What is the behavior of Channel 0 in a BMXNOM0200 when used on an M580 ERIO drop?

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Issue
What is the behavior of Communication Channel 0 in a BMXNOM0200 when used on an M580 ERIO drop?

Product Line
M580
X80 IO
Unity/Control Expert

Resolution
The behavior of Channel 0 on a BMXNOM0200 is different when used in an ERIO drop than when used in a local rack.

When the BMXNOM0200 is used on a local IO rack and Channel 0 is configured for Master mode, either RS232 or RS485 can be selected.
When the BMXNOM0200 is used on a local IO rack and Channel 0 is configured for Slave mode, either RS232 or RS485 can be selected.
When the BMXNOM0200 is used on an ERIO drop and Channel 0 is configured for Master mode, either RS232 or RS485 can be configured.
When the BMXNOM0200 is used on an ERIO drop and Channel 0 is configured for Slave mode, the only selection is RS485. RS232 cannot be selected.

Note:

If RS232 for Slave mode is required with a BMXNOM0200 Channel 0 on an ERIO drop, then it is recommended to use an RS232 to RS485 converter with this port.