产品详细资料
Invensys保证OVD强制故障具有以下持续时间:•对于交流模块,不超过1/2交流周期。•对于直流模块,小于2毫秒(通常为500微秒),这是继电器、螺线管和接触器等机电设备可以很好地容忍的时间段。如果受控过程需要,可以禁用OVD;然而,它必须周期性地循环到开和关状态,以确保100%的故障覆盖率。对于不能容忍任何长度的信号转换的设备,可以禁用交流和直流电压数字输出模块上的OVD。有关更多信息,请参阅第283页禁用DO模块上的输出表决器诊断。交流电压数字输出模块在交流电压数字输入模块上,由OVD过程识别的故障开关会导致输出信号转换到相反状态,多持续1/2个交流周期。这种转变可能并非对所有现场设备都是透明的。一旦检测到故障,模块将停止OVD的进一步迭代。如果受控过程需要,可以禁用OVD;然而,它必须周期性地循环到开和关状态,以确保100%的故障覆盖率。
Invensys guarantees that an OVD-forced glitch has the following durations: • For AC modules, no longer than 1/2 AC cycle. • For DC modules, less than 2 milliseconds (typically 500 microseconds), which is a period that is tolerated well by electro-mechanical devices such as relays, solenoids, and contactors. If required by the controlled process, OVD can be disabled; however, it must be periodically cycled to both the On and Off states to ensure 100 percent fault coverage. For devices that cannot tolerate a signal transition of any length, OVD on both AC and DC voltage Digital Output Modules can be disabled. For more information, see Disabling Output Voter Diagnostics on DO Modules on page 283. AC Voltage Digital Output Modules On AC voltage Digital Output Modules, a fault switch identified by the OVD process causes the output signal to transition to the opposite state for a maximum of 1/2 an AC cycle. This transition may not be transparent to all field devices. Once a fault is detected, the module discontinues further iterations of OVD. If required by the controlled process, OVD can be disabled; however, it must be periodically cycled to both the On and Off states to ensure 100 percent fault coverage.
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,
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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