VE4002S2T1模块备件

VE4002S2T1

所有板卡均符合ISA G3腐蚀规范
级电子元件的选择和使用
保形涂层。
脉冲计数器可用于大多数DI卡。被支持的
交流信号的大频率从0.1 Hz变化到
24V直流输入为75或120 Hz。对于较的脉冲计数，
达50 KHz，使用多功能卡的速
脉冲输入。
DeltaV系统提供控制模块级时间
日志事件和警报的标记。为了更大的事件
分辨率，16通道事件序列DI卡
可以提供分辨率为+/-0.25 ms的信号驱动事件
每个卡或每个控制器1ms内。请参阅
事件顺序PDS，以了解有关的详细信息
事件数据收集顺序和系统选项
对于此功能。
DeltaV M系列传统I/O，2022年8月
www.emerson。com/deltav 4
I/O卡冗余
冗余I/O卡可用于关键应用。
同一板卡可用于单工或冗余
应用。安装在双宽冗余终端上时
块，卡被识别为冗余对
控制器。控制器扫描每个卡并确定
卡用作活动接口。当检测到故障时，
系统自动切换到备用I/O卡。
DeltaV控制模块参考、单工和冗余
I/O通道相同，无特殊配置
需要利用冗余。
冗余I/O卡的切换在
I/O总线的两次扫描。先通后断触点，确保
数字现场仪器保持通电状态，且过程
不受干扰。模拟输出信号由以下驱动：
在板卡切换期间，两个板卡的时间均小于5 ms。
硬件警报自动报告硬件完整性错误
用于主卡和辅助卡。任何事件
原因：切换也会通过自动报告
系统硬件发出警报并记录在事件历史记录中。
可能导致切换的事件包括。
„活动卡内的硬件故障。
„活动卡之间的通信故障
以及控制器。
„检测现场接线中的故障。
也可以从诊断中启动切换
以及两个卡的运行状况和状态，以及
它们的通道在诊断资源管理器中可用。
系统自动委托新的备用卡。
在安全区域，故障卡可以在电源下更换。
在危险区域，适当的安装程序
必须遵循。

VE4002S2T1

VE4002S2T1

All cards meet ISA G3 corrosion specifications by the careful selection of superior electronic components and the use of conformal coating. Pulse Counters are available on most DI cards. The supported maximum frequency varies from 0.1 Hz on AC signals to 75 or 120 Hz on 24V DC inputs. For higher pulse counts, up to 50 KHz, use the Multi-Function card’s high speed pulse input. The DeltaV system provides control module level time stamping for log events and alarms. For greater event resolution, the 16-channel Sequence-of-Events DI card can provide signal driven events to a resolution of +/- 0.25 ms per card, or within 1 ms per controller. Please refer to the Sequence-of-Events PDS for more information on Sequence-of-Event data collection and system options for this feature. DeltaV M-series Traditional I/O August 2022 www.emerson.com/deltav 4 I/O Card Redundancy Redundant I/O cards are available for critical applications. The same card can be used in simplex or redundant applications. When installed on a two-wide redundant terminal block, the cards are recognized as a redundant pair by the controller. The controller scans each card and determines which card is acting as the active interface. When a fault is detected, the system automatically switches to the standby I/O card. DeltaV Control modules reference simplex and redundant I/O channels identically and there is no special configuration required to take advantage of redundancy. Switchover of a redundant I/O card is completed within two scans of the I/O bus. Make-before-break contacts ensure digital field instruments remain powered and the process is undisturbed. Analog output signals are briefly driven by both cards for < 5 ms during switchover of the card. Hardware Alerts automatically report hardware integrity errors for both the primary and secondary cards. Any event that causes a switchover is also reported automatically through the system hardware alerts and is logged in the Event Chronicle. Events that can cause a switchover include. „ Hardware failure within the active card. „ Communications failure between the active card and the controller. „ Detection of a fault in the field wiring. A switchover may also be initiated from the diagnostics explorer, and the health and status of both cards and their channels are available in the diagnostics explorer. The system automatically commissions a new standby card. In safe areas, failed cards can be replaced under power. In hazardous areas, appropriate installation procedures must be followed.