這鎳SCXI-2400模塊能夠通過(guò)用戶計(jì)算機(jī)上的RS-232端口或RS-485端口控制任何SCXI機(jī)箱。RS-232端口用于直接連接到計(jì)算機(jī)的串行端口，而RS-485端口用于遠(yuǎn)距離多機(jī)箱系統(tǒng)配置。來(lái)操作SCXI 2400模塊，用戶需要一個(gè)SCXI機(jī)箱(SCXI-1000,SCXI-1000DC，或者SCXI-1001)、RS-232 5型零調(diào)制解調(diào)器電纜或RS-485 4線電纜和鐵氧體、具有RS-232或RS-485端口的計(jì)算機(jī)和軟件(用于Windows的LabVIEW、用于Windows的LabWindows/CVI或用于PC兼容機(jī)的NI-DAQ)?？膳c一起使用的可選附件鎳SCXI-2400是SCXI-1200 DAQ模塊。

該模塊的波特率是可配置的。用戶必須選擇的波特率SCXI-2400串行接口模塊。如果用戶有幾個(gè)機(jī)箱連接到一個(gè)RS-485網(wǎng)絡(luò)，那么他們必須為同一網(wǎng)絡(luò)上的每個(gè)機(jī)箱配置相同的波特率。用戶可以使用模塊前面板上的開(kāi)關(guān)9至12來(lái)指定波特率。用戶也可以配置HDLC地址。但是，如果用戶不使用大量機(jī)箱，HDLC地址可以保持為出廠默認(rèn)地址1。RS-232端口不能用于從一個(gè)串行端口控制一個(gè)以上的機(jī)箱；只有RS-485串行端口可以從單個(gè)串行端口控制多個(gè)機(jī)箱。

The NI SCXI-2400 module has the capability to control any SCXI chassis via the RS-232 port or the RS-485 port on the user’s computer. The RS-232 port is used for direct connection to the serial port of a computer, while the RS-485 port is used for long distance, multichassis system configuration. To operate the SCXI 2400 module, the user needs an SCXI Chassis (SCXI-1000, SCXI-1000DC, or SCXI-1001), either an RS-232 Type 5 null modem cable or an RS-485 4-wire cable and ferrite, a computer with an RS-232 or RS-485 port, and software (LabVIEW for Windows, LabWindows/CVI for Windows, or NI-DAQ for PC compatibles). An optional accessory that can be used with the NI SCXI-2400 is the SCXI-1200 DAQ module.

The baud rate on this module is configurable. The user must choose the baud rate for the SCXI-2400 Serial Interface Module. If the user has several chassis cabled to one RS-485 network, then they must configure every chassis on the same network for an identical baud rate. The user can specify the baud rate by using switches 9 through 12 on the front panel of the module. The HDLC address can also be configured by the user. However, the HDLC address can remain at the factory-default of 1 if the user is not using numerous chassis. The RS-232 port cannot be utilized to control more than one chassis from one serial port; only the RS-485 serial port can control more than one chassis from a single serial port.