Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 134)

Appendix C
RS-232 Communication Interface
C–11
1775–KA to a Modem (Hardware Handshaking Enabled)
DCD 1
2
3
4
5
6
7
8
8
3
2
20
7
6
4
5
RXD
TXD
DTR
COM
DSR
RTS
CTS
GND 1
8
2
20
7
6
4
5
22
3
DCD
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
25 Pin 1775–KA
9 Pin 25 Pin
➀
(DTE) (DCE)
Modem
9 22 RI
➀ Connect to the shield of the cable.
1775–KA to a 5/03 Processor, IBM AT, 1770–KF3, 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
GND 1
8
2
20
7
6
4
5
22
3
DCD
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
25 Pin 1775–KA
9 Pin 25 Pin
(DTE) (DTE)
