BC810K01模拟量电子模块
MPC4前面板上的LED指示灯
指示是否发生了处理或硬件错误。六个附加LED（每个输入通道一个）指示OK System是否检测到故障以及通道上是否发生报警。MPC4卡有三种版本：“标准”版本、“独立电路”版本和“安全”（SIL）版本，所有这些都使用IOC4T输入/输出卡作为卡对。”MPC4的标准和安全（SIL）版本MPC4卡的“标准”版本和“安全”（SIL。它有一个与VME兼容的从属接口，可通过RS-232（在卡的前面板上）或VME进行完全软件配置。“安全”MPC4卡也称为MPC4 SIL，其开发目的是允许更广泛的安装选项。具体来说，VM600机架还包含状态监测卡（如CMC16和XMx16）和中继卡（如IRC4和RLC16）。为了对这些配置进行安全认证，有必要确保“安全”MPC4与VM600机架中的其他卡隔离，以便其配置不会被无意修改。因此，MPC4的“安全”（SIL）版本不包括与VME兼容的从机接口，也不提供“标准”MPC4卡的所有信号处理功能（见第6页的“规范-“标准”和“独立电路”MPC4s卡）。
MPS和CMS的分离
VM600机架、机械保护卡、状态监测卡和相关软件的设计符合API 670标准的机械保护系统（MPS）和状态监测系统（CMS）“隔离”要求，这确保了MPS的功能不依赖于CMS的操作，也不会因CMS的操作而受到任何损害。因此，尽管机械保护卡和状态监测卡可以轻松共享来自测量链的传感器信号，但MPC4/IOC4T卡对不与VM600机架中的XMx16/XIO16T状态监测卡对共享任何通信总线，和MPC4/IOC4T卡对是使用VM600 MPSx软件配置和操作的（而XMx16/XIO16T卡对则是使用VibroSight®软件配置和运行的）。应用信息MPC4卡非常适合广泛的工业应用中的机械保护。有关使用MPC4卡的更多信息，请参阅VM600功能安全手册MAVM600-FS/E。对于具体应用，请联系您最近的美捷特传感系统代表。对于速度/相位参考输入通道，当选择电流作为信号传输模式时，可能更难达到所需的最小输入电压。因此，200Ω MPC4卡用于电流调制输入信号的电流-电压转换电阻器应在任何系统设计计算中使用，以确保可靠检测。
An LED indicator on the MPC4 front panel
indicates whether a processing or hardware error has occurred. Six additional LEDs (one per input channel) indicate whether the OK System has detected a fault and whether an alarm has occurred on the channel. The MPC4 card is available in three versions: a ‘standard’ version, a ‘separate circuits’ version and a ‘safety’ (SIL) version, all of which function as a card pair using an IOC4T input/output card. ‘Standard’ and ‘safety’ (SIL) versions of the MPC4 Both the ‘standard’ version and the ‘safety’ (SIL) version of the MPC4 card are certified to IEC 61508 and ISO 13849. The ‘standard’ MPC4 card is the original version, intended for safety systems using a VM600 rack with a limited range of cards, that is, ‘standard’ MPC4 / IOC4T card pairs and RLC16 relay cards. It has a VME-compatible slave interface and is fully software configurable via RS-232 (on the front panel of the card) or VME. The ‘safety’ MPC4 card, also known as the MPC4 SIL, was developed to permit a wider range of installation options. Specifically, VM600 racks that also contain condition monitoring cards (such as the CMC16 and XMx16) and relay cards (such as the IRC4 and RLC16). To safety certify these configurations, it was necessary to ensure that the ‘safety’ MPC4 is isolated from the other cards in a VM600 rack, so that there is no possibility of its configuration being inadvertently modified.Therefore, the ‘safety’ (SIL) version of the MPC4 does not include a VME-compatible slave interface, nor does it provide all of the signal processing capabilities of the ‘standard’ MPC4 card (see Specifications – ‘standard’ and ‘separate circuits’ MPC4 cards only on page 6).
Segregation of MPS and CMS
The VM600 rack, machinery protection cards, condition monitoring cards and associated software are designed for compliance with the machinery protection system (MPS) and condition monitoring system (CMS) “segregation” requirements of the API 670 standard, which ensures that the functionality of the MPS does not depend on and is not compromised in any way by the operation of the CMS. So although machinery protection cards and condition monitoring cards can easily share sensor signals from measurement chains, MPC4/IOC4T card pairs do not share any communication buses with XMx16/XIO16T condition monitoring card pairs in a VM600 rack, and MPC4/IOC4T card pairs are configured and operated using the VM600 MPSx software (while XMx16/ XIO16T card pairs are configured and operated using the VibroSight® software).Applications information The MPC4 cards are highly suitable for machinery protection in a wide range of industrial applications. For further information on the use of MPC4 cards, refer to the VM600 Functional Safety Manual MAVM600-FS/E. For specific applications, contact your nearest Meggitt Sensing Systems representative.For speed/phase reference input channels, it can be more difficult to achieve the minimum input voltage required when current is selected as the signal transmission mode. Therefore, the 200 Ω current-to-voltage conversion resistor used by the MPC4 card for current-modulated input signals should be used in any system design calculations in order to ensure reliable detection.
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