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  文件名称： GPIB ENET 100 使用说明
  公司名称： 深圳市汉润电子有限公司
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  Overview
Ethernet ports are a standard feature oftoday’s computers.Most of
these computers have operating systems with built-in TCP/IP network
software capability.The National Instruments GPIB-ENET/100
Ethernet-to-GPIB controller and NI-488.2 take advantage ofthis
network connectivity in instrument control applications.Using the 
NI GPIB-ENET/100,networked computers can communicate with
and control IEEE 488 devices from anywhere on an Ethernet-based
TCP/IP network.You can use a GPIB-ENET/100 to share a single GPIB
system among many networked users or to control several test systems
from a single networked host computer.
NI-488.2 for the GPIB-ENET/100 is available for a variety of
operating systems.You can port application programs written for
other National Instruments GPIB interfaces for use with the 
GPIB-ENET/100,without modifying the code.Additionally,you can
monitor data or control your instrumentation system with a Web
browser ifyou use NI-488.2 in combination with NI LabVIEW,
LabWindows/CVI,or Measurement Studio.
Description
IEEE 488 and Network Interface Details
The GPIB-ENET/100 uses TCP/IP protocols to convert a computer
with an Ethernet port into a GPIB Talker,Listener,and 
Controller.The GPIB-ENET/100 implements the full range ofGPIB 
controller functions.
Network Details
The Internet Protocol (IP) uses the Internet to route information
among network nodes.The Transmission Control Protocol (TCP),
used on top ofthe Internet Protocol,guarantees correct,in-sequence
data between network hosts and devices.
Although you commonly use TCP/IP protocols on the Internet,
most TCP/IP users are not connected to the actual Internet.
Individual institutions and corporations have created their own
internal intranets to connect their computers,other network hosts,
and devices that use TCP/IP.The regional application depicted in
Figure 1 shows an example of both Internet and intranet applications.
The Internet application example shows how a user on a workstation
in a corporate facility can access a GPIB-ENET/100 installed in a
facility at another location.Within the corporate facility,an intranet
configuration connects workstations with other GPIB devices,such as
printers and plotters.You can share GPIB systems throughout a
building,a complex,a country,or around the world.
The GPIB-ENET/100 works with both 10BaseT (10 Mb/s) and
100BaseTX (100 Mb/s) networks.It automatically detects the type of
network available and communicates at the highest speed possible.
Ethernet GPIB Controller 
•Controls IEEE 488 instruments
anywhere on an Ethernet-based
TCP/IP network 
•Up to 14 GPIB devices can be
interfaced to each GPIB-ENET/100
•Shares GPIB equipment from several
network hosts
•Compatible with twisted pair
(10BaseT or 100BaseTX)
• DHCP or manual IP address
assignment
•Maximum GPIB transfer rates
•More than 900 kbytes/s (IEEE 488.1)
•More than 1.2 Mbytes/s (HS488)
•GPIB-ENET/100 firmware code
contained in Flash EEPROM  
for easy maintenance – no physical
EEPROM changes required
•External DC power supply
• Optional rack-mount and DIN
rail/wall-mount hardware
Operating Systems
•Windows 2000/NT/XP/Me/9x
•Mac OS X,Mac OS Classic
•Linux
•Solaris
•HP-UX
•Tru64 UNIX (Digital UNIX)
Recommended Software  
•LabVIEW
•LabWindows/CVI 
•Measurement Studio
Driver Software
•NI-488.2
NI GPIB-ENET/100Ethernet GPIB Controller 
2 National Instruments • Tel: (800) 433-3488•Fax: (512) 683-9300•info@ni.com•ni.com
Performance
The National Instruments GPIB-ENET/100 is a GPIB controller that
delivers high performance by combining:
• A high-performance 32-bit CPU
• Fast Ethernet controller
• A TNT family GPIB interface ASIC
• Substantial onboard buffer RAM
• Efficient firmware design
Typical sustained data throughput is more than 900 kbytes/s.
This performance is comparable to that ofGPIB plug-in boards.Data
transfer rates can vary substantially with the NI GPIB-ENET/100
because ofthe variable network traffic and the unique operating
characteristics each subnet displays.
Cabling
You can connect the GPIB-ENET/100 directly to 10BaseT or
100BaseTX networks using CAT 5 twisted pair Ethernet cables (see
Figures 2a and 2b).Ifyou need to connect the GPIB-ENET/100 to a
different type ofnetwork,such as a coax network (10Base2),you can
add a converter to your setup.For example,you can place a coax-to-
twisted pair converter between the GPIB-ENET/100 and the coax
Ethernet tap.
You can also connect a GPIB-ENET/100 controller directly to a
computer Ethernet port,without using an Ethernet hub,using an
Ethernet crossover cable (see Figure 2c).
Network Addressing
Each GPIB-ENET/100 receives a unique Ethernet hardware address
at the factory. This address is a 48-bit value used to specify the source
and destination of Ethernet packets.The TCP/IP protocols also
require an Internet address.The Internet address is a 32-bit value
used to locate a device on the network;the Internet address has no
relationship to the Ethernet address.
You can assign the Internet address to the GPIB-ENET/100
automatically or manually.Ifthe network uses the DHCP protocol,
the GPIB-ENET/100 automatically configures its Internet address.
IfDHCP is not available,you can use the NI Ethernet Device
Configuration utility to assign the Internet address manually (see
Figure 3a).Network parameters not assigned by DHCP are stored 
in nonvolatile memory.After the Internet address has been assigned,
you can associate the address to a GPIB interface using Measurement
and Automation Explorer (MAX),as shown in Figure 3b,and use the
same programs previously written for other NI GPIB interfaces.
