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3BSE042244R1触摸显示屏
屏蔽手持终端被设计用于工业应用。在这种环境中，可能会出现相当大的电磁和静电干扰。由于这个原因，
在以下情况下，特别重视抗干扰性和数据安全性：构建了装置。
涂层HT外壳保护敏感电子设备免受电磁干扰干扰。
由于其特殊结构，HT电缆可确保抗干扰性电缆长度较大的情况。
一、 e.数据线（通信信号）与HT中的控制线路（电源、启用开关、急停、钥匙开关等）缆绳
信号名称以及数据线和控制线的连接如中所述“基本接线图”一章。输入电源线的滤波。
正常情况下，控制柜内的电源线不屏蔽。因此它们必须在HT电缆屏蔽外部布线，以避免敏感数据线
受到其他线路（例如电源线）的干扰。
4.1屏蔽连接
HT电缆的电缆屏蔽可被视为HT屏蔽外壳的延伸，以：通信伙伴的屏蔽外壳（例如：PLC）。就这样，盾牌
电缆屏蔽与设备屏蔽的连接基本上有助于：抗HT干扰。屏蔽不需要接地连接。
对于HT中的屏蔽连接，连接板上的电缆夹为：
习惯于在PLC连接器和适配器插头处，将屏蔽直接连接到连接器外壳：金属化D-SUB连接器外壳将屏蔽直接连接到连接器外壳
使用电缆夹
连接器外壳中的正确屏蔽连接（如PLC连接器或适配器插头）
将屏蔽连接到引脚或端子的清管器不适用。这样的感应性
猪尾表示高频干扰的高欧姆电阻。这似乎中断电缆屏蔽。在这种情况下，干扰不再被吸收，而是直接被吸收
影响内线。屏蔽连接只能通过适当的连接器实现表面接触面积。
带有电缆夹的屏蔽连接会影响屏蔽阻尼。然而，阻尼可能对于在工业环境中出现的干扰信号仍然足够。
在任何情况下，都应避免通过清管器尾部进行屏蔽连接。在这种情况下，屏蔽阻尼HT电缆将减少到不足值。
Shielding
The handheld terminal is conceived for industrial applications. In this environment,
considerable electromagnetic and electrostatic interferences may occur. For this reason,
particular importance was attached to immunity to interferences and data security when the
device was constructed.
The coated HT housing protects the sensitive electronics against electromagnetic
interferences.
Due to its special construction, the HT cable ensures immunity to interferences in
case of larger cable lengths.
I.e. the data lines (communication signals) are shielded and routed separately from
the control lines (power supply, enabling switch, E-stop, key switch, etc.) in the HT
cable.
The signal designations and the connection of data and control lines are described in
the chapter „Basic Wiring Diagram“.
Filtering of incoming power supply lines.
Normally the power supply lines in the control cabinet are not shielded. Therefore
they must be routed outside the HT cable shield to avoid that the sensitive data lines
are disturbed by the other lines (e.g. power supply lines).
4.1 Shield Connections
The cable shield of the HT cable can be considered as extension of the HT shield housing to
the shield housing of the communication partner (e.g.: PLC). In this way the shield
connections of the cable shield to the shields of the devices essentially contribute to the
immunity to interferences of the HT. Connections to ground are not required for shield
connections.
For the shield connection in the HT the cable clamp on the connection board is
used.At the PLC connector and in case of adapter plugs, connect the shield directly to the
connector housing:
Metallized D-SUB connector housing
Connect shield directly to connector housing
using the cable clip
Correct shield connection in connector housing (e.g. PLC connector or adapter plug)
Pig tails to connect the shield to the pins or terminals are not suitable. The inductivity of such
pig tails represents a high-ohmic resistance for high-frequency interferences. This seems to
interrupt the cable shield. In this case interferences are not absorbed any more but directly
affect the inner lines.Shield connections should only be realised with appropriate connectors enabling a large
surface contact area.
Shield connections with cable clamps affect the shield damping. However the damping might
still be sufficient for interference signals occurring in the industrial environment.
In all circumstances, avoid a shield connection via pig tails. In this case the shield damping of
the HT cable would be reduced to insufficient values.
