6/28/2022 6:32 AM | |
Joined: 2/14/2022 Last visit: 6/30/2022 Posts: 3 Rating: (0) |
Hi all, Got an issue with installed CT to S331 input module. Installed a CT on motor cable to meaure the current. The wiring of CT is applied with 15V to +Uc and -15V to -Uc. The M and 0 point connects to PLC input(M- and M+). After system energization, found that all voltage input to the input module were saturation(over 11V). After disconnection this CT from module, the rest of the signals were back to normal on PLC. Measure the 0 and M point on CT, which is both 13V to earth. Believed the measuring range for CT is suitable and no issue with wiring. As two different CTs were installed on different motor cable, got the same problem with voltage saturation. Not sure the wiring is incorrect? For comments. Appreciate. AttachmentWiring spec.docx (523 Downloads) |
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