6.1 W max
Thermal Dissipation 20.8 BTU/hr max
Indicators 8 red fault LEDs, 8 yellow HART LEDs, 1 green power LED
Recommended Terminal Bases 1794-TB3G, 1794-TB3GS
Mounting DIN rail or panel
Enclosure None (open-style)
Temperature Rating –20°C to +55°C
Dimensions (H × W × D) 46 × 94 × 75 mm (1.8 × 3.7 × 2.95 in.)
Weight 200 g (7.05 oz)
Wiring Category Category 2 signal and power ports
Wiring Type Shielded wiring recommended
Applications In-cabinet analog output control
Certifications CE, UL, C-UL, KC, GOST, C-TICK

 

 

Information About 1794-OE8H

The Allen-Bradley 1794-OE8H is an eight-channel analog output module designed for FLEX I/O environments requiring fast, accurate, and HART-capable analog control. Its 13-bit resolution, sigma-delta conversion, and 4 ms step response allow precise output of analog signals across both voltage and current ranges. The module integrates seamlessly with 1794-TB3G or TB3GS terminal bases and supports full HART diagnostics via dedicated LED indicators, simplifying system monitoring and troubleshooting. With a wide operating temperature range, robust electrical specifications, and efficient power consumption, the 1794-OE8H is engineered to deliver reliable analog performance in industrial automation systems.

Key Features:

  • Eight high-resolution analog outputs: provides flexible voltage and current output options with 13-bit resolution for precise analog control across multiple channels.
  • HART-enabled diagnostics: features eight dedicated yellow HART LEDs to support field device communication, troubleshooting, and advanced monitoring functions.
  • Fast analog response performance: offers a 4 ms step response to 99% full scale, ensuring stable and timely analog output adjustments in dynamic control environments.
  • Configurable output data formats: supports multiple output ranges and formats, enabling compatibility with a broad variety of actuators and analog devices.
  • Robust accuracy and stability: maintains 0.1% full-scale accuracy at 20°C with extremely low temperature drift, ensuring consistent performance across harsh temperature variations.
  • Efficient FLEX I/O integration: requires only 80 mA from the 5V backplane and 190 mA from 24V, minimizing load on the system power budget while enabling modular expansion.
  • Comprehensive status indication: provides 8 red fault LEDs, 8 HART LEDs, and one power LED to assist operators in real-time diagnostics and channel-level status monitoring.
  • Industrial-grade electrical protection: includes 50V continuous isolation and 850V DC test compliance between field and system circuits for enhanced operational reliability.
  • Compact, in-cabinet installation: open-style FLEX form factor allows DIN rail or panel mounting, optimizing control cabinet space for modular I/O design.

The 1794-OE8H delivers the reliability and precision required for multi-channel analog output, HART-enabled diagnostics, and high-resolution signal control in distributed FLEX I/O automation systems.

Get fast quote and compatibility check
Compatibility check available   ·   Alternative parts suggested
Get a response to your request within 5 minutes
Talk to a real industrial automation specialist.
We verify compatibility, suggest alternatives, and provide fast quotes.
Something went wrong, please try again
Form image
Arty A.
Senior Sales Manager
Daniel S.
Parts Specialist
Request successfully sent!
Estimated response time: 1 to 5 minutes.
Frequently Asked Questions about 1794-OE8H
Question: What is the 1794-OE8H?
Date Update:19/06/2025
Answer:

The Allen-Bradley 1794-OE8H is an 8-channel analog output module in the FLEX I/O family that supports HART (Highway Addressable Remote Transducer) communication protocol. It is designed to provide current output (typically 4–20 mA or 0–20 mA) signals to analog devices such as valves, actuators, and field instrumentation, while also enabling bidirectional communication with HART-enabled devices.

Question: How do I wire the 1794‑OE8H module?
Date Update:19/06/2025
Answer:
  • The module mounts onto a 1794-TB3G/S terminal base, which provides wiring access
  • Power wiring:
    +24 V to terminal C‑34 and pass-through C‑50 for daisy-chaining.
    0 V (COM) to C‑35 and pass-through C‑51.
  • Output signals:
    Attach each of the 8 outputs to terminals for 0–20 mA or 4–20 mA current loops.
    Outputs share a common +24 V supply.
  • Grounding & shields:
    Use shielded wiring; terminate shields at chassis ground or shield bus, not directly on module pins
    Ensure proper grounding according to publication 1770‑4.1 to prevent noise
Question: Can I wire 2‑wire and 3‑wire transmitters?
Date Update:19/06/2025
Answer:

Yes. The terminal base supports both:

  • 2-wire HART transmitters: loop-powered, connect across output and COM.
  • 3-wire devices: connect +24 V, output, and COM as required.

