top of page

Allen Bradley 1756-OF8IHK

Allen Bradley

PLCs

ControlLogix

1756-OF8IHK

ISO 9001:2015 Certified Quality

Our certified process ensures consistent quality and reliable repairs every time.

​

2-Year Repair Warranty

We stand behind our repairs with an extensive 2-year warranty on parts and labor for your peace of mind.

Fast Turnaround Time

Our efficient process and large parts inventory help minimize your operational downtime.

Expert Component-Level Repair

We find and replace individual failed components, offering a more affordable and effective repair than full replacement.

Free, No-Obligation Quote

Send us your item for a free evaluation and receive a detailed repair quote with no commitment required.

Product Description

The Allen-Bradley 1756-OF8IHK is a durable ControlLogix HART I/O module, rigorously tested to ASTM B845-97 Method G and IEC 60068-2-60 Test Method 2 standards with 20-day exposure, and certified with C-UL-us, CE, RCM, Ex, KC, and EAC. It operates on +/- 24V DC with overvoltage protection and 250V AC isolation voltage (15% rate at 4-20A). Featuring 15-bit resolution across 24mA, it offers 8 isolated differential outputs, one HART modem per channel (estimated 1s scan time with HART enabled), and supports 0-20mA and 4-20mA input ranges, compatible with HART 6 and 7. This open-style, conformal-coated module with 8 points (36 pins) for analog output HART isolated current, provides versatile digital, diagnostic digital, analog, motion control, and specialty I/O capabilities within a ControlLogix controller's local chassis or a chassis linked via ControlNet or EtherNet/IP. Field wiring requires a removable terminal block or Bulletin 1492 wiring interface module.

Is Your Device Showing These Signs?

The Allen Bradley 1756-OF8IHK analog output module commonly experiences issues such as corrupted calibration data requiring recalibration procedures, backplane communication failures stemming from damaged pins or corrupted firmware necessitating firmware upgrades or backplane replacement, and output signal inaccuracies due to faulty digital-to-analog converters (DACs) or damaged output circuitry, which demands module repair or replacement. Field wiring issues, including open circuits or short circuits, also contribute to output signal problems, necessitating thorough wiring inspections and repairs. Resolve power supply fluctuations or failures that affect module performance by ensuring proper voltage levels and power distribution.

Technical specifications

  • The Allen-Bradley 1756-OF8IHK is a robust and certified ControlLogix HART I/O module designed for reliable performance. It features 8 isolated differential outputs with HART modem per channel, supports 0-20mA and 4-20mA ranges, and offers overvoltage protection and isolation. It's compatible with various standards and certifications and can be used in local or networked ControlLogix chassis. Field wiring requires a removable terminal block or wiring interface module.

Our Repair Process for the

1756-OF8IHK

Our repair process for the Allen Bradley 1756-OF8IHK analog output module begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction, be it corrupted calibration data, backplane communication failures, output signal inaccuracies, or field wiring issues. Recalibration procedures are executed to rectify corrupted calibration data, while firmware upgrades or backplane replacement addresses backplane communication failures. Faulty digital-to-analog converters or damaged output circuitry necessitates module repair or replacement. Field wiring undergoes thorough inspection and repair to eliminate open or short circuits. Power supply fluctuations or failures are resolved by ensuring proper voltage levels and power distribution, culminating in rigorous testing to guarantee the module operates within specified parameters before it is returned.

Your Guarantee: Warranty & Lifetime Support

Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.

Comprehensive Repairs You Can Depend On

We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.

Save Significantly

Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Repair flow chart new_edited.jpg

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

Buying Options

To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.

American Flag

Ships from Rochester, NY

bottom of page