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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. | ||
