IS200VRTDHD备件模块
JMP和IN+s连接inrl分流器。这将电流转换为伏特信号。跳线布置在相邻的跳线上，允许使用商用跳线条，同时允许跳线和跳线。跨接IN应参考隔离电流源。n isolad回路通常应具有回路电源的回路侧与模拟电路连接。通常，一个电源供应多个回路，最好将电源放置在模拟输入附近。如果电源是远程的，则在回路电源的mon侧或d侧返回IN侧。现场接线应屏蔽。可以使用三元组四元组或多元组。屏蔽通常在最接近建立模拟接地或监控的一端接地。如果有疑问，请接地。为方便起见，提供了接地。通过在不接地端增加具有微法电容的屏蔽地的交流旁路，可以减少高噪声环境引起的数据偏差。Alog Input Sysm High level s F Alog s August Controlr数据表F在极端环境中，如果屏蔽不带任何模拟信号或模拟电源电压，则屏蔽可以在两端接地。对于从控制外壳外部的电源传导的电流或浪涌，应考虑使用接地棒或卡箍将屏蔽直接接地至金属外壳，从而在外壳的内部位置安装屏蔽。这使得接地阻抗比上的可能值低了μ。屏蔽继续向上延伸，但不需要连接。电压输入Ex电压源｛I｝IN+在源｛I｝IN+optiol｛I}IN+{I}IN处接地+电压源Isolad系统模拟或低噪声接地ALG桥滑动本地系统接地V V++电流输入Ex｛I}IN+｛I}IN+opteol｛I｛IN+{I｝IN+系统模拟或高噪声接地ALG I回路电源回路供电I+输出源I Isolad源I多降欧姆x本地系统接地线FAlog Input Sysm High level s Alog s August Controlr Data Sheet F ANLG是所有信号输入的参考级别。对于rl操作，当输入信号参考接地时，ANLG可能会打开，因为它通过RC直接接地，如图所示。所有输入信号必须在ANLG获得指定性能的C伏范围内。V I N I N V车载电源和机架上的接地接地，从V背板图输入。ANLG连接接地对于输入信号未参考接地的应用，ANLG之间可引入偏置电压，如图所示，确保输入在共模限值C V内。使用Base ConverterExpander子体积的所有输入在Base单元上被称为ANLG。ANLG的偏置电压相对于接地为C。如果任何输入值出现波动，请确保所有输入值都已连接。扩展总线基本转换器和扩展器上的板上的botm 6 s通组成一条扩展总线，用于连接输入扩展器和基本转换器。扩展器上的模拟多路复用器充当模拟输入的开关连接，一次一个，基础转换器上的alog数字转换器。输入采样方法模拟子系统的输入采样方法的目的是在具有快速更新的基础上提供输入，以及经常更新但成本较低的附加扩展器。操作是假设基础最初更新为所有八个s加一个扩展器。在一次连续扫描中，所有八个基本凸起都会再次上升，再加上下一个扩展器。在模拟输入扫描之后，已对第一个扩展器的所有部分进行采样；在下一次扫描时，扫描所有八个基本转换器加上下一个扩展器的第一个。这种取样方法一直持续到所有膨胀机
JMP and IN+ s connect the inrl shunt. This converts the current a volt sigl. Jumpers are arranged on adjacent s permit use of mercially ailab jumper strips whi allows for both jumper and in the same . Isolad current sources should be referenced by jumpering IN . n isolad loops usually should have the return side of the loop supply connecd the alog mon. Usually one supply sources several loops and it is preferab loca the supply near the alog input. The IN side is returned either at the or d back the mon side of the loop supply if the supply is remo. Field wiring should be shielded . Twisd triad twisd or multip cab y be used. Shields are usually grounded at the end nearest where alog sigl ground or mon is established. Ground at the if in doubt. Ground s are provided for convenience on the . riations in data caused by high ise environments are ofn reduced by additiol AC bypass of the shield ground with a microfarad capacir at the ungrounded end. Alog Input Sysm High vel s F Alog s August Controlr Data Sheet F In extreme ise environments the shield can be grounded at both ends provided the shield is t used carry any alog sigl or alog supply voltages. For ise or surges conducd from sources outside the control enclosure you should consider rmiting the shield at the ining location of the enclosure either using a ground bar or a collar clamp whi grounds the shield directly the metallic enclosure. This gives a mu lower ground impedance than possib on the . The shield is continued up the but does t require connection at the . Voltage Input Ex Voltage Source {I} IN + Grounded at source {I} IN + optiol {I} IN + {I} IN + Voltage Source Isolad Sysm alog mon or low ise quiet Ground ALG Bridge Slide Local Sysm Ground V V + + Current Input Ex {I} IN + {I} IN + optiol {I} IN + {I} IN + Sysm alog mon or low ise quiet Ground ALG I Loop Supply loop powered I + Out source I Isolad Source I Multip drops ohms x Local Sysm Ground F Alog Input Sysm High vel s Alog s August Controlr Data Sheet F ANLG is the reference vel for all sigl inputs. For rl operation when the input sigls are referenced ground the ANLG y be ft open since it is inrlly connecd ground through an RC as shown in Figure . that all input sigls must be within Ç volts of ANLG obtain specified perfornces. V I N I N V V ONBOARD POWER SUPPLY ANLG GROUND EARTH GROUND ON RACK ag MON INPUT FROM V BACKPLANE Figure . ANLG Connection Ground For applications in whi the input sigls are t referenced ground an offset voltage y be introduced between ANLG and as shown in Figure ensure that the input is within the mon mode limits of Ç volts. that all inputs for a sing Base ConverrExpander subsysm are referenced ANLG on the Base unit. The offset voltage for ANLG is Ç with respect earth ground. If any of the inputs appear be fluctuating in lues ensure that all s are connecd or . Expansion Bus The botm six s through on the board on the Base Converr and Expander s ke up an expansion bus for connecting input Expander s the Base Converr . An alog multipxer on the Expander acts as a switing connect alog inputs one at a time the Alog Digital converr on the Base Converr . Input Sampling niques The objective of the input sampling nique for the alog subsysm is provide input s on the base that have a fast approxily ms upda ra and additiol expander s that are updad ss frequently but have a lower cost per . Operation is su that the base initially updas all eight s plus one expander . On ea successive scan all eight s of the base converr are again updad plus the next expander in sequence. Afr alog input scans all s of the first expander have been sampd; on the next scan all eight base converr s plus the first of the next Expander are scanned. This sampling nique continues until all ailab expander
