EIA-232 Boards with DB-25 Fanout Cables Assemblies (see part numbers below) - Aceleport 4e, Acceleport     8e, Acceleport 4r, Acceleport 8r, Acceleport 4r 920, Acceleport 8r 920, PC/4e, PC/8e, MC/4e, MC/8e, Acceleport XEM (ports8em DB-25, ports16em DB-25), Classic 4, Classic 8, Acceleport C/X (C/CON-8 DB-25, C/CON-16 DB-25), Acceleport EPC/X (EPC/CON-8 DB-25, EPC/CON-16 DB-25)

• 4 Port Cable DB-25 Male          - Part #76000008
• 4 Port Cable DB-25 Female       - Part #76000006
• 8 Port Cable DB-25 Male          - Part #76000030
• 8 Port Cable DB-25 Female       - Part #76000026
• 4 Port Assembly DB-25 Male    - Part #76000030
• 8 Port Assembly DB-25 Female - Part #76000031
• C/CON-8 DB-25                      - Part #76000218
• C/CON-16 DB-25                    - Part #76000069
• EPC/CON-16 DB-25                - Part #76000060
• Ports8em DB-25                        - Part #76000120
• Ports16em DB-25                      - Part #76000073

The wiring diagram for a DB-25 pin to DB-25 pin modem cable is shown in Figure 1.

Table 1:  EIA-232 DB-25 Pinout

From DB-25	Direction	Signal
2		TxD
3		RxD
4		RTS
5		CTS
6		DSR
7		SG
8		DCD
20		DTR
22		RI
Shell		GND

• Arrows indicate which direction the signal is flowing

NOTES:

• EIA-232 cables connot exceed 2500pF.  For information about calculating capacitance of your cable, click here.
• For information regarding the EIA-232/EIA-422/EIA485 specifications, click here.