Black Box 2-Port RS-232/422/485 User Manual page 7

2-PORT RS-232/422/485 PCI HOST ADAPTER
CONTENTS (continued)
Appendix C: Electrical Interfaces...............................................................28
C.1 RS-232.................................................................................................28
C.2 RS-422.................................................................................................28
C.3 RS-485.................................................................................................29
Appendix D: Asynchronous Communications ..........................................30
Appendix E: Board Layout..........................................................................32
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