Okuma BLIV-D7550A控制器

产品详细资料
大于100英尺（30米）的EICM RS-422 Modbus电缆终端RS-422干线电缆终端（点对点或多点）需要在每一端进行终端。传统上，您将电阻器连接到电缆的每一端。该技术与电缆阻抗匹配，并防止可能导致数据错误的信号反射。然而，这种技术有三个不良副作用。•当该对上没有激活的驱动器时，电阻器将两条导线拉在一起。当电线处于这种状态时，噪音，甚至是非常低的噪音，都可能看起来是数据。•当驱动器在对上激活但不发送数据时，电阻器会导致33毫安的直流电流在电缆中流动。这是对驾驶员的过度负荷。•当驱动器在电缆上传输数据时，电阻器会降低信号电平，从而降低对噪声的免疫力。此图显示了端接电缆对的更好技术，即使用RC网络和上拉/下拉电阻器。电阻器值必须与电缆的特性阻抗相匹配。这降低了功耗，并在没有驱动程序处于活动状态时迫使对处于有效数据状态。此图显示了使用双对网络的建议网络终止。电阻器值必须与电缆的特性阻抗相匹配。不需要在任何从设备上提供上拉/下拉电阻器，因为Modbus主设备EICM的配置没有HRDWR握手。这意味着其变送器始终处于启用状态。
EICM RS-422 Modbus Cable Termination RS-422 trunk cable termination (point-to-point or multipoint) greater than 100 feet (30 meters) require termination at each end. Traditionally, you connect resistors to each end of the cable. This technique matches the cable impedance and prevents signal reflections which could cause data errors. However, this technique has three undesirable side effects. • When no driver is active on the pair, the resistors pull the two wires together. Noise, even very low-level noise, can be appear to be data when the wires are in this state. • When a driver is active on the pair but not sending data, the resistors cause 33 mA of DC current to flow in the cable. This is an excessive load on the driver. • When a driver is transmitting data on the cable, the resistors lower the signal level and consequently lower the immunity to noise. This figure shows a better technique for terminating the cable pair, which is to use an RC network and pull-up/pull-down resistors. Resistor values must match the characteristic impedance of the cable. This reduces power consumption and forces the pair to a valid data state when no driver is active.This figure shows the recommended network termination using a double-pair network. Resistor values must match the characteristic impedance of the cable. There is no need to provide pull-up/pull-down resistors at any of the slaves because the Modbus master EICM is configured without HRDWR handshake. This means its transmitter is always enabled.
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，货期精准，

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。

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●使用前:

在操作和维护，安装设备之前，请阅读并严格遵守安全相关的信息。

Read and strictly follow safety-related information before operatingmaintainingand installing equipment.

●使用者要求:

必须从事安装，组装或维护设备等相关工控电气机械以及其他相关技术的人员。

Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:

应用于品牌本系列工业以及生产生活自动化设备产品。

Used in the brand of this series of industriaand production automation eauipment products

适用于场景:系统集成，非标定制，产线升级改造，原设备电气替换等等。

Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.

●操作人员:

应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强，熟悉安全信息和安全实施:

熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。

Equipment should be installed,operated and maintained by trained operators from the brand

●危险情况

警告

.请注意使用人员的人身安全。

●除了产品特性以及功能，还需了解产品的使用寿命环境。

●充分学习产品使用手册，否则非专业人员可能会造成人身危险。

Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.

●服务行业

适用水泥，木业，石业，橡胶，石油，化工，发电，环保，水处理，制冷，交通，钢铁，食品，饮料，船舶，制冷等行业

Applicable to cementwood,stone,rubber,petroleumchemical, power generation