Moore Automation is a company specializing in the sales of modules and spare parts for world-renowned brands (DCs systems, robot systems, large servo control systems). The company's products include: distributed control systems (DCS), programmable controllers (PLC), MOTOROLA -MVME industrial modules, industrial control communication converters (Anybus), remote output/input modules (RTU), industrial computers (PC), industrial low-frequency screens (IPC), human-machine interface SCSI (50, 68, 80Pin ) AnyBus(Gateway)o The spare parts we sell provide one-year quality guarantee and have undergone strict testing and certification. Now we have become a global sales enterprise of industrial automation spare parts and components.

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1794-OM8: The FLEX I/O Output Module Still Worth Knowing 2026-09-30 Written by Miya Zheng, Director at Moore Automated Miya Zheng serves as Sales Director at Moore Automated and has over 12 years of practical experience in the automation industry. Over the years, she has built a solid understanding of automation technologies, market trends, and customer needs across different sectors. She has been actively involved in developing long-term client relationships, leading sales initiatives, and contributing to business growth in both established and emerging markets. Her experience combines hands-on industry insight with a consistent track record of delivering results. Introduction If you frequently work with older Allen-Bradley control cabinets, you may have encountered the Allen-Bradley 1794-OM8 module. While it is not a new product, that is precisely why it remains a point of interest for maintenance teams today. The 1794-OM8 is an 8-point AC digital output module belonging to the Allen-Bradley FLEX I/O series. Designed for 220/240V AC applications, it provides eight non-isolated outputs. Rockwell Automation has currently designated this product as "End of Life" and announced that it will be officially discontinued on October 31, 2026, with no official replacement product currently planned by Rockwell. That matters when a plant is still running a FLEX I/O system. Replacing one failed module is often much easier than redesigning an entire I/O section. What Does the Allen Bradley 1794-OM8 Actually Do? The basic job is simple. The PLC sends an output command, and the 1794-OM8 switches the connected AC load. The module has 8 outputs, with a nominal output voltage of 240V AC. Its specified output range is 159–264V AC at 47–63 Hz. Each output is rated up to 500 mA at 55°C, and the total module current rating is 4.0 A, based on eight outputs at 500 mA. There are a few numbers worth remembering when checking a replacement: l 8 non-isolated outputs l 159–264V AC output range l 240V AC nominal l 500 mA maximum per output at 55°C l 4.0 A maximum module current l 2.5 mA maximum off-state leakage l 1.5V AC maximum on-state voltage drop at 0.5 A l 7 A surge current for 40 ms, repeatable every 8 seconds l 1/2 cycle maximum signal delay for both OFF-to-ON and ON-to-OFF l 60 mA maximum FLEXBus current at 5V DC l 5.0 W maximum power dissipation at 0.5 A These specifications are more useful than they may look on a catalog page. For example, the 500 mA figure is a per-output limit at 55°C, while 4.0 A is the module-level limit. They should not be treated as two separate ways of increasing the same load capacity. The 1794-OM8 also has eight yellow status indicators, which give technicians a quick field-side indication of the output states. Why Maintenance Teams Still Look for the 1794-OM8 Here is the practical side. Imagine a machine has been running for years with FLEX I/O. The wiring is already in place. The terminal bases are already installed. The PLC program is already configured. Then one output module fails. The problem is no longer “Which new I/O platform should we buy?” The problem is much smaller: Where can we find the correct 1794-OM8? The module is associated with terminal bases including the 1794-TBN, 1794-TBNF, 1794-TBNK and 1794-TBNFK. The installation documentation also notes that the module outputs themselves are not fused and recommends output fusing; when using the 1794-TBNF, a 0.8 A, 250V slow-blow fuse is specified for the output protection arrangement. Another useful number is its physical size: approximately 94 × 94 × 91 mm. The specified operating temperature on Rockwell's current product page is 0…55°C. The module also supports the FLEX I/O architecture's Removal and Insertion Under Power (RIUP) capability when the system and installation conditions permit it. That can be useful during maintenance because a technician may be able to replace an I/O module without shutting down the entire control system. Proper site procedures and electrical safety requirements still come first. For companies maintaining older equipment, this is where sourcing becomes important. A failed module does not necessarily mean the whole control cabinet needs to be modernized. That is why searches for Allen Bradley automation parts often include older FLEX I/O numbers. And when a particular catalog number is no longer in normal production, it can quickly become one of those hard-to-find automation parts that maintenance