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Serial Interfaces for RS232, RS485, and RS422

National Instruments offers high-quality, reliable serial interfaces for communications with laboratory instruments, industrial devices, and embedded circuits using RS232, RS485, and RS422. NI serial interfaces work on all major PC platforms with a variety of port and isolation options.

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8- and 16-port RS232 and RS485 serial interfaces for PCI Express systems

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Adding RS232 and RS485 serial ports to CompactRIO embedded control systems

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Low-cost, highly flexible 1-, 2-, and 4-port serial interfaces for USB

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Product Results (48 Devices/Modules)
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1
/Navigation/Faceted/InstrumentControlxx,/Navigation/Faceted/WirelessSensorNetworksxx
NI WSN-3230
Programmable 1-Port RS232 Serial Node
$ 499
Digital I/O: 2 DIO
Ports: 1
Transfer Rate: 230400 bits/s
Devices/Port: 1
2
/Navigation/Faceted/InstrumentControlxx
NI PXI-8430/8 (RS232)
High-Performance, 8-Port Serial Interface for PXI
$ 823
Ports: 8 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
3
/Navigation/Faceted/InstrumentControlxx,/Navigation/Faceted/WirelessSensorNetworksxx
NI WSN-3231
Programmable 1-Port RS485 Serial Node
$ 499
Digital I/O: 2 DIO
Ports: 1 · RS-485
Transfer Rate: 230400 bits/s
Devices/Port: 32
4
/Navigation/Faceted/InstrumentControlxx
NI PXI-8431/8 (RS485/RS422)
High-Performance, 8-Port Serial Interface for PXI
$ 874
Ports: 8 · RS-422
Devices/Port: 31
5
/Navigation/Faceted/InstrumentControlxx
NI PXI-8432/4 (RS232)
High-Performance, Isolated 4-Port Serial Interface for PXI
$ 720
Ports: 4 · RS-232
Transfer Rate: 1000 kbits/s
Devices/Port: 1
6
/Navigation/Faceted/InstrumentControlxx
NI PXI-8433/4 (RS485/422)
High-Performance, Isolated 4-Port Serial Interface for PXI
$ 771
Ports: 4 · RS-422 · RS-485
Transfer Rate: 3 Mbits/s
Devices/Port: 31
7
/Navigation/Faceted/InstrumentControlxx
NI PCI-8430/8 (RS232)
High-Performance 8-Port Serial Interface for PCI
$ 720
Ports: 8 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
8
/Navigation/Faceted/InstrumentControlxx
NI ENET-232/2
2-Port Ethernet Interface for RS232
$ 749
Ports: 2 · RS-232
Transfer Rate: 230.4 kbits/s
Devices/Port: 1
9
/Navigation/Faceted/InstrumentControlxx
NI ENET-232/4
4-Port Ethernet Interface for RS232
$ 949
Ports: 4 · RS-232
Transfer Rate: 230.4 kbits/s
Devices/Port: 1
10
/Navigation/Faceted/InstrumentControlxx
NI ENET-485/2
2-Port Ethernet Interface for RS485/RS422
$ 799
Ports: 2 · RS-422 · RS-485
Transfer Rate: 460.8 kbits/s
Devices/Port: 31
11
/Navigation/Faceted/InstrumentControlxx
NI ENET-485/4
4-Port Ethernet Interface for RS485/RS422
$ 999
Ports: 4 · RS-422 · RS-485
Transfer Rate: 460.8 kbits/s
Devices/Port: 31
12
/Navigation/Faceted/InstrumentControlxx
NI USB-485
1-Port RS485/422 Interface for USB
$ 149
Ports: 1 · RS-422 · RS-485
Transfer Rate: 460.8 kbits/s
