Serial Port; Rs232 Serial Port - Weidmuller WI-GTWY-9 User Manual

WI-GTWY-9-xxx Wireless Gateway

3.5 Serial Port

3.5.1 RS232 Serial Port

The serial port is a 9 pin DB9 female and provides for connection to a terminal or to a PC for
configuration, field testing and for factory testing. It is also used by the Modbus/DF1 version for
fieldbus connection.
This port is internally shared with the RS485 - ensure that the RS485 is disconnected before
attempting to use the RS232 port. Communication is via standard RS232 signals. The WI-
GTWY-9-xxx is configured as DCE equipment with the pinout detailed below.
DB9 Connector Pinout:
Pin Name
1 DCD
2 RD
3 TD
4 DTR
5 SG
6 DSR
7 RTS
8 CTS
9 RI
Hardware handshaking using the CTS/RTS lines is provided, and are under the control of the
Host Comms Driver. Example cable drawings for connection to a DTE host (a PC) or another DCE
host are detailed below:
3.5.2
MODEM
36
Direction Function
Used for "active" signal.
Out
Out Serial Data Output
In Serial Data Input
Data Terminal Ready - may be used by Host Protocol Driver
In
Signal Ground
Out Data Set Ready - always high when unit is powered on.
In Request to Send - may be used by Host Protocol Driver
Out Clear to send - may be used by Host Protocol Driver
Ring indicate - not connected
2 2
RD
3 3
TD
5 5
SG
7 7
RTS
8 8
CTS
6 6
DSR
4 4
DTR
1 1
DCD
DCE HOST
DB9
MALE FEMALE
2
RD
RD
3
TD
TD
5
SG
SG
7
RTS
RTS
8
CTS
CTS
6
DSR
DSR
4
DTR
DTR
1
DCD
DCD
MODEM
DB9 DB9
MALE
V1.18
2
RD
3
TD
5
SG
7
RTS
8
CTS
6
DSR
4
DTR
1
DCD
DCE HOST
DB9
MALE