NI SCXI-1302模擬硬件模塊,SCXI-1302產品尺寸
安裝接線盒PFXC 141
PFXC 141通常用于連接Pressductor?稱重傳感器，其中距離稱重傳感器和張力電子裝置之間的距離很長。固定在稱重傳感器上的電纜和連接至控制單元的電纜應連接至接線盒。
接線盒PFXC 141應安裝在稱重傳感器附近，并位于易于維修的受保護位置。
接線盒的尺寸如圖2-11所示。未使用的孔必須堵住。
NI SCXI-1302模擬硬件模塊電路圖見附錄A.5.3接線盒PFXC 141。絕緣放大器PXUB 201（僅適用于IP 20版本）
當輸入和輸出之間存在電流絕緣時，使用絕緣放大器PXUB 201，或電源和輸入/輸出之間需要。參見第A.5.1節絕緣放大器PXUB 201。
絕緣放大器PXUB 201擬安裝在DIN導軌上。PXUB 201是通過螺釘端子連接。
PXUB 201通常由提供張力的相同+24 V DC電源供電如果PXUB 201安裝在端子組附近，則不需要在要屏蔽的張力電子設備和PXUB 201。電源裝置SD83x如果沒有24 V可用電壓，電源裝置SD 831、SD 832和SD 833可以用作IP 20版本的電源。電源裝置擬安裝在DIN導軌上。
所有三個電源裝置的主電源電壓為：
?115 V AC（90-132 V），100 V-10%至120 V+10%
?230 V AC（180-264 V），200 V-10%至240 V+10%
PFXC 141 are normally used for connection of Pressductor? load cells where the distance
between load cells and tension electronics is long. The cables fixed to the load cells and the
cable to the control unit are to be connected to the junction box.
The junction box PFXC 141 shall be mounted adjacent to the load cells and located in a
protected position easily accessible for service.
The dimensions of the junction box are shown in Figure 2-11.
Holes not used must be plugged.
For circuit diagram see Appendix A.5.3 Junction Box PFXC 141. Insulation Amplifier PXUB 201 (only for the IP 20-version)
Insulation amplifier PXUB 201 is used when galvanic insulation between input and output, or
between power supply and input/output, is required. See Section A.5.1 Insulation Amplifier
PXUB 201.
Insulation amplifier PXUB 201 is intended to be installed on a DIN-rail. The PXUB 201 is
connected by screw terminals.
PXUB 201 is normally supplied from the same +24 V DC supply that supplies the tension
electronics.
If PXUB 201 is mounted close to the terminal group, it is not necessary for the cable between
the tension electronics and PXUB 201 to be screened. Power Supply Unit SD83x
If no 24 V is available, the power supply units SD 831, SD 832 and SD 833 can be used as
power supply for the IP 20-versions.
The power supply unit is intended to be installed on a DIN-rail.
The main supply voltage for all the three power supply units are:
? 115 V AC (90 - 132 V), 100 V -10% to 120 V + 10%
? 230 V AC (180 - 264 V), 200 V -10% to 240 V + 10%