departments want to keep on hand. Conclusion The Allen Bradley 1794-OM8 is a fairly straightforward module: eight AC outputs, 240V AC nominal operation, 500 mA per output at 55°C, and a 4.0 A module rating. But the details matter. The outputs are non-isolated, the voltage range is 159–264V AC, the maximum off-state leakage is 2.5 mA, and the output response is limited to a maximum of half an AC cycle. Those are the numbers worth checking before ordering a replacement. With Rockwell listing the 1794-OM8 as End of Life and no planned replacement, finding the exact part can become increasingly important for plants that want to keep existing FLEX I/O systems running. For maintenance teams looking for Allen Bradley 1794-OM8, Allen Bradley automation parts, or other hard-to-find automation parts, the old rule still works: check the full catalog number, check the electrical ratings, check the terminal base, and then source the exact module you actually need. Recommended models 1747-M13 22B-B012N104 2097-V34PR6-LM 2093-AM03 1747-M12 22B-B017N104 2098-DSD-005 2093-AM05 1747-L551 22A-A1P5N104 2098-DSD-HV220 2071-AP0 1794-IB16 22A-A2P3N104 1394C-SJT05-A 2071-AP1 1794-OB16 22A-A3P6N104 2198-H015-ERS2 160-BA03NSF1 1794-IA8 25C-D017N104 2198-H025-ERS2 160-BA04NSF1 1794-OA8 25C-D024N104 2094-AM03-S 80190-580-01-R 1794-PS1 25C-D030N104 2094-AM05-S 80190-560-01-R FAQ Q1. How does Moore Automated approach verification of a hard-to-source 1794-OM8?Moore Automated states that it can verify the complete part number, provide product and packaging photos when available, and confirm condition, warranty, lead time and commercial terms in writing. Q2. What should buyers provide when requesting a quotation for the Allen Bradley 1794-OM8?The most useful details are the complete catalog number, required quantity, required condition and destination country. Moore Automated also recommends providing a clear nameplate photo when the exact model is uncertain. Q3. Why is the 1794-OM8 becoming a more important sourcing item for legacy FLEX I/O systems?Rockwell currently identifies the 1794-OM8 as End of Life, with discontinuation scheduled for October 31, 2026 and no planned Rockwell replacement. This makes exact-model sourcing increasingly relevant for existing installations. Q4. Which technical details should be cross-checked before purchasing a replacement 1794-OM8?Check the complete catalog number, 8-point configuration, 240V AC nominal rating, 159–264V AC operating range, 500 mA per-output rating, 4.0 A module rating, non-isolated architecture and compatible terminal base. Q5. Can the 1794-OM8 still be relevant even though it has reached End of Life status?Yes. End of Life describes the manufacturer's lifecycle status; it does not automatically mean that every installed 1794-OM8 system must be replaced immediately. Existing FLEX I/O installations may still require exact spare modules for maintenance and repair. If you have any inquiry,welcome to contact Miya [ Mobile : +86-18020776792 , Email : miya@mvme.cn ] #Oilfield Spare Parts #Power Plant Spare Parts #Steam Turbine Spare Parts #Allen Bradley 1794-OM8 #Allen Bradley automation parts

GE IC660BBA026: Keeping Analog Signals on Track 2026-09-30 Written by Miya Zheng, Director at Moore Automated Miya Zheng serves as Sales Director at Moore Automated and has over 12 years of practical experience in the automation industry. Over the years, she has built a solid understanding of automation technologies, market trends, and customer needs across different sectors. She has been actively involved in developing long-term client relationships, leading sales initiatives, and contributing to business growth in both established and emerging markets. Her experience combines hands-on industry insight with a consistent track record of delivering results. Introduction Walk into an older industrial control room and you may find plenty of equipment that still does its job every day. The challenge is not always the controller itself. Sometimes, one small I/O block can become the part that stops the process from running normally. The GE IC660BBA026 is a good example. Built for the Genius I/O system, this 24/48 VDC analog input block connects field devices that use current signals, including the widely used 4–20 mA signal. It provides six isolated analog input channels, giving a control system a practical way to collect process values from several field instruments. So, what does this actually mean for non-automation engineers? In short, the module enables the control system to monitor field operating conditions. For instance, a transmitter can measure pressure, flow, or other process parameters, convert the readings into current signals, and transmit them to the controller via the IC660BBA026 module. That simple connection can be extremely important. Why the GE IC660BBA026 Still Matters in the Field One useful way to understand the IC660BBA026 is to think of it as a translator between field instruments and the control system. This module features six mutually isolated 4–20 mA input circuits, with each channel capable of providing loop power to current-source devices. This channel-to-channel isolation is particularly useful when a single I/O module must handle