IBM EasyCoder 3400e RS-232 Null Modem Cable for PC/XT Part Number, Communications Reference

Communications Reference C

RS-232 Null Modem Cable for PC/XT (Part Number 048668)

25-PIN (SOCKET) D-SUB
METAL BACKSHELL
CHASSIS GROUND
	1
TRANSMITTED DATA	2
RECEIVED DATA	3
REQUEST TO SEND	4
CLEAR TO SEND	5
DATA SET READY	6
GROUND	7
DATA TERMINAL READY	20
CARRIER DETECT	8

PC

SHIELD

25-PIN (PLUG) D-SUB

METAL BACKSHELL

1 CHASSIS GROUND

3 RECEIVED DATA

2 TRANSMITTED DATA

8 CARRIER DETECT

20DATA TERMINAL READY

7 GROUND

6 DATA SET READY

4

5CLEAR TO SEND PRINTER

NOTE: The metal backshell is connected directly
to the shield to achieve electrostatic discharge
(ESD) immunity.	3XXXU.010

RS-232 Null Modem Cable for PC/AT (Part Number 048693)

9-PIN (SOCKET) D-SUB
METAL BACKSHELL
RECEIVED DATA
	2
TRANSMITTED DATA	3
CLEAR TO SEND	8
REQUEST TO SEND	7
DATA TERMINAL READY	4
DATA SET READY	6
CARRIER DETECT	1
GROUND	5

AT

SHIELD

25-PIN (PLUG) D-SUB

METAL BACKSHELL

1 CHASSIS GROUND

2TRANSMITTED DATA

3RECEIVED DATA

8 CARRIER DETECT

6 DATA SET READY

20 DATA TERMINAL READY

5 CLEAR TO SEND

4REQUEST TO SEND

7GROUND

PRINTER

NOTE: The metal backshell is connected directly
to the shield to achieve electrostatic discharge
(ESD) immunity.	3XXXU.011

C-9