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NPort 1220/1240 USB-to-Serial Hub User’s Manual
B-5
Revision History
Document Edition Revision Date Revision Details
2
nd
January 27, 2004
1. Update the edition of this
manual on the title page.
2. Change the contact phone
number on the title page.
3. p. 1-3
Add DCD to Serial signal.
Change FIFO from 64 bytes
to 128 bytes.
Change Flow Control to
RTS/CTS, XON/XOFF.
4. p. 1-4
Change 2-wire RS-485
signal to Data+ and Data-
Change FIFO from 64 bytes
to 128 bytes.
Change Flow Control to
RS-485 Data Direction.