multiple field signals. Additionally, the module supports input diagnostics, including under-range/over-range alarms, high/low limit alarms, and wire-break detection. These features not only provide signal values but also assist maintenance personnel in quickly identifying signal faults or wiring issues. Another practical advantage is flexibility in signal processing. The input conversion time can be selected from 16.6 ms to 400 ms. A longer conversion time can improve resolution and noise rejection, while a shorter setting can be useful when faster updates are needed. For an existing Genius installation, this matters because replacing one compatible module can be much simpler than changing an entire control architecture. The original field wiring, controller configuration and network structure may already be established. Finding the correct replacement can therefore save troubleshooting time and reduce unnecessary changes. A Small Module With a Big Maintenance Role This is where the search for hard-to-find automation parts becomes a very real maintenance issue. A failed I/O block does not necessarily mean that a complete production system needs to be redesigned. In many cases, the immediate requirement is much more straightforward: identify the failed component, verify the exact model and configuration, and find a compatible replacement. The GE IC660BBA026 can be particularly useful in applications where multiple analog field signals need to remain connected to a Genius distributed I/O network. Six isolated channels in one block help keep the installation organized, while built-in diagnostics can make troubleshooting easier. The module is also rated for 18–56 VDC operating voltage, with 1 µA input resolution and 0.1% full-scale accuracy at 25°C. This kind of replacement work is not limited to GE equipment. Maintenance departments often source different brands at the same time. One order may involve GE I/O, PLC components, drives and Fanuc spare parts for another machine. What matters is not simply finding a component that looks similar, but matching the exact part number and electrical function. That is especially important with the IC660BBA026 because the closely related IC660BBA106 uses a different power arrangement. The IC660BBA026 is the 24/48 VDC version, while the IC660BBA106 is designed for 115 VAC/125 VDC power. For maintenance teams, that distinction can save a lot of time. Before ordering a replacement, checking the complete model number, power supply, input type and Genius network configuration is a simple step that can prevent a much bigger problem later. Conclusion The GE IC660BBA026 may be a compact component, but its role in an industrial control system is anything but minor. By handling six isolated analog current inputs and providing useful diagnostics and configurable conversion times, it gives existing Genius I/O installations a practical way to keep field signals connected to the control system. For today's maintenance teams, the real benefit is often continuity. When an established automation system is working well, there may be little reason to replace everything simply because one component has failed. Sometimes the smarter approach is much simpler: find the right part, verify the configuration, and get the system moving again. Whether the search involves a GE IC660BBA026, Fanuc spare parts, or other hard-to-find automation parts, accurate model matching remains one of the most important steps in keeping older industrial equipment running. Recommended models 2100P X20AI2237 KC4011X1-BE1 6EP1437-2BA00 CDC40105 CE4006P2 X20AT6402 BZE6-2RN LICO500 8I0IF109.400-1 0AC808.9 SE4304T01 PHC805 7EX290.50-1 3UM161.6 5X00105G14 TRBU1065 VE4032S1T2B1 CE4002S2T2B8 X20MM2436 T5L12-3000 3CP360.60-1 AC114 V600-D8KR04 KJ3102X1-BA1 5DLSDL.1000-00 KC3030X1-BA1 SD315DN10B400 VE4027 F604B SE3006 BWU3759 FAQ Which signal architecture does the IC660BBA026 accommodate? It accepts 4–20 mA and 0–25 mA current signals, making it suitable for current-output transmitters used in industrial process applications. How does channel-to-channel isolation enhance the module's functionality? All six input points are isolated. This separation helps prevent one field circuit from directly affecting the others and supports cleaner signal acquisition in distributed I/O installations. What operating-voltage envelope should engineers verify before deployment? The block operates within an 18–56 VDC range, with a nominal 24/48 VDC configuration. The installed power arrangement should therefore be verified before replacement. Why is the IC660BBA026's selectable conversion time significant? Its input conversion time can be selected from approximately 16.6 ms to 400 ms. This allows the application to balance response speed, resolution and noise rejection according to process requirements. How precise is the analog acquisition capability of IC660BBA026? The documented input accuracy is 0.1% of full-scale reading, with 1 µA resolution. If you have any inquiry,welcome to contact Miya [ Mobile : +86-18020776792 , Email : miya@mvme.cn ] #Oilfield Spare Parts #Power Plant Spare Parts #Steam Turbine Spare Parts #GE IC660BBA026 #Fanuc spare parts

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