EIA-530/422 Cabling

Use these diagrams as a reference when building or purchasing EIA 530/422 cables. See Tips for Building and Purchasing Cables for cable length and quality concerns.

DB-25 Pin Number	EIA-530/422 Signal	DB-25 Male Connector
2	TxD (A)
14	TxD (B)
3	RxD (A)
16	RxD (B)
15	TxCLKIN (A)
12	TxCLKIN (B)
13	CTS (B)
20	DTE Ready (A)
23	DTE Ready (B)
6	DCE Ready (A)
22	DCE Ready (B)
8	Received Line Signal Detector (A)