Perle Systems DS1 - Manual (Page 27)

Installation 27
EIA-232 Cabling Diagrams
EIA-232 Cabling Diagrams
This section shows how to create EIA-232 cables that are compatible with the Device Server.
Terminal DB25 Connector
The following diagram shows how the null modem cable should be configured when connecting to a
terminal DB25.
2 (TxD) 3 (RxD)
3 (RxD) 2 (TxD)
4 (RTS) 5 (CTS)
5 (CTS) 4 (RTS)
6 (DSR) 20 (DTR)
7 (GND) 7 (GND)
20 (DTR) 6 (DSR)
Modem DB25 Connector
The following diagram shows how a standard straight through cable should be configured when
connecting to a DB25 modem.
2 (TxD) 2 (RxD)
3 (RxD) 3 (TxD)
4 (RTS) 4 (CTS)
5 (CTS) 5 (RTS)
6 (DSR) 6 (DSR)
7 (GND) 7 (GND)
8 (DCD) 8 (DCD)
20 (DTR) 20 (DTR)
IOLAN DS1
DB25 (DTE)
Terminal DB25
(DTE)
IOLAN DS1
DB25 (DTE)
Modem DB25
(DCE)