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Steve Cheung

FX2N-128MT and FX2N-128MT ES/UL

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Hi All, Anyone can suggest as below: We have existing plc FX2N128MT ES/UL which have some fail i/o. We would like to replace it. Unfortunately we have buy a FX2N-128 MT wihout ES/UL (maybe Japanse standard). The old connection is: s/s is connected to 0v. When we replace it to it, can not work. Is there anything we can do to make it work? Thank you

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The difference between the 128MT and 128MT-ES/UL is the outputs, not the inputs. The MT is the Japanese spec, which has one type of transistor outputs. The ES/UL is the opposite type. So no, you cannot replace one with the other.

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Actually there are no difference regarding outputs between FX2N-128MT and FX2N-128MT-ES/UL, both are NPN output type. The difference between them (MT and MT-ES/US) is the input, because the inputs of MT type (Japanese version) are only NPN input and the MT-ES/UL type can be configured to NPN and PNP (if you shortcut S/S to 0V you have PNP input, if you shortcut S/S to 24V you have NPN input). So if the old one has a shortcut between S/S and 0V you have PNP input type, then you cannot use the Japanese version, because this one has only NPN input type. I hope it can help you. Regards, Carlos

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Or you can replace the faulty transistors. I have replaced many faulty output transistors and relays. It is not too hard to get to the I/O board, everything unplugs.

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Per manual JY992D66301, section 6.3, the MT unit is Japanese spec with sink outputs, and the MT-ESS is sourcing outputs. They are wired completely differently. I see no MT-ES mentioned in this manual, only MT-ESS.

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I attached a extracted pages from Hardware Manual of FX2N. These pages show the meaning of each letter. I attached also another part of hardware manual of the old FX, where you can find in details the meaning of the letters –ES. FX2N_HARDWARE_model_name.pdf Hardware_model_name_Serie_FX.pdf

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Dear All, Thanks a lot for all your information. Best regards, Steve

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