Serial Interfaces
for RS-485 and RS-232
RS-485 and RS-232 Interfaces
Pin 34
Pin 1
Pin 50
Pin 1
Pin 68
Pin 35
Pin 100
Pin 51
Figure 3. SCSI 68-Pin Connector Locations
4-port device to the same DB-9 male connector found on a typical PC
serial port. The connection from this converter to your serial device uses
the standard serial cables used with the PC serial port.
As an exception to the previous description, National Instruments ships
isolated ISA and PCI 4-channel serial boards with cables to ensure isolation.
The 4-channel PXI serial modules do not require special isolated cables to
ensure isolation; therefore, cables are not shipped with these modules.
The 8-port serial interfaces include an adapter cable that connects to the
SCSI 68-pin connector on the device and terminates in eight standard
DB-9 male connectors (see Figure 3).
Figure 4. SCSI 100-Pin Connector Locations
The 16-port RS-232 serial interface includes a breakout box that
connects to the SCSI 100-pin connector on the device and terminates
in 16 standard DB-9 male connectors (see Figure 4).
PCMCIA serial cards ship with interface cables that provide one,
two, or four DB-9 male connectors. These DB-9 male connectors
provide standard pin assignments for RS-485 and RS-232 connections.
Note that these cables are not designed to go the full distance from a
PCMCIA serial card to your instrument. The cables provide the same
DB-9 male connectors found on a typical PC serial port.
Ordering Information
Model
PCI
PCI-485/2
PCI-485/4
PCI-485/8
PCI-485I/2
PCI-485I/4
PCI-232/2
PCI-232/4
PCI-232/8
PCI-232/16
PCI-232I/2
PCI-232I/4
PXI
PXI-8420/2
PXI-8420/4
PXI-8420/8
PXI-8420/16
PXI-8421/2
PXI-8421/4
PXI-8421/8
PXI-8422/2
PXI-8422/4
PXI-8423/2
PXI-8423/4
PCMCIA
PCMCIA-485
PCMCIA-485/2
PCMCIA-232
PCMCIA-232/2
PCMCIA-232/4
ISA
AT-485/2
AT-485/4
AT-485I/2
AT-485I/4
AT-232/2
AT-232/4
AT-232I/2
AT-232I/4
Serial
Port
RS-485/422
RS-485/422
RS-485/422
RS-485/422
RS-485/422
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
RS-232
RS-485/422
RS-485/422
RS-485/422
RS-232
RS-232
RS-485/422
RS-485/422
RS-485/422
RS-485/422
RS-232
RS-232
RS-232
RS-485/422
RS-485/422
RS-485/422
RS-485/422
RS-232
RS-232
RS-232
RS-232
Bus
Number
of Ports
2
4
8
2
4
2
4
8
16
2
4
2
4
8
16
2
4
8
2
4
2
4
1
2
1
2
4
2
4
2
4
2
4
2
4
FIFO
Size B
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
16
16
16
16
64
16
16
16
16
16
16
16
16
Max Transfer
Rate kb/s
460
460
460
460
460
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
460
460
460
115.2
115.2
460
460
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
115.2
Isolation
Cables
Included
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Part Number
Serial Interfaces
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PXI
PXI
PXI
PXI
PXI
PXI
PXI
PXI
PXI
PXI
PXI
PCMCIA
PCMCIA
PCMCIA
PCMCIA
PCMCIA
ISA
ISA
ISA
ISA
ISA
ISA
ISA
ISA
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
777641-02
777641-04
777641-08
777853-02
777853-04
777642-02
777642-04
777642-08
777642-16
777854-02
777854-04
777733-02
777733-04
777733-08
777733-16
777735-02
777735-04
777735-08
777736-02
777736-04
777737-02
777737-04
777378-01
777378-02
777379-01
777379-02
777379-04
777311-02
777311-04
777501-02
777501-04
777312-02
777312-04
777500-02
777500-04
822
National Instruments
Tel: (512) 794-0100 • Fax: (512) 683-9300 • info@ni.com • ni.com
NI [ NATIONAL INSTRUMENTS CORPORATION ]
