MPC4機(jī)械保護(hù)卡是

VM600系列機(jī)械的核心部件

保護(hù)系統(tǒng)（MPS），來自美捷特

Vibro Meter?產(chǎn)品線。這張用途廣泛的卡片

能夠測(cè)量和監(jiān)控

四個(gè)動(dòng)態(tài)信號(hào)輸入，最高兩個(gè)速度

同時(shí)輸入。

動(dòng)態(tài)信號(hào)輸入完全可編程

并且可以接受表示

加速度、速度和位移

（接近）等等。車載多通道處理允許測(cè)量

各種物理參數(shù)，包括相對(duì)

以及絕對(duì)振動(dòng)、Smax、偏心率、推力

位置、絕對(duì)和差速器殼體

膨脹、位移和動(dòng)壓。

數(shù)字處理包括數(shù)字濾波，

整合或差異化（如果需要），

整流（RMS、平均值、真峰值或真

峰值到峰值）、順序跟蹤（幅度和

相位）和傳感器目標(biāo)的測(cè)量

缺口

速度（轉(zhuǎn)速表）輸入接受信號(hào)

來自各種速度傳感器，包括系統(tǒng)

基于接近探針、磁脈沖拾取傳感器或TTL信號(hào)。分?jǐn)?shù)轉(zhuǎn)速表

比率也得到支持。

配置可以用公制或

帝國單位。警報(bào)和危險(xiǎn)設(shè)置點(diǎn)已滿

可編程的以及報(bào)警時(shí)間延遲，

遲滯和鎖存。警報(bào)與危險(xiǎn)

水平也可以根據(jù)

速度或任何外部信息。

內(nèi)部提供數(shù)字輸出（在

對(duì)應(yīng)的IOC4T輸入/輸出卡）

警報(bào)級(jí)別。這些報(bào)警信號(hào)可以驅(qū)動(dòng)四個(gè)

IOC4T卡上的本地繼電器和/或可以

使用VM600機(jī)架的Raw總線或Open進(jìn)行路由

用于驅(qū)動(dòng)可選繼電器的收集器（OC）總線

諸如RLC16或IRC4之類的中繼卡。

處理后的動(dòng)態(tài)（振動(dòng)）信號(hào)和

機(jī)架后部有速度信號(hào)

（在IOC4T的前面板上）作為模擬

輸出信號(hào)。基于電壓（0至10 V）和

提供了基于電流的（4至20mA）信號(hào)。

The MPC4 machinery protection card is the

central element in the VM600 series machinery

protection system (MPS), from Meggitt’s

Vibro-Meter? product line. This very versatile card

is capable of measuring and monitoring up to

four dynamic signal inputs and up to two speed

inputs simultaneously.

The dynamic signal inputs are fully programmable

and can accept signals representing

acceleration, velocity and displacement

(proximity), among others. On-board multichannel processing allows measurement of

various physical parameters, including relative

and absolute vibration, Smax, eccentricity, thrust

position, absolute and differential housing

expansion, displacement and dynamic pressure.

Digital processing includes digital filtering,

integration or differentiation (if required),

rectification (RMS, mean value, true peak or true

peak-to-peak), order tracking (amplitude and

phase) and measurement of the sensor-target

gap.

The speed (tachometer) inputs accept signals

from a variety of speed sensors, including systems

based on proximity probes, magnetic pulse pickup sensors or TTL signals. Fractional tachometer

ratios are also supported.

The configuration can be expressed in metric or

imperial units. Alert and Danger set points are fully

programmable, as are alarm time delay,

hysteresis and latching. The Alert and Danger

levels can also be adapted as a function of the

speed or any external information.

A digital output is available internally (on the

corresponding IOC4T input/output card) for each

alarm level. These alarm signals can drive four

local relays on the IOC4T card and/or can be

routed using the VM600 rack’s Raw bus or Open

Collector (OC) bus to drive relays on optional

relay cards such as the RLC16 or IRC4.

The processed dynamic (vibration) signals and

speed signals are available at the rear of the rack

(on the front panel of the IOC4T) as analog

output signals. Voltage-based (0 to 10 V) and

current-based (4 to 20 mA) signals are provided.