243A12280X CONEC

Filter D-SUB Connectors Section 3 Filter D-SUB Connectors At increasing data transfer rates and operating frequencies it becomes increasingly important to safeguard the function of electrical devices and systems in their interactive relationship so that operation can be free of interference. This is also the clear objective of the EMC law. In applications where connectors penetrate shielded enclosures commonly represent a breakdown in shielding since the connectors plastic isolating body provides no shielding against any inter ference signals that may be present. Therefore high frequency interference signals can be passed in or out of the system without hindrance. The connectors contacts act as antennas that receive and transmit interference signals because filtering is typically implemented on the PC board. Interface connectors with integrated filters can be of benefit in these cases. CONEC filter D-subminiature connectors contribute to the protection of EMC zones. The intergrated filter inside the connector saves PCB-space and can be installed into an existing PCB layout. To replace an unfiltered connector into filtered one is simple and effective. One of the standard filters offered by CONEC is the so-called C filter. Depending on the problem situations, other possible variations can be employed a two-stage LC filter and a three stage PI filter (C-L-C) are also available in various connector configurations within the standard product line. Filter D-SUB Connectors Section 3 Filter D-SUB Connectors In some cases EMC problems do not become apparent until after a device has been put into service where it is exposed to interference in its installed location. Ambient conditions and the device influence one another mutually. Where EMC problems arise under certain operating conditions, CONECs broad product line of standardized D-SUB filter adapters with a myriad of filter capacities and different filter technologies represents a quick and effective solution. Retrofit to the existing D-SUB interface connector, this can prove to be the solution to many different EMC problems. The CONEC team will be glad to help you select the right product. 3 1