Rockwell Automation 2706-NP3 DL20 OFFLINE PROGRAMMING MANUAL - Manual (Page 65)

A–B
A
Appendix
A–1
Connection Diagrams
This appendix provides connection diagrams that you can use to
make your own cables.
Figure A.1
Connecting DL20 to an XT (25-Pin) Compatible Computer
RS-232 IN (Clear)
RS-232 OUT (Red)
Ground (Black)
7
6
8
2
3
7
1
TXD
RXD
Signal GND
SHIELD (frame ground)
DL20 RS-232 Serial Port
Lug Connections
25-Pin Serial Port
Computer COM1
The wire colors refer to the Allen-Bradley Catalog No. 2706-NC1 and -NC2 cables.
Figure A.2
Connecting DL20 to an AT (9-Pin) Compatible Computer
RS-232 IN (Clear)
RS-232 OUT (Red)
Ground (Black)
7
6
8
2
3
5
1
RXD
TXD
Signal GND
SHIELD (frame ground)
DL20 RS-232 Serial Port
Lug Connections
9-Pin Serial Port
Computer COM1
The wire colors refer to the Allen-Bradley Catalog No. 2706-NC1 and -NC2 cables.
The shield ground of the Adapter Cable should connect to Pin 1 at the computer end only.
Figure A.3
25-to-9 Pin Adapter Cable (Null Modem)
2
XMT
Signal GND
Signal GND
RCV
To 2706-NC2 or -NC7 Cable
(25-Pin D Shell Connector)
To Computer Serial Port
(9-Pin Female D Shell Connector)
Shielded cable is recommended for accurate data transmission
3
7
2
3
5
1