5SHX14H4502高壓變頻模塊
注意安全3U后檢修架應(yīng)始終支撐在
防止前部變形和過載的裝置法蘭盤.電纜
現(xiàn)場接口和繼電器卡上的現(xiàn)場終端最多可接受：
2.5mm?單股或多股導(dǎo)線。電纜應(yīng)小心布線
避免物理和環(huán)境危害，如機(jī)械應(yīng)力和高溫。
傳感器接線應(yīng)由帶接地外部屏蔽的電纜組成
并且應(yīng)遠(yuǎn)離干擾源，如ac電力電纜、電機(jī)、機(jī)械等。所有傳感器電纜均應(yīng)符合
取決于電纜線路電阻的最大電纜長度以及傳感器類型。
電源和繼電器電纜的額定電流應(yīng)始終為：
高于最壞情況下的最大負(fù)載要求。必須屏蔽所有傳感器現(xiàn)場電纜，以確保正確
系統(tǒng)的運(yùn)行并滿足歐洲RFI標(biāo)準(zhǔn)，以及EMC。每個(gè)傳感器的電纜屏蔽應(yīng)連接到
適當(dāng)現(xiàn)場接口或繼電器卡的接地端子，或另一個(gè)合適的接地點(diǎn)。功率要求
系統(tǒng)57從標(biāo)稱24V（18V至32V）直流電源運(yùn)行可從各種來源獲得的電源輸入，包括市電交流，通過單獨(dú)的交流至直流電源裝置，本地工廠直流電源和/或電池備用直流電源。
電源通過直流輸入卡提供給系統(tǒng)57它提供了允許靈活電源連接的接線板以及用于兩個(gè)獨(dú)立電源輸入的二極管隔離。所需的額定功率取決于傳感器類型、數(shù)量
系統(tǒng)57的信道和配置
預(yù)算計(jì)算表允許快速簡便地計(jì)算
系統(tǒng)的最壞情況功率要求。在許多情況下
但是，可以使用更詳細(xì)的功率預(yù)算應(yīng)進(jìn)行分析以確認(rèn)準(zhǔn)確要求。
8路交流至直流電源裝置可提供50W直流電源或100W直流電源，取決于是單開關(guān)模式還是雙開關(guān)模式模塊包含在電源單元中。類似地，16路AC到DC電源單元可以提供
50W、100W、150W和200W直流電源，取決于：一個(gè)、兩個(gè)、三個(gè)或四個(gè)開關(guān)模式模塊包含在電源單元。
CAUTION
3U rear access racks should always be supported at the rear of
the unit to prevent distortion and excessive loading of the front
flange plates.CABLING
The field terminals on the Field Interface and Relay Cards accept up to
2.5mm? single or multi-stranded wire. Cables should be routed carefully
to avoid physical and environmental hazards such as mechanical
stress and high temperatures.
Sensor wiring should consist of a cable with an earthed outer shield
and should be routed away from sources of interference such as ac
power cables, motors, machinery etc. All sensor cabling is subject to a
maximum cable length that is dependant upon the cable line resistance
and sensor types.
The current ratings of the power and relay cables should always be
higher than the worst case maximum load requirement.
All sensor field cables must be screened in order to ensure correct
operation of the system and to meet European Standards for RFI and
EMC. The cable screen of each sensor should be connected to the
GROUND terminal of the appropriate Field Interface or Relay Card or
another suitable ground point.POWER REQUIREMENTS
The System 57 operates from a nominal 24V (18V to 32V) dc power
supply input which can be derived from various sources including the
mains ac, via a separate ac to dc power supply unit, local plant dc
supply and/or battery backup dc supply.
The power supply is applied to the System 57 via the DC Input Card
which provides terminal blocks that allow flexible power connections
and diode isolation for two separate power supply inputs.
The power rating required is dependent upon the sensor types, number
of channels and configuration of the System 57. The following power
budget calculation sheet allows for a quick and easy calculation of the
worst case power requirement for the system. In many cases a lower
power rating can be used, however, a more detailed power budget
analysis should be performed to confirm the exact requirement.
The 8-Way AC to DC Power Supply Units can provide a 50W dc supply
or a 100W dc supply depending upon whether one or two switch mode
modules are incorporated in the power supply unit.
Similarly, the 16-Way AC to DC Power Supply Units can provide a
50W, 100W, 150W and 200W dc supplies depending upon whether
one, two, three or four switch mode modules are incorporated in the
power supply unit.
