Serial Interfaces for PXI, PCI,
PCMCIA, Ethernet, USB, and ISA
High-Performance Interfaces
with serial devices. They come with either 2 or 4-port options and
NI 843x high-performance serial interfaces deliver advanced features use standard RS232, RS422, or RS485 communications. All products
such as flexible baud rates up to 2 Mb/s and universal PCI, and are shipped with driver software for Windows 2000/NT/XP. You can
hyperthreading and multiprocessor compatibility. With the flexible install and use these serial device servers as standard serial ports from
baud rate capabilities of the NI 843x interfaces, you can your existing applications or with applications written with NI-VISA.
communicate with devices that operate with nonstandard baud rates
The TCP/IP communication protocol, which handles all
ranging from 57 b/s up to 2 Mb/s within 1 percent and standard baud communication between the serial device server and the host PC,
rates within 0.01 percent. With multiprocessor and hyperthreading runs on embedded firmware in the serial device server. A
compatibility, you also can take advantage of the latest PC configuration utility configures the IP address of the serial device
technology for higher speeds and improved efficiency. The new server and exposes all additional serial ports to the OS for immediate
driver software included with the devices offers better resource use by any application software package using a standard Microsoft
allocation as well as DMA access for higher throughput with minimal Windows Serial (COM) port interface.
CPU usage. In addition, NI 843x interfaces include new
memory-mapping features that you can use to connect to more serial Specifications
devices without resource conflicts. PCI-843x interfaces are universal
Interface Hardware Dimensions
PCI boards, fully compatible with both 5 and 3.3 V signaling
environments so the board can work in a wide range of PCs.
High-Performance PCI ..................................... 10.7 by 14.2 cm (4.2 by 5.6 in)
PCI
2-port boards (isolated and unisolated)..... 10.7 by 14.2 cm (4.2 by 5.6 in.)
4-port boards (isolated and unisolated)..... 10.7 by 17.3 cm (4.2 by 6.8 in.)
8-port boards ............................................ 10.7 by 14.5 cm (4.2 by 5.7 in.)
16-port boards .......................................... 10.7 by 17.5 cm (4.2 by 6.9 in.)
PXI (excluding connectors).............................. 10.0 by 16.0 cm (3.9 by 6.3 in.)
PCMCIA........................................................... Type II PC Card
ENET................................................................ 21.0 by 12.4 by 3.7 cm
(8.25 by 4.89 by 1.44 in.)
Pin 1
Pin 10
Pin 5
Pin 1
Pin 9
Pin 6
USB-232/2, USB-232/4 ................................... 21.0 by 12.4 by 3.7 cm
(8.3 by 4.9 by 1.4 in.)
Figure 1. DB-9 Connector Pin Locations
Figure 2. 10-Position Modular Jack
Pin Locations
USB-232 .......................................................... 3.8 by 3.7 by 1.6 cm or
(1.5 by 1.4 by 0.6 in.)
ISA
Unisolated 2-port boards.......................... 10.7 by 16.5 cm (4.2 by 6.5 in.)
Isolated 2-port boards .............................. 10.7 by 18.7 cm (4.2 by 7.4 in.)
Unisolated 4-port boards.......................... 10.7 by 16.5 cm (4.2 by 6.5 in.)
Isolated 4-port boards .............................. 10.7 by 25.4 cm (4.2 by 10.0 in.)
Pin 34
Pin 1
Pin 50
Pin 1
Pin 68
Pin 35
Pin 51
Pin 100
Environmental Specifications
Operating Environment
Ambient
Storage Environment
Ambient
Figure 3. SCSI 68-Pin Connector Locations Figure 4. SCSI 100-Pin Connector Locations
Temperature
(°C)
Relative
Humidity
10 to 90%
10 to 90%
10 to 90%
10 to 90%
10 to 90%
10 to 90%
Temperature
(°C)
Relative
Humidity
5 to 95%
5 to 95%
5 to 95%
5 to 95%
5 to 95%
5 to 95%
PCI
PXI
PCMCIA
ISA
USB
0 to 55
0 to 55
0 to 55
0 to 70
0 to 70
0 to 70
-20 to 70
-20 to 70
-40 to 125
-20 to 70
-40 to 80
-40 to 85
USB Interfaces
The National Instruments USB-232 and USB-485 transform your
USB port into asynchronous serial ports for communication with
serial devices. The NI USB-232 and USB-485 are available in either 1,
2, or 4-port versions, using standard RS232, RS422, or RS485
communications. You can install and use the USB-232 and USB-485
as standard serial ports from your existing applications or with
applications written with NI-VISA.
Ethernet
Safety
These products are designed to meet the requirements of the following standards of safety for
information technology equipment:
IEC 60950-1, EN 60950-1
UL 60950-1
CAN/CSA C22.2 No. 60950-1
Additionally, the USB-232 2 and 4-port versions feature software-
selectable DTE or DCE transceiver modes, as well as an automatic
transceiver detection mode, or Auto232. The USB-485 features
software-selectable biasing, with which you can turn biasing on and
off for each port.
Electromagnetic Compatibility
Emissions: EN 55011 Class A at 10 m. FCC Part 15A above 1 GHz
Immunity: EN 61326:1997 + A2:2001, Table 1
CE, C-Tick, and FCC Part 15 (Class A) Compliant
NOTE: For EMC compliance, operate this device with shielded cabling.
CE Compliance
These products meet the essential requirements of applicable European Directives, as amended for CE
Marking, as follows:
Low-Voltage Directive (safety):........................ 73/23/EEC
Electromagnetic Compatibility
Directive (EMC):......................................... 89/336/EEC
NOTE: For more information on certifications, marks, and DoCs, visit ni.com/certification.
Ethernet Interfaces
The National Instruments ENET-232 and ENET-485 serial device
servers connect either 100BaseTX (100 Mb/s) or 10BaseT (10 Mb/s)
Ethernet networks to asynchronous serial ports for communication
2
National Instruments • Tel: (800) 813-3693 • info@ni.com • ni.com
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