设备使用 NIDAQmx 驱动软件运行，该软件与软件包/应用程序开发环境（如 LabVIEW、LabWIndows/CVI 或 Measurement Studio）兼容。建议预热时间为 30 分钟，并且每年至少应进行一次外部校准。NI 设备的物理尺寸为 7.2 x 6.8 x 1.2 英寸。National Instruments SCXI-1349 屏蔽电缆适配器

SCXI -1349（部件号：182671-01）专为将 SCXI 系统连接到数据采集设备而创建。SCXI -1349 电缆适配器将 68 针 E 系列 DAQ 设备（不含 61XXE 型号）连接到 SCXI 模块（SCXI 开关模块除外）。该型号具有三个连接器。首先，在前面板上，有一个 68 针公连接器。接下来，在印刷电路板上，有一个 50 针公分线连接器。后，在适配器的背面，有一个 50 针支架安装母连接器。

美国国家仪器 SCXI-1349需要使用几件物品：一台计算机、一个 68 针 E 系列 DAQ 设备、一个 SCXI-1000、SCXI-1001 或 SCXI-1000DC 机箱、至少一个 SCXI 模块（不是 SCXI 开关模块）、一个小型一字螺丝刀、安装指南和NI SCXI-1349屏蔽电缆组件，它由电缆适配器和 68 针屏蔽电缆组成。SCXI -1349可与 1 m 或 2 m SH68-68-EP 屏蔽电缆一起使用，将 E 系列设备连接到 SCXI 机箱。其他选项是使用 0.5 m 或 1 m SHC68-68-EP 电缆或 1 m PSHR68-68 电缆将 DAQCard 连接到 SCXI 机箱。SCXI -1349 的大工作电压为 30 Vrms、42 Vpk 或 60 VDC（信号 + 共模）。

用户必须确保每个信号连接都绝缘到NI SCXI 1349可能遇到的大电压。超过National Instruments SCXI-1349 电缆适配器大信号额定值的接地电源信号和其他连接可能会导致电击或火灾危险。这也会对连接到 SCXI 机箱、计算机或 SCX 设备的电路板造成损害。

NI 设备的推荐工作温度范围为 0 至 50 °C，存储温度范围为 –20 至 70 °C，非冷凝相对湿度范围为 10 至 90%。它的设计符合电气测量和测试设备的 IEC 61010-1、UL 3111-1 和 CAN/CSA C22.2 No. 1010.1。National Instruments SCXI-1346 多机箱电缆适配器

SCXI -1346（部件号：776574-46）适用于涉及多机箱 SCXI 的应用，因为它可以将它们连接到一个 DAQ 设备。此电缆适配器有两个电缆连接。一个连接用于来自数字化仪或以前的 SCXI 机箱的信号，而二个连接用于将数字化仪的信号路由到后续机箱。SH68-68 -EP（部件号：184749-01，1 m 电缆；184749-02，2 m 电缆；184749-05，5 m 电缆；或184749-10，10 m 电缆）可单独购买并与NI SCXI 1346。这个电缆适配器有一个安装支架，可以可靠地连接到 SCXI 底盘。

SCXI 1346有四个连接器。一个连接器是前面板上的 68 针公连接器，上面印有 To Next Chassis。下一个连接器是前面板上的另一个 68 针公连接器，上面印有 From DAQ Board 或 Previous Chassis。三个连接器是印刷电路板上的 50 针公分线连接器。后一个连接器也是 50 针连接器，但它是电缆适配器背面的支架安装母头。

使用NI SCXI 1346在多机箱系统中，需要以下物品：一台计算机、一把小平头螺丝刀、68 针屏蔽电缆、一个 68 针 E 系列 DAQ 设备、一个 SCXI 1001 或 SCXI 1000 机箱（版本 K 或更高版本）、一个每个机箱的或更多 SCXI 模块（SCXI-1127、SCXI-1190 和 SCXI-1191 除外）、SCXI 1349 屏蔽电缆组件和 SCXI-1346 安装指南。用户应牢记在多机箱 SCXI 系统中使用的总电缆长度不要超过 10 m。这将有助于确保可靠的操作。

SCXI 1346使用与软件包/应用程序开发环境 (ADE) 兼容的 NI-DAQmx 驱动软件运行，例如 LabVIEW、LabWindows、LabVIEW SignalExpress、Measurement Studiio、Visual C++ 或 Visual Basic。可以使用 National Instruments Measurement & Automation Explorer (MAX) 工具配置设备硬件。

在整个PLC控制系统中，容易发生故障的地点在现场，现场容易在以下几个方面出故障。

1、一类故障点也是故障多的地点)在继电器The device runs using NIDAQmx driver software, which is compatible with the software package/application development environment (such as LabVIEW, LabWIndows/CVI or Measurement Studio). The recommended warm-up time is 30 minutes, and external calibration should be carried out at least once a year. The physical size of the NI device is 7.2 x 6.8 x 1.2 inches. National Instruments SCXI-1349 shielded cable adapter



SCXI - 1349 (Part No.: 182671-01) was created for connecting the SCXI system to the data acquisition equipment. The SCXI - 1349 cable adapter connects the 68-pin E-series DAQ device (excluding the 61XXE model) to the SCXI module (excluding the SCXI switch module). This model has three connectors. First, there is a 68-pin male connector on the front panel. Next, there is a 50-pin centimeter connector on the printed circuit board. Finally, on the back of the adapter, there is a 50-pin bracket to install the female connector.



The US National Instrument SCXI-1349 requires several items: a computer, a 68-pin E-series DAQ device, a SCXI-1000, SCXI-1001 or SCXI-1000DC chassis, at least one SCXI module (not the SCXI switch module), a small slotted screwdriver, installation guide and NI SCXI-1349 shielded cable assembly, which consists of cable adapter and 68-pin shielded cable. The SCXI - 1349 can be used with 1 m or 2 m SH68-68-EP shielded cable to connect the E series equipment to the SCXI chassis. The other option is to use 0.5 m or 1 m SHC68-68-EP cable or 1 m PSHR68-68 cable to connect the DAQCard to the SCXI chassis. The maximum operating voltage of SCXI - 1349 is 30 Vrms, 42 Vpk or 60 VDC (signal+common mode).



The user must ensure that each signal connection is insulated to the maximum voltage that NI SCXI 1349 may encounter. Grounding power signals and other connections that exceed the maximum signal rating of the National Instruments SCXI-1349 cable adapter may cause electric shock or fire hazard. This can also damage the circuit board connected to the SCXI chassis, computer or SCX device.



The recommended operating temperature range of NI equipment is 0 to 50 ° C, the storage temperature range is – 20 to 70 ° C, and the non-condensing relative humidity range is 10 to 90%. Its design conforms to IEC 61010-1, UL 3111-1 and CAN/CSA C22.2 No. 1010.1 of electrical measurement and test equipment. National Instruments SCXI-1346 Multi-Chassis Cable Adapter



SCXI - 1346 (Part No.: 776574-46) is suitable for applications involving multiple chassis SCXI, because it can connect them to a DAQ device. This cable adapter has two cable connections. One connection is used for the signal from the digitizer or the previous SCXI chassis, while the second connection is used to route the signal from the digitizer to the subsequent chassis. SH68-68 - EP (Part No.: 184749-01, 1 m cable; 184749-02, 2 m cable; 184749-05, 5 m cable; or 184749-10, 10 m cable) can be purchased separately and with NI SCXI 1346. This cable adapter has a mounting bracket that can be reliably connected to the SCXI chassis.



The SCXI 1346 has four connectors. The first connector is the 68-pin male connector on the front panel, which is printed with To Next Chassis. The next connector is another 68-pin male connector on the front panel, which is printed with From DAQ Board or Previous Chassis. The third connector is the 50-pin centimeter connector on the printed circuit board. The last connector is also a 50-pin connector, but it is the bracket mounting female on the back of the cable adapter.



Using NI SCXI 1346 in a multi-chassle system requires the following items: a computer, a small flat-head screwdriver, a 68-pin shielded cable, a 68-pin E-series DAQ device, a SCXI 1001 or SCXI 1000 chassis (version K or later), one or more SCXI modules per chassis (excluding SCXI-1127, SCXI-1190 and SCXI-1191), SCXI 1349 shielded cable assembly, and SCXI-1346 installation guide. Users should keep in mind that the total cable length used in the multi-case SCXI system should not exceed 10 m. This will help ensure reliable operation.



SCXI 1346 runs with NI-DAQmx driver software compatible with the package/application development environment (ADE), such as LabVIEW, LabWindows, LabVIEW SignalExpress, Measurement Studio, Visual C++, or Visual Basic. You can use the National Instruments Measurement&Automation Explorer (MAX) tool to configure the device hardware.



In the whole PLC control system, the site is the most prone to failure, and the site is the most prone to failure in the following aspects.



1. The first type of fault point is also the most fault point) in the relay