Greetings! Recently, the company I have joined still has some spare valves left over from previous orders. Now, we are in need of additional valves for a different machine, but the ones we have are AS-interface actuators. The valves in question are from the brand SPX, specifically the CU41 plus T model. I am wondering if there is a way to repurpose these valves as regular actuators, operating on a 24vdc system with ON and OFF functionalities. Perhaps there is a module available or a specific wiring modification that can be made to achieve this. These modified valves will be integrated with an AB PLC (module 1734-OB4E). I am considering cost-effective solutions and would prefer not to invest in the AS interface gateway and complete setup. I am exploring options to either purchase new regular 24vdc valves or a new SAi setup, or potentially modifying the existing ASi valves to function as regular actuators. Any advice on the best course of action would be greatly appreciated. Thank you.
We have utilized numerous units of this valve on a large ASI-controlled system. There is a specific head system named e CU4 D4 IECE that can be attached directly to the valve. However, we have not actually used these heads ourselves. Our buyer mistakenly received ASI heads as spare parts, prompting us to explore the option of purchasing different control heads for replacement. The ASI system operates at around 30 volts, so it is likely that the solenoids and sensors are also 24 volts. This suggests the possibility of connecting the sensors and solenoids directly to the PLC via 24-volt DC inputs/outputs. It is advisable to confirm the voltage of the sensors and solenoids when in use. If they indeed operate at 24 volts, then there should be no issue connecting them to a connector block. One of our engineers had a similar experience when replacing a valve on a non-ASI system with an ASI valve. It remains unclear whether the engineer replaced the sensors and solenoid components or simply wired them directly.
Parky mentioned that they have used numerous units on a large ASI controlled system. There is a specific direct connect head system, known as the e CU4 D4 IECE, that can be attached to the valve. Although Parky has never used this system personally, they are aware of it because their buyer ordered some ASI heads as backups but received the wrong ones. This mix-up revealed that it is possible to purchase different control heads and swap them out. Parky suggests checking the voltage of the sensors and solenoids to ensure compatibility with the ASI system, which typically operates at around 30v. If the sensors and solenoids run on 24v, then they can be connected directly to a PLC using 24v dc inputs/outputs. One of Parky's colleagues successfully integrated an ASI valve into a non-ASI system by potentially replacing the sensors/solenoid or wiring them directly. If there are any questions or concerns about wiring directly, feel free to ask for clarification or assistance.
Hi Marcktony, it's been a while since I've seen these in person, but in theory, you could potentially bypass the control board. Typically, these valves contain simple solenoids. However, it may be more beneficial to order the correct head as Parky suggested, to avoid frustration or causing damage to a functioning ASi head. Depending on the type of valve body you have, many of these heads are interchangeable. For example, a GEA or Burkert head may be a suitable alternative. Ultimately, the compatibility will vary depending on the specific valve. Explore the CU4 Series - Valve Control Units for controls with direct connect or AS-i connection. Visit the SPX Flow website for more information: https://www.spxflow.com/assets/original/apv-cu4-as-interface-atex-zone-2-gb.pdf.
The black module located in the head, which I believe used to be known as APV valves, can be ordered separately. The ASI module is a black component with built-in sensors and adjuster screws for position adjustments. It features a connector block for sensors and solenoids, as well as a 2-pin block for ASI connection. Direct connect heads are likely similar to ASI heads, but with different wiring consisting of +V, -V, two sensor wires, and a solenoid wire. Consider reaching out to the supplier for pricing on the direct connect heads, which may also be APV valves. It is important to note that using an ASI valve in place of a standard one may require disconnecting sensors and solenoids and making appropriate connections. Due to potential space constraints, standard proximities may not fit in the ASI head. As I am retired and no longer have access to valve heads, testing the signals or wiring is not feasible. Consider swapping out heads with direct connect ones if needed.
Parky noted that the black module in the head, also known as APV valves, can be ordered separately. The ASI module is a black component with built-in sensors and adjuster screws for position adjustment. It has a connector block for sensor and solenoid connections, as well as a 2-pin block for the ASI connection. Direct connect heads are likely identical to ASI heads but with different wiring. It is possible to purchase direct connect heads from the supplier for those in need. If unsure about the compatibility, it may be best to replace the heads with direct connect ones. Unfortunately, since retiring, Parky no longer has access to valve heads to verify this information.
Hey! It's a tricky situation. Repurposing AS-interface actuators to operate on a regular 24vdc system might not be a straight-forward job and could potentially interfere with the reliability of your system. While it is technically possible to make modifications or use a module to achieve this, it might end up costlier and more time-consuming than simply investing in regular 24vdc valves. Especially since you mentioned incorporating these with a 1734-OB4E module, compatibility and potential performance issues also come to the picture. Before making any decisions, have a word with the SPX tech support. They might have a viable solution for you considering they are more familiar with their product implications. Sometimes, simple is best!
Hey there! From what I understand, the CU41 plus T model you have operates over AS-interface. While repurposing them might seem like a cost-effective solution, modifying AS-Interface actuators to function as simple on/off valves with a 24vdc system might be complex and may hamper their functionality, causing problems down the line. Additionally, if the modification isn't done properly, it could void the warranty. If you're on a tight budget, a potential solution might be to look at second-hand or reconditioned regular 24 VDC valves. These would be functionally suitable, cost-effective, and less risky than attempting to modify your existing ASi valves. However, if budget allows, I'd generally recommend new 24VDC valves to ensure you're getting optimal performance and reliability.
Hi there! It appears you're in a bit of a conundrum with your system setup. While it's technically possible to repurpose the existing AS-interface (ASi) valves to perform as regular 24VDC actuators, the modification process can be rather complex and usually requires deep knowledge of electrical systems. This might actually end up costing more in terms of time and potential troubleshooting. There's also the risk of system instability or safety issues if not done correctly. My suggestion would be to consider selling your ASi valves and purchasing the 24VDC valves that you require. This way you ensure compatibility with your AB PLC and eliminate the potential hassle of untested modifications. This approach should be much smoother from a process control and stability standpoint.
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Answer: - Yes, it is possible to repurpose AS-interface valves as regular actuators for a 24vdc system with the right modifications.
Answer: - The AS-interface valves in question are from the brand SPX, specifically the CU41 plus T model.
Answer: - Yes, the repurposed AS-interface valves can be integrated with an AB PLC using a module such as 1734-OB4E.
Answer: - The discussion mentions exploring options to modify the existing ASi valves to function as regular actuators without investing in the AS interface gateway and complete setup.
Answer: - The decision to modify existing AS-interface valves or purchase new components would depend on factors like cost, feasibility, and the specific needs of the project.
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