NI 186135F-31拓展器1 km，GPIB總線擴展器 - GPIB-140A可將GPIB系統(tǒng)的線纜延長一千米，而不會影響GPIB的完整性，也無需修改軟件。該配件使用緩沖傳輸技術(shù)，數(shù)據(jù)傳輸速率高達1.1 Mb/s (IEEE 488.1)或2.8 Mb/s (HS488)。GPIB-140A還可以將GPIB系統(tǒng)中GPIB設備的最大數(shù)量從15個增加到26個
正或負輸入
此模塊的輸入可以是正輸入或負輸入（所有16個輸入必須相同
類型）。當開關(guān)閉合時，這兩種類型的信號都會產(chǎn)生邏輯1（true）。選擇
通過外部電源
連接至輸入端和輸入/輸出接線板。
正極輸入從輸入設備接收電流，并向公共或負極提供電流
電源總線。輸入設備連接在正極電源母線和輸入端子之間。NI 186135F-31拓展器1 km
負輸入為輸入設備提供電流，并接受來自公共或
正極電源母線。輸入設備連接在負極電源總線和輸入之間
航空站
Positive or Negative Inputs
Inputs for this module can be either positive or negative inputs (all 16 inputs must be the same
type). Both types of signal produce a logic 1 (true) when the switch is closed. Selection of
positive or negative operation is made by the manner in which the external power supply is
connected to the inputs and to the I/O Terminal Block.
Positive inputs receive current from input devices and supply current to the common or negative
power bus. Input devices are connected between the positive power bus and the input terminals.
Negative inputs provide current to input devices and accept current from the common or
positive power bus. Input devices are connected between the negative power bus and the input
terminal.
