Atop Technology SE5404D User manual - Manual (Page 73)

User manual Version 1.3
4-Port DIN-Rail Serial Device Server SE5404D
Copyright © 2011 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
- 72 -
A.3.2.1 DB9 Pin Assignments
The pin assignments of DB9 connector on SE5404D is shown in the following table:
Pin#
RS-232
Full Duplex
RS-422/4-Wire RS-485
Full Duplex
2-Wire RS-485
Half Duplex
1 DCD N/A N/A
2 RXD TXD+ N/A (reserved)
3 TXD RXD+ DATA+
4 DTR N/A N/A
5 SG (Signal Ground) SG (Signal Ground) SG (Signal Ground)
6 DSR N/A N/A
7 RTS RXD- DATA-
8 CTS TXD- N/A (reserved)
9 RI N/A N/A