Schneider AEG 离散输出模块8x24VDC/230VAC AS-BDAP-208

产品标题：Schneider AEG 离散输出模块8x24VDC/230VAC AS-BDAP-208

型号： 离散输出模块8x24VDC/230VAC AS-BDAP-208

品牌：Schneider AEG  

质保：七天验收期，质保期一年

产品图片展示

​产品详情资料

此处为CD≥10立方厘米。
CD影响差异信号。CC影响共模
信号R×CC中的任何不匹配都会降低AD620 CMRR。到
避免无意中降低CMRR带宽性能，
确保CC至少比CD小一个量级。
失配CCs的影响随着更大的
图42衰减射频干扰的电路
通用模式拒绝
仪表放大器，如AD620，提供高
CMR，它是当
两个输入值的变化量相等。这些规格
通常针对全范围输入电压变化和
指定的源不平衡。
为了获得佳CMR，参考终端应连接至
低阻抗点，电容和
阻力应保持在两者之间的小值
输入。在许多应用中，屏蔽电缆用于
尽量减少噪音；为了获得佳CMR过频，屏蔽
应正确驱动。图43和图44显示活动
配置为改进交流共模的数据保护
输入电缆电容“自举”拒收
-0-047
图44共模屏蔽驱动器
接地
由于AD620输出电压是根据
参考端子上的电位，它可以解决许多
通过简单地将REF引脚连接到
适当的“当地理由”
将低电平模拟信号与有噪声的数字信号隔离
环境中，许多数据采集组件都有单独的
模拟和数字接地引脚（图45）。会的
方便使用单根地线；然而，当前
通过地线和PC线路的电路卡可能会导致
数百毫伏的误差。因此，分开地面
应提供回流，以小化来自
敏感点到系统接地。这些地面返回
必须在某个点上结合在一起，通常好是在ADC
程序包如图45所示。here CD ≥10CC.
CD affects the difference signal. CC affects the common-mode
signal. Any mismatch in R × CC degrades the AD620 CMRR. To
avoid inadvertently reducing CMRR-bandwidth performance,
make sure that CC is at least one magnitude smaller than CD.
The effect of mismatched CCs is reduced with a larger  
Figure 42. Circuit to Attenuate RF Interference
COMMON-MODE REJECTION
Instrumentation amplifiers, such as the AD620, offer high
CMR, which is a measure of the change in output voltage when
both inputs are changed by equal amounts. These specifications
are usually given for a full-range input voltage change and a
specified source imbalance.
For optimal CMR, the reference terminal should be tied to a
low impedance point, and differences in capacitance and
resistance should be kept to a minimum between the two
inputs. In many applications, shielded cables are used to
minimize noise; for best CMR over frequency, the shield
should be properly driven. Figure 43 and Figure 44 show active
data guards that are configured to improve ac common-mode
rejections by “bootstrapping” the capacitances of input cable
 -0-047
Figure 44. Common-Mode Shield Driver
GROUNDING
Since the AD620 output voltage is developed with respect to the
potential on the reference terminal, it can solve many
grounding problems by simply tying the REF pin to the
appropriate “local ground.”
To isolate low level analog signals from a noisy digital
environment, many data-acquisition components have separate
analog and digital ground pins (Figure 45). It would be
convenient to use a single ground line; however, current
through ground wires and PC runs of the circuit card can cause
hundreds of millivolts of error. Therefore, separate ground
returns should be provided to minimize the current flow from
the sensitive points to the system ground. These ground returns
must be tied together at some point, usually best at the ADC
package shown in Figure 45. 

主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。

主营产品各种模块/卡件，控制器，触摸屏，伺服驱动器。

优势：供应进口原装正品，专业停产配件，

发货快，货期准，

主营品牌包括 ABB贝利、GE/FUANC、FOXBORO、英维思TRICONEX 、本特利BENTLY、A-B罗克韦尔、艾默生EMERSON 、OVATION、MOTOROLA、XYVOM、霍尼韦尔HONEYWELL 、力士乐REXROTH、KUKA、NI、DEIF、横河、伍德沃德WOODWARD、瑞恩、施耐德SCHNEIDER 、安川、 穆格MOOG、PROSOFT等品牌