Refer to 1794‑IN109 wiring diagrams (see pages 54–57) for clear illustrations on both wiring styles

Question: What LED indicators show on the 1794-OE8H module?
Date Update:19/06/2025
Answer:
  • PWR: Solid green when +24 V applied.
  • O0–O7: Indicate output active.
  • Channel Fault: Flashing red indicates a fault—check wiring or device connectivity.
Question: How do I daisy-chain power between bases?
Date Update:19/06/2025
Answer:
  • From Base 1: wire +24 V to C‑34 and COM to C‑35.
  • Jumper Base 1's +24 V C‑50 to the next base's C‑34, and COM C‑51 to next base's C‑35.
  • This provides continuous power feed through multiple bases.
IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1794-OE8H is an 8-point analog output module designed for FLEX I/O systems, providing stable voltage and current output performance for in-cabinet control applications. It delivers 13-bit resolution, fast response times, and HART signaling support, making it suitable for demanding industrial analog output requirements.

 

 

Technical Specifications 

Condition New / Never Used Surplus
Part Number 1794-OE8H
Manufacturer Allen-Bradley
Category PLCs / Machine Control
Subcategory FLEX I/O Analog Output Module
Number of Outputs 8 single-ended, non-isolated
Voltage 24 VDC
Resolution 13 bits
Absolute Accuracy 0.1% Full Scale @ 20°C
Accuracy Drift 0.010% FS across 0–55°C
Conversion Type Sigma-delta
Step Response 4 ms to 99% FS
Output Data Format Configurable
Functional Output Range >15V @ 22 mA; >22V @ 0 mA
Isolation Voltage 50V continuous, tested at 850V DC for 1 s
Channel Isolation None (channels are non-isolated)
Power Supply 24V DC nominal (19.2–31.2V DC)
FlexBus Current 80 mA @ 5V DC; 190 mA @ 24V DC
Power Dissipation 6.1 W max
Thermal Dissipation 20.8 BTU/hr max
Indicators 8 red fault LEDs, 8 yellow HART LEDs, 1 green power LED
Recommended Terminal Bases 1794-TB3G, 1794-TB3GS
Mounting DIN rail or panel
Enclosure None (open-style)
Temperature Rating –20°C to +55°C
Dimensions (H × W × D) 46 × 94 × 75 mm (1.8 × 3.7 × 2.95 in.)
Weight 200 g (7.05 oz)
Wiring Category Category 2 signal and power ports
Wiring Type Shielded wiring recommended
Applications In-cabinet analog output control
Certifications CE, UL, C-UL, KC, GOST, C-TICK

 

 

Information About 1794-OE8H

The Allen-Bradley 1794-OE8H is an eight-channel analog output module designed for FLEX I/O environments requiring fast, accurate, and HART-capable analog control. Its 13-bit resolution, sigma-delta conversion, and 4 ms step response allow precise output of analog signals across both voltage and current ranges. The module integrates seamlessly with 1794-TB3G or TB3GS terminal bases and supports full HART diagnostics via dedicated LED indicators, simplifying system monitoring and troubleshooting. With a wide operating temperature range, robust electrical specifications, and efficient power consumption, the 1794-OE8H is engineered to deliver reliable analog performance in industrial automation systems.

Key Features:

  • Eight high-resolution analog outputs: provides flexible voltage and current output options with 13-bit resolution for precise analog control across multiple channels.
  • HART-enabled diagnostics: features eight dedicated yellow HART LEDs to support field device communication, troubleshooting, and advanced monitoring functions.
  • Fast analog response performance: offers a 4 ms step response to 99% full scale, ensuring stable and timely analog output adjustments in dynamic control environments.
  • Configurable output data formats: supports multiple output ranges and formats, enabling compatibility with a broad variety of actuators and analog devices.
  • Robust accuracy and stability: maintains 0.1% full-scale accuracy at 20°C with extremely low temperature drift, ensuring consistent performance across harsh temperature variations.
  • Efficient FLEX I/O integration: requires only 80 mA from the 5V backplane and 190 mA from 24V, minimizing load on the system power budget while enabling modular expansion.
  • Comprehensive status indication: provides 8 red fault LEDs, 8 HART LEDs, and one power LED to assist operators in real-time diagnostics and channel-level status monitoring.
  • Industrial-grade electrical protection: includes 50V continuous isolation and 850V DC test compliance between field and system circuits for enhanced operational reliability.
  • Compact, in-cabinet installation: open-style FLEX form factor allows DIN rail or panel mounting, optimizing control cabinet space for modular I/O design.

The 1794-OE8H delivers the reliability and precision required for multi-channel analog output, HART-enabled diagnostics, and high-resolution signal control in distributed FLEX I/O automation systems.

Check Out These Related Products