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| — | can_faq:can_faq_blowuprs232 [2018/08/21 23:08] (current) – created - external edit 127.0.0.1 | ||
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| + | ====== Can CAN blow up RS232 transceivers ====== | ||
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| + | [[mailto: | ||
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| + | Yes it can! Perhaps the CAN trasceiver 82C250 is used on the I/O module. This | ||
| + | transceiver is only able to sustain a voltage of -8V to +18V at CAN_H | ||
| + | and CAN_L. On a RS232 you have -12V to +12V. | ||
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| + | Using the CAN transceiver 82C251 gives more immunity because this | ||
| + | transceiver can sustain a voltage of -36V to +36V at CAN_H and CAN_L | ||
| + | and the price of this chip is quite the same as for the 82C250. | ||