Firmware
The necessary command interpretation,IEEE 488.2 and TCP/IP
protocol management,and system upkeep ofthe GPIB-ENET/100
are stored in Flash EPROM as an onboard firmware operating
system.Although code is installed at the factory,you can 
easily upgrade the firmware by downloading new code to the 
GPIB-ENET/100 memory.You can download the firmware at your
site with a special utility provided with NI-488.2.Firmware upgrades
are instantaneous;you do not need to replace the physical EEPROM
inside the GPIB-ENET/100.
Internet Application
The Internet
GPIB-ENET/100
GPIB-ENET/100
Device 1
Device 2
Workstations, PCs
Workstation, PC
Device 1 Device 2
Ethernet
Ethernet
GPIB-ENET/100
Device 1
Intranet Application
Workstations, PCs
Ethernet
Ethernet
Figure 1. Regional Application ConfigurationEthernet GPIB Controller 
3 National Instruments • Tel: (800) 433-3488•Fax: (512) 683-9300•info@ni.com•ni.com
Twisted Pair Cable
GPIB-ENET/100
GPIB Cable
Twisted Pair Cable
GPIB-ENET/100
GPIB Cable
Network Hub
Crossover Cable
GPIB-ENET/100
GPIB Cable
C. Isolated Network Using Crossover Cable 
A. Standard Configuration for Intranet and Internet Applications 
Figure 2. Network Cabling Configurations
A. Detect NI Ethernet-based controllers and assign their IP addresses or host names B. Associate the IP address or host name of the GPIB-ENET/100 
to a GPIB interface in Measurement & Automation Explorer
Figure 3. Easy Steps to Configure Your GPIB-ENET/100
B. Isolated Network Using Desktop Hub and Standard Twisted Pair CablingEthernet GPIB Controller 
4 National Instruments • Tel: (800) 433-3488•Fax: (512) 683-9300•info@ni.com•ni.com
Ethernet Port
10BaseT or 100BaseTX
Ethernet address set at the factory
Internet address configuration by DHCP or by configuration utility
IEEE 488 Compatibility
Full-Function Talker, Listener, and Controller
IEEE 488.1 and IEEE 488.2 compatible
Handles all primary and secondary addresses
Address is software selectable
Performance
IEEE 488 interlocked handshake......................More than 900 kbytes/s
IEEE 488 non-interlocked (HS488) handshake....More than 1.1 Mbytes/s
Physical
Dimensions.......................................................21.0 by 12.4 by 3.7 cm (8.25 by 4.89 by 1.44 in.)
Weight............................................................400 g (14.2 oz)
I/O Connectors
GPIB ............................................................ IEEE 488 standard 24 pin
Ethernet............................................................RJ-45
Network Specifications
Connection type ............................................... IEEE 802.3 compliant
10BaseT (10 Mb/s)
100BaseTX (100 Mb/s)
Duplex mode....................................................Half duplex
Power Requirement
9 to 30 VDC ......................................................425 mA maximum
15 VDC ............................................................ 250 mA typical
Operating Environment
Ambient Temperature....................................... 0 to 65 °C
Relative humidity.............................................10 to 90%, noncondensing
Storage Environment
Ambient Temperature.......................................-40 to 100 °C
Relative humidity.............................................5 to 95%, noncondensing
Noise Emissions
FCC Class A verified
Compliance
Online at ni.com/hardref.nsf
Specifications
Hardware
GPIB-ENET/100 and NI-488.2 for Windows 2000/XP1
U.S.120 VAC.......................................................................778209-01
Swiss 220 VAC.....................................................................778209-02
Australian 240 VAC.............................................................778209-03
Universal Euro 240 VAC.....................................................778209-04
North American 240 VAC..................................................778209-05
United Kingdom 240 VAC..................................................778209-06
1 
NI-488.2 for Windows 2000/XP available in English,Japanese,Korean,simplified
Chinese,and traditional Chinese.
Software
NI-488.2
Windows NT.......................................................................778220-02
Windows Me/9x..................................................................778258-02
Linux....................................................................................778259-02
Mac OS X............................................................................778251-02
Mac OS Classic....................................................................778257-02
Solaris..................................................................................778256-02
HP-UX.................................................................................778377-02
Tru64 UNIX........................................................................778378-02
Contact NI for availability with other OSs.
Cables
GPIB
X2 cable (double shielded)
1 m...................................................................................763061-01
2 m...................................................................................763061-02
4 m...................................................................................763061-03
8 m...................................................................................763061-04
Ethernet
CAT5 twisted-pair 10/100BaseT cable (E1 cable)
1 m...................................................................................182219-01
5 m...................................................................................182219-05
10 m.................................................................................182219-10
CAT5 twisted-pair crossover cable (E4 cable)
1 m...................................................................................187375-01
5 m...................................................................................187375-05
10 m.................................................................................187375-10
CAT5 shielded twisted-pair 10/100 BaseT cable (E5 cable)
1 m...................................................................................189174-01
5 m...................................................................................189174-05
10 m.................................................................................189174-10
Additional Hardware Options
Rack-mount kit (single/dual case)..........................................187322-02
DIN-rail/wall-mount kit (single unit)....................................777972-01
BUYNOW!
For complete product specifications,pricing,and accessory 
information,call (800) 813-3693 (U.S.only) or go to ni.com/gpib.
Ordering InformationNI Services and Support
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