5SHX14H4502高压变频模块
注意安全3U后检修架应始终支撑在
防止前部变形和过载的装置法兰盘.电缆
现场接口和继电器卡上的现场终端最多可接受：
2.5mm˝单股或多股导线。电缆应小心布线
避免物理和环境危害，如机械应力和高温。
传感器接线应由带接地外部屏蔽的电缆组成
并且应远离干扰源，如ac电力电缆、电机、机械等。所有传感器电缆均应符合
取决于电缆线路电阻的最大电缆长度以及传感器类型。
电源和继电器电缆的额定电流应始终为：
高于最坏情况下的最大负载要求。必须屏蔽所有传感器现场电缆，以确保正确
系统的运行并满足欧洲RFI标准，以及EMC。每个传感器的电缆屏蔽应连接到
适当现场接口或继电器卡的接地端子，或另一个合适的接地点。功率要求
系统57从标称24V（18V至32V）直流电源运行可从各种来源获得的电源输入，包括市电交流，通过单独的交流至直流电源装置，本地工厂直流电源和/或电池备用直流电源。
电源通过直流输入卡提供给系统57它提供了允许灵活电源连接的接线板以及用于两个独立电源输入的二极管隔离。所需的额定功率取决于传感器类型、数量
系统57的信道和配置
预算计算表允许快速简便地计算
系统的最坏情况功率要求。在许多情况下
但是，可以使用更详细的功率预算应进行分析以确认准确要求。
8路交流至直流电源装置可提供50W直流电源或100W直流电源，取决于是单开关模式还是双开关模式模块包含在电源单元中。类似地，16路AC到DC电源单元可以提供
50W、100W、150W和200W直流电源，取决于：一个、两个、三个或四个开关模式模块包含在电源单元。
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.