Devices/Port: 31
13
/Navigation/Faceted/InstrumentControlxx
NI PCI-8430/16 (RS232)
High-Performance 16-Port RS232 Serial Interface for PCI
$ 1,235
Ports: 16 · RS-232
Devices/Port: 1
14
/Navigation/Faceted/InstrumentControlxx
NI PXI-8430/16 (RS232)
High-Performance, 16-Port Serial RS232 Interface for PXI
$ 1,235
Ports: 16 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
15
/Navigation/Faceted/InstrumentControlxx
NI USB-232
1-Port RS232 Interface for USB
$ 149
Ports: 1 · RS-232
Transfer Rate: 230.4 kbits/s
Devices/Port: 1
16
/Navigation/Faceted/InstrumentControlxx
NI USB-232/4
4-Port RS232 Interface for USB
$ 499
Ports: 4 · RS-232
Transfer Rate: 230.4 kbits/s
Devices/Port: 1
17
/Navigation/Faceted/InstrumentControlxx
NI USB-232/2
2-Port RS232 Serial Interface for USB
$ 349
Ports: 2 · RS-232
Transfer Rate: 230.4 kbits/s
Devices/Port: 1
18
/Navigation/Faceted/InstrumentControlxx
NI PCI-8430/4 (RS232)
High-Performance 4-Port Serial Interface for PCI
$ 462
Ports: 4 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
19
/Navigation/Faceted/InstrumentControlxx
NI PCI-8430/2 (RS232)
High-Performance 2-Port Serial Interface for PCI
$ 308
Ports: 2 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
20
/Navigation/Faceted/InstrumentControlxx
NI PCI-8432/2 (Industrial RS232)
High-Performance, Isolated 2-Port Serial Interface for PCI
$ 411
Ports: 2 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
21
/Navigation/Faceted/InstrumentControlxx
NI PCI-8431/4 (RS485 and RS422)
High-Performance 4-Port Serial Interface for PCI
$ 514
Ports: 4 · RS-422 · RS-485
Transfer Rate: 3 Mbits/s
Devices/Port: 31
22
/Navigation/Faceted/InstrumentControlxx
NI PCI-8431/2 (RS485 and RS422)
High-Performance 2-Port Serial Interface for PCI
$ 359
Ports: 2 · RS-422 · RS-485
Transfer Rate: 3 Mbits/s
Devices/Port: 31
23
/Navigation/Faceted/InstrumentControlxx
NI USB-485/2
2-Port RS485/422 Serial Interface for USB
$ 399
Ports: 2 · RS-422 · RS-485
Transfer Rate: 460.8 kbits/s
Devices/Port: 31
24
/Navigation/Faceted/InstrumentControlxx
NI USB-485/4
4-Port RS485/422 Serial Interface for USB
$ 499 - $ 549
Ports: 4 · RS-422 · RS-485
Transfer Rate: 460.8 kbits/s
Devices/Port: 31
25
/Navigation/Faceted/InstrumentControlxx
NI PXI-8430/2 (RS232)
High-Performance, 2-Port RS232 Serial Interface for PXI
$ 411
Ports: 2 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
26
/Navigation/Faceted/InstrumentControlxx
NI PXI-8430/4 (RS232)
High-Performance, 4-Port Serial Interface for PXI
$ 565
Ports: 4 · RS-232
Transfer Rate: 1 Mbits/s
Devices/Port: 1
27
/Navigation/Faceted/InstrumentControlxx
NI PXI-8431/4 (RS485/422)
High-Performance, 4-Port Serial Interface for PXI
$ 617
Ports: 4 · RS-422 · RS-485
Transfer Rate: 3 Mbits/s
Devices/Port: 31
28
/Navigation/Faceted/InstrumentControlxx
Ports: 2 · RS-232
Transfer Rate: 921.6 kbits/s
Devices/Port: 1
29
/Navigation/Faceted/InstrumentControlxx
Ports: 1 · RS-232
Transfer Rate: 921.6 kbits/s
Devices/Port: 1
30
/Navigation/Faceted/InstrumentControlxx
Ports: 4 · RS-232
Transfer Rate: 115.2 kbits/s
Devices/Port: 1
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