Serial Cables

PWI000087

Context

this document applies to :

  1. All versions of PowerINSPECT and all versions of CMMDriver

Summary

The SpyComm help file which installs with PowerINSPECT in the dcam\product\PowerINSPECTXXXX directory explains RS232 serial cables in full.  Go to Index- Standard Cables.  This technical note just shows a pin configuration that should work in most situations.

Description

RS-232 stands for Recommend Standard number 232 and C is the latest revision of the standard. The serial ports on most computers use a subset of the RS-232C standard. The full RS-232C standard specifies a 25-pin "D" connector of which 22 pins are used. Most of these pins are not needed for normal PC communications, and indeed, most new PCs are equipped with male D type connectors having only 9 pins.

The SpyComm help file which installs with PowerINSPECT in the dcam\product\PowerINSPECTXXXX directory explains RS232 serial cables in full.  Go to Index- Standard Cables.  

Here however is a pin configuration that should work in most situations.

For back to back 9 pin connections, you can usually use this configuration 2-3, 3-2, 7-8, 8-7, 5-5, 6-4, 4-6 as this usually satisfies any device that requires certain control signals (CTS and DSR) to be honoured.