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RS-422 Loopback Connections - Illustration

RS-422 Loopback Connections - Illustration

These diagrams display pin outs and connections for serial RS-422 loopback tests.

Loop back connections can be useful when testing serial ports and to determine if the serial port is working as expected. All connections included may not be necessary for all applications.

Specific model numbers are provided but these will work for other similar converters. 

Model numbers included above:
 - 422ICCA, 422CEC -- 7 channels
 - 422CFC, 422CFCR -- 4 channels
 - 3PXOCC1A, 3PCIOSD1A
 - 3PXCC1A, 3PXCC2A, 3PXOCC2A, 3PCISD2A, 3PCIOSD2A
 - 422COR, 422CON, 422LCOR, 422LCON, 422LP25R, 422LP25N
 - 3PCISD4A
 - 422PP9R, 422LP9R, 422LP9N