I recently came across a data sheet that lacked clarity, making it the second one I've encountered this week. The data sheet pertains to using a 4 to 20mA signal from a pressure transducer with a Click Plus C2-08D2-6C analog input point. I am concerned about protecting the analog input from surges and lightning transients. I have tested it and it seems to work, but I am considering connecting something to terminals numbered 1 and 1'. What steps would you recommend taking in this situation?
Do you need to use the other channel for ground if your transmitter is a 4-wire device? Let's talk about SWAG.
To ensure maximum protection, it is important to connect the earth to ground properly. The two lines are designed for difference mode, while a single line plus earth is for common mode. Make sure to connect the positive to 1 and the output to 1', the signal to 2 and the output to 2', and ground to ground. This configuration only protects against spikes or surges between the signal and ground, not between the supply and signal. However, if your supply's 0v is grounded, it offers both types of protection.
Ken Moore suggested considering using the other channel for ground if your transmitter is a 4-wire device. This is known as a Scientific Wild A$$ Guess (SWAG) for clarification.
In troubleshooting electrical connections, it may be beneficial to connect the positive terminal to 1 and the output to 1'. This was also my initial thought. My 24v power supply lacks a solid ground connection, with the only grounding available being a small metal clip on the DIN rail. I have also posted this query on an A/D forum that specializes in DEHN products, and I am eager to see if they have provided a response.
In line with your concerns about protecting the analog input from potential surges and lightning transients, I'd advise investing in a surge protection device specifically designed for 4-20mA loops. These devices divert excessive voltage away from sensitive components, offering a substantial safeguard. As for connecting something to terminals 1 and 1', it'd depend on the device manufacturer's guidance, the application, and whether the device is designed to accept an external connection at these points. Always consult the manufacturer or a well-versed engineer before making these types of modifications, as it can potentially affect device warranty and performance.
It sounds like you're on the right track in wanting to protect your analog input. Since the data sheet doesn't provide sufficient clarity, my suggestion would be to consider using a signal isolator designed for 4-20mA systems. These isolators usually offer surge suppression and lightning transient protection. Installing it between your pressure transducer and your analog input point could potentially save you some headaches down the line. As for connecting something to terminals 1 and 1', it'd be crucial to first understand what those terminals do within the context of your system before proceeding. Consulting an expert or getting the manufacturer’s clarification could prove beneficial here.
It seems you’re on the right track with wanting to protect your AI from potential surges. One possibility could be to add a surge protector or transient-voltage-suppression (TVS) diode. TVS diodes can be quite effective in protecting against transient overvoltages. Ideally, this would be placed in front of the input to the process controller to mitigate any potential damage. As for connecting something to terminals 1 and 1', that would require more information about your setup, as the implication of this would vary depending on the context. Remember, it's equally important to have an accurate datasheet for reference — you might want to contact the manufacturer for a clearer version or clarification.
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Answer: 1. How can I protect an analog input from surges and lightning transients? - To protect an analog input from surges and lightning transients, you can consider connecting something to terminals numbered 1 and 1'. Additionally, it is recommended to refer to the DEHN BCO CL2 BD24 Wiring Guide for further guidance.
Answer: - When dealing with a 4 to 20mA signal from a pressure transducer connected to a Click Plus C2-08D2-6C analog input point, it is crucial to ensure proper protection against surges and lightning transients. Following the recommendations in the DEHN BCO CL2 BD24 Wiring Guide can help address these concerns effectively.
Answer: - Failing to protect analog inputs from surges and lightning transients can lead to damage to the equipment, potential data loss, and system downtime. Implementing suitable protection measures is essential to prevent such risks.
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