
2.5.4 RS-232 PORT CONNECTIONS
If your RFL 9660 is equipped with one or more RS-232 I/O modules (Part Number 104420), there will be a
series of 9-pin D-subminiature (DB-9) male DCE connectors on the rear of the RFL 9660. Each of these
connectors provides all connections for one RS-232 port. Port assignments are shown in Table 12-1 in
Section 12. Space is also provided in the table for you to write in the name or description of the device
connected to each port, along with its communications characteristics. You will need this information when you
use the procedures in Section 3 to set the switch and port configuration.
Terminal assignments for the device port connectors are shown in Figure 2-6. You do not have to make
connections to all pins. Wiring will depend on the specific device being connected to the port. Refer to
Section 16 for application notes for the specific device you are wiring, or refer to the manual supplied with the
device.
NOTE: Shielded cable should be used. Length should not exceed 250 feet (75 meters).
6
1
2
3
4
5
7
8
9
DATA CARRIER DETECT (DCD)
TRANSMIT DATA (TD)
RECEIVE DATA (RD)
DATA TERMINAL READY (DTR)
SIGNAL COMMON
DATA SET READY (DSR)
REQUEST-TO-SEND (RTS)
CLEAR-TO-SEND (CTS)
NOT USED
DB-9 CONNECTOR (MALE)
Figure 2-6. Terminal assignments for PORT connectors on RFL 9660 Digital Switch
RFL 9660
RFL Electronics Inc.
April 24, 2007 2-8
(973) 334-3100