HONEYWELL TK-PRR021工控模块,TK-PRR021中文PDF使用手册
在将其与其中一个基板一起使用之前。定制Y形电缆应使用图10-20建造基板。远程基板IC693CHS393F（及更高版本）和IC693CHS399E（及更高版本）具有更换底板内部，从而无需从配合件上拆下销1缆绳当将工厂制造的Y形电缆与这些基板一起使用时，无需从电缆上拆下针脚1。可以为这些基板定制Y形电缆使用图10-20或图10-21。图10-21显示了标准（工厂制造）制造Y形电缆。通过移除为早期版本的remote定制的Y形电缆中的针脚1基板，引脚7（0V）信号参考源于主（CPU）基板。
HONEYWELL TK-PRR021工控模块在里面在这些早期版本的远程基板上，插脚1与插脚7（0V）相连，还与交流电源相连耦合到远程机架接地。当将这些基板与100%屏蔽Y形电缆的引脚7（0V）参考将不正确地进行直流耦合通过D-超小型连接器外壳（直流）连接至远程机架接地耦合到远程机架接地。在远程基板IC693CHS393F（及更高版本）和IC693CHS399E（及更高版本）中引脚1屏蔽信号直流耦合至远程机架接地，不连接至引脚7（0V）。这通过提供良好的连续电缆屏蔽来实现最佳抗噪性，并且仍然允许引脚7（0V）信号参考源于CPU基板，而无需需要拆除任何工厂或定制电缆中的针脚1。D超小型连接器外壳仍然直流耦合到远程机架接地。
baseplate before using it with one of these baseplates. Custom built Wye cables for these
baseplates should be built using Figure 10-20.
Remote baseplates IC693CHS393F (and later) and IC693CHS399E (and later) have a
change inside the baseplate which eliminates the need to remove pin 1 from the mating
cable. When using factory made Wye cable with these baseplates, it is not necessary to
remove pin 1 from the cable. Custom built Wye cables for these baseplates can be made
using either Figure 10-20 or Figure 10-21. Figure 10-21 shows how the standard (factory
made) Wye cables are made.
By removing pin 1 in custom built Wye cables made for the earlier versions of remote
baseplates, the pin 7 (0V) signal reference originates in the main (CPU) baseplate. In
these earlier versions of the remote baseplates, pin 1 was tied to pin 7 (0V) and also AC
coupled to the remote frame ground. When using these baseplates in combination with
the 100% shielded Wye cables, the pin 7 (0V) reference would be improperly DC coupled
to the remote frame ground through the D-subminiature connector shell, which is DC
coupled to the remote frame ground.
In the remote baseplates IC693CHS393F (and later) and IC693CHS399E (and later), the
pin 1 shield signal is DC coupled to the remote frame ground and not attached to pin 7
(0V). This allows the best noise immunity by providing a good continuous cable shield,
and still allows the pin 7 (0V) signal reference to originate in the CPU baseplate without
the need for removing pin 1 in any factory or custom built cable. The D-subminiature
connector shell is still DC coupled to the remote frame ground.
