Figure 3 - Rj-45 Pinouts (Db-9 To Rj-45 Adapter); Table 5 - Rs-232 Signals On Rj-45 Connector (Db-9 To Rj-45 Adapter); Table 6 - Rs-422/485 Signals On Rj-45 Connector (Db-9 To Rj-45 Adapter) - Quatech Device Server User Manual

Quatech SDS User's Manual
Figure 4 and Tables 5 and 6
show the RS-232/422/485
-RJ-45 pinouts and
descriptions.
Note: If your serial port cable
uses an 8-pin RJ-45 plug, you
can use the center eight pins of
the SDS' RJ-45 connector for
RS-232 communications. You
will lose access to the Ring
Indicator signal.
Note: Pins labeled NC are
indeterminate in two-wire mode
and should be left unconnected.
October 2006

Figure 3 - RJ-45 pinouts (DB-9 to RJ-45 adapter)

signal

Table 5 - RS-232 signals on RJ-45 connector (DB-9 to RJ-45 adapter)

RS-232 signal description
Ring Indicator (RI)
Request To Send (RTS)
Data Terminal Ready (DTR)
Signal Ground (GND)
Transmit Data (TxD)
Receive Data (RxD)
Data Carrier Detect (DCD)
Data Set Ready (DSR)
Clear To Send (CTS)
No Connection

Table 6 - RS-422/485 signals on RJ-45 connector (DB-9 to RJ-45 adapter)

RS-422/485 signal description
four-wire mode
Transmit Data (TxD–)
Auxiliary Output (AuxOut+)
Auxiliary Output (AuxOut–)
Signal Ground (GND)
Transmit Data (TxD+)
Receive Data (RxD+)
Auxiliary Input (AuxIn–)
Receive Data (RxD–)
Auxiliary Input (AuxIn+)
No Connection
940-0183-154
RJ-45
1
2
3
4
5
6
7
8
9
10
RJ-45 RS-422/485 signal description
two-wire mode
1 Transmit/Receive Data (Data–)
2 NC
3 NC
4 Signal Ground (GND)
5 Transmit/Receive Data (Data+)
6 NC
7 NC
8 NC
9 NC
10 No Connection
Introduction
Page 11