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SmartController EX User's Guide
11069-000 Rev. H
4.4 Configuring the SmartController
RS-232 Connectors
All three types of RS-232 connectors are 9-pin DB9 male (standard PC) connectors. The user-
supplied cable to connect to the RS-232 connectors should be a DB9, F/F, null-modem data-
transfer cable. The pin assignments are the same for all three connectors and are shown in the
following table.
Table 4-3. RS-232 Connector Pin Assignments
Pin
RS-232-1 & -2
RS-232 / Term
Signal
Type
Signal
Type
1
Reserved
-
N/C
-
2
RXD
Input
RXD
Input
3
TXD
Output
TXD
Output
4
Reserved
-
N/C
-
5
GND
Ground GND
Ground
6
Reserved
-
N/C
-
7
RTS
Output
RTS
Output
8
CTS
Input
CTS
Input
9
Reserved
-
N/C
-
These ports support the RTS and CTS signals used for hardware handshaking (also known as
modem control). By default, these signals are not enabled. To configure hardware handshaking
and other communication parameters, use the eV+ FSET program instruction. The eV+ des-
ignations for these ports, when referenced in the eV+ ATTACH or FSET instructions, are
shown in the following table.
NOTE:
To configure the port speed and other communications parameters, use
the eV+ FSET program instruction.
Table 4-4. Serial Connectors and eV+ Designations
Connector
eV+ Designation
RS-232 / Term
SERIAL:0
RS-232-1
SERIAL:1
RS-232-2
SERIAL:2
RS-422 / 485
SERIAL:3
RS-422 / 485 Connector
The RS-422 / 485 connector is a 9-pin DB9 male connector. The pin assignments are shown in
the following table. RS-422 is a point-to-point protocol for connecting to a single destination.