這鎳SCXI-1140(零件號:776572-40)是一個(gè)同步采樣差分放大器模塊。該模塊具有8個(gè)通道和外部定時(shí)信號連接。該模塊與NI-DAQmx測量服務(wù)軟件兼容。因此，配置保持簡單明了。該模塊可與的數(shù)據(jù)采集板一起使用NB系列用LabVIEW for Macintosh。該設(shè)備也可以與麥金塔電腦的DAQ軟件一起使用。

該器件的通道輸出壓擺率為15 V/μsec，輸入噪聲頻譜密度為12 nV/√Hz，輸出噪聲頻譜密度為75 nV/√Hz。這鎳SCXI-1140最大輸出電壓可達(dá)10 V。這鎳SCXI-1140配有三個(gè)專用跳線:W11、W13和W14，用于SCXIbus和數(shù)據(jù)采集板之間的通信。這SCXI-1140差分放大器模塊配有DIP開關(guān)可編程儀表放大器、緩沖采樣保持放大器、多路復(fù)用器和輸出開關(guān)。

的輸入保護(hù)國家儀器公司SCXI-1140具有1kω串聯(lián)電阻。該模塊的每個(gè)輸入端子都受到保護(hù)。這SCXI-1140附帶四種基本類型的掃描模式，如單模塊并行和多路復(fù)用掃描。該模塊有兩個(gè)寄存器。ID寄存器是一個(gè)4字節(jié)的只讀寄存器。另一方面，配置寄存器是一個(gè)32位只寫寄存器。還有一個(gè)用戶無法訪問的配置寄存器。它是一個(gè)32位寄存器，旨在處理的控制和功能相關(guān)任務(wù)SCXI-1140。

The NI SCXI-1140 (Part Number: 776572-40) is a Simultaneous Sampling Differential Amplifier Module. This module comes featured with 8 channels and connections for the external timing signal. This module is compatible with the NI-DAQmx measurement services software. Therefore, the configuration remains simple and straightforward. This module can be used with the data acquisition boards from the NB Series with LabVIEW for Macintosh. This device can also be used with NI-DAQ software for Macintosh.

This device has 15 V/μsec channel output slew rate and 12 nV/√Hz input noise spectral density, as well as 75 nV/√Hz output noise spectral density. The NI SCXI-1140 can operate with ±10 V maximum output voltage. The NI SCXI-1140 comes with three dedicated jumpers: W11, W13, and W14 for communication between the SCXIbus and the data acquisition board. The SCXI-1140 Differential Amplifier Module comes equipped with DIP switch-programmable instrumentation amplifiers, buffered track-and-hold amplifiers, multiplexers, and output switches.

The input protection of the National Instruments SCXI-1140 features a 1 k? resistor in series. Each of this module’s input terminals is protected. The SCXI-1140 comes with four basic types of scanning modes, such as single module parallel and multiplexed scanning. This module has two registers. The ID register is a four-byte register for read-only functionality. On the other hand, the configuration register is a 32-bit write only register. There is a configuration register as well which cannot be accessed by the user. It is a 32-bit register designed to handle control and functions related tasks of the SCXI-1140.