Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 130)

Appendix C
RS-232 Communication Interface
C–7
1747–KE to a Modem (Hardware Handshaking Enabled)
DSR 6
2
3
4
5
1
7
8
6
3
2
20
7
8
4
5
RXD
TXD
DTR
COM
DCD
RTS
CTS
GND 1
1
3
4
5
6
7
8
9
2
NC
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
9 Pin 1747–KE
9 Pin 25 Pin
➀
(DTE) (DCE)
Modem
9 22 RI
➀ Connect to the shield of the cable.
1747–KE to a 5/03 Processor, IBM AT, 1770–KF3, 1775–KA, 1773–KA,
5130–RM, or PLC–5 (Hardware Handshaking Disabled)
➀
DCD 1
3
2
4
5
6
7
8
8
2
3
20
7
6
4
5
TXD
RXD
DTR
COM
DSR
RTS
CTS
1
3
4
5
6
7
8
9
2
NC
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
9 Pin 1747–KE
(DTE) (DTE)
1 GND
➁
➁
➁
9 Pin 25 Pin
Peripheral
Device
➁
➂
➀ You can also use cable 1747-CP3.
➁ Jumpers are only needed if you cannot disable the hardware handshaking on the port.
➂ Connect to the shield of the cable.