Hello, I am in the process of upgrading from a MicroLogix 1100 to a CompactLogix 5380, incorporating a 5069-IY4 module. I will be utilizing a two-wire loop-powered instrument and want to confirm the correct wiring setup. The 4-20mA signal will be connected to IN 0+, but do I also need to connect anything to the RTD-/COM terminal? I assume the other terminals are for RTD devices. Any guidance on this matter would be greatly appreciated. Thank you! Sincerely, Kilowatt76
When transitioning from a MicroLogix 1100 to a CompactLogix 5380 and utilizing a 5069-IY4 module for a two-wire loop-powered instrument, it is important to ensure the correct wiring. The 4-20mA signal should be wired to the IN 0+ terminal. Are there any additional connections needed to the RTD-/COM terminal? It is likely that the other terminals are for RTD devices. Refer to the manual for specific examples. For loop powered instruments, the 24vdc+ should be wired to the sensor +input, the + input should be wired to the sensor -input, and the - input should be jumpered to the module RTD/COM. Additionally, the 24vdc - should be wired to the module RTD/COM. If you need further assistance, don't hesitate to ask. Thank you!
I was unaware of this particular card. It seems to offer a great deal of versatility and flexibility.
Robertmee mentioned that there are examples in the manual for loop powered systems. In these systems, the 24vdc+ should be wired to the sensor's positive input, and the negative input should be connected to the sensor's - input, while also jumping to the module's RTD/COM. The 24vdc- should be wired to the module's RTD/COM. Do you think this setup matches the one depicted in the attached file?
Kilowatt76 confirmed their approval of the attached file. Click to view the document.
Hi Kilowatt76, glad to hear you're stepping up your system! You're correct in that the 4-20mA signal will be hooked to the IN 0+ terminal. As for the RTD-/COM terminal, there's no need to connect anything to it if you're solely working with a two-wire loop-powered instrument. The RTD-/COM terminal, as you guessed, is indeed for RTD devices and shouldn't impact your current setup. Hope this helps, and best of luck with your project!
Hi Kilowatt76, you've made a good choice with the CompactLogix 5380, it's a significant upgrade! Regarding your question, for a two-wire loop-powered instrument with a 4-20mA signal, you're correct in using IN 0+. However, you don't need to worry about the RTD-/COM terminal for the setup you're describing; as you suspected, they're typically used for resistance temperature detectors (RTDs). Make sure to also connect the other wire of your transmitter to a common or ground terminal depending on the specifics of your setup. Be mindful when wiring and double-check everything before powering up to avoid measurement errors or potential damages. Hope this helps.
Hey Kilowatt76, you're spot on. The terminals you're citing are indeed intended for RTD devices. With your 4-20mA signal, you'll only need to be concerned with IN 0+. Your two-wire loop-powered instrument should be just fine with this setup and no connection needs to be made at the RTD-/COM terminal in this particular case. Don't hesitate to ask if you've got any more questions. Happy wiring!
Hey Kilowatt76! For your setup with the 5069-IY4 module, since you’re working with a two-wire loop-powered instrument, you only need to connect your 4-20mA signal to IN 0+. You won’t need to connect anything to the RTD-/COM terminal, as that’s specifically for use with RTD sensors, which aren’t part of your current configuration. Just ensure that your power supply for the transmitter is correctly set up, and you should be good to go. If you have any more questions as you proceed, feel free to ask!
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Answer: 1. What is the correct wiring setup for connecting a two-wire loop-powered instrument to a CompactLogix 5380 with a 5069-IY4 module? - The 4-20mA signal from the instrument should be connected to the IN 0+ terminal. No connection is needed for the RTD-/COM terminal.
Answer: - No, the RTD-/COM terminal is not used when connecting a two-wire loop-powered instrument. It is primarily for RTD devices.
Answer: - The other terminals on the 5069-IY4 module are primarily for RTD devices. They are not utilized when connecting a two-wire loop-powered instrument.
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