公司主营产品图展示
产品优势
1：国外专业的供货渠道，具有价格优势
2：产品质量保证，让您售后无忧
3：全国快递包邮
4：一对一服务
产品详情介绍
FOXBORO 0399071D逻辑卡件
当使用电阻温度计时，常数电流必须流过传感器电阻器，以便建立评估所需的电压降单元模拟模块提供两个常量用于此目的的电流汇。下图显示了Pt100的配置和Pt1000电阻温度计。模块线性化温度电阻曲线为Pt100/Pt1000配置2 mA和0.2 mA的集成电流汇也是在这些测量配置中进行补偿。以下三段描述了分配集成电流汇的数量：连接至端子5至15（信道EA n，00至EA n，03），可使用端子16或17处的两个接收器中只有一个（2 mA或0.2毫安）。连接至端子24至34（通道EA n，04至EA n，07），可以仅使用端子35或36处的两个水槽中的一个（2毫安或0.2毫安）。同时使用Pt100和Pt1000传感器是可能的一组传感器（例如Pt100）可以是连接到上部端子，另一组（例如。Pt1000）至下部端子。端子7、10、13、26、29和32（标有NC）可以用作当前回路的连接标记（请参见图5.2.4–2）。独立于模拟表示a或b–50°C…400°C的测量范围线性分配给数字范围为–1022…+8190（另请参见图5.2.5–7至5.2.5–9）。如果输入电压超出测量范围，则输出+32767的溢出数。
如果输入电压下溢测量范围，下溢数值输出–32767的。
在这两种情况下，错误消息都是通过CS31系统总线发送。如果电流回路中出现断线（开路），输出数字–32767。如果电线断裂（开路电路），则数字+32767为输出在这两种情况下，都会通过CS31系统总线。如果未使用的Pt100/Pt1000通道将连接到一个跳线，它的电阻为0会假装极低温度的测量值。因此将输出错误消息“Underflow”。整齐为了防止此类错误消息，未使用的Pt100/Pt1000通道应按以下方式终止：120电阻Pt 100Pt 100 0，电阻为1200其他连接温度相关电阻器原则上，所有温度相关电阻器都可以连接到模块而不是Pt100/Pt1000传感器。作为配置，设置为+5 V、+500 mV和+50 mV适用。如有必要必须执行温度-电阻曲线使用PLC程序。集成电流汇可以使用。在执行此操作时，必须遵守以下要求：–所有串联电阻的电压降不能大于7 V（使用0.2 mA的电流接收器），2.5 V（使用2 mA的电流接收器）。–集成电流汇的公差为+ 1,5 %. 中的模块没有补偿此应用程序。这与Pt100/Pt1000设置。
Resistance thermometers which are connected to the terminals 24 to 34 (channels EA n,04 to EA n,07), may use only one of the two sinks at the terminals 35 or 36 (2 mA or 0.2 mA). Use of Pt100 and Pt1000 sensors at the same time is possible. One group of the sensors (e.g. Pt100) can be connected to the upper terminals, the other group (e.g. Pt1000) to the lower terminals. The terminals 7, 10, 13, 26, 29 and 32 (labelled with NC) can be used as connecting tags for the current loops (see also Fig. 5.2.4–2). Independent of the analog representation a or b, the measuring range of –50°C...400°C is allocated linear to the number range of –1022...+8190 (see also the figures 5.2.5–7 to 5.2.5–9). If input voltages overflow the measuring range, the overflow number of +32767 is output. If the input voltage underflows the measuring range, the underflow number of –32767 is output. In both cases, an error message is sent via the CS31 system bus. If a broken wire (open circuit) occurs in the current loop, the number –32767 is output. If a broken wire (open circuit) occurs in the sensor line, the number +32767 is output. In both cases, an error message is sent via the CS31 system bus. If unused Pt100/Pt1000 channels would be connected to a wire jumper, its resistance of 0 would pretend the measuring value of a very low temperature. As a result, the error message ”Underflow” would be output. In order to prevent such error messages, unused Pt100/Pt1000 channels should be terminated as follows: Pt 100 by a resistor of 120 Pt 100 0 by a resistor of 1200 Connection of other temperature–dependent resistors In principle, all temperature–dependent resistors can be connected to the module instead of Pt100/Pt1000 sensors. As configurations, the settings + 5 V, + 500 mV and + 50 mV are suitable. If necessary, the linearization of the temperature–resistance curve must be performed with the PLC program. The integrated current sinks can be used. In doing so, the following has to be observed: – The voltage drop over all resistors circuited in series may not be greater than 7 V (using the current sink of 0.2 mA), 2.5 V (using the current sink of 2 mA). – The tolerance of the integrated current sinks is + 1,5 %. There is no compensation by the module in this application. This is a difference compared with the Pt100/Pt1000 settings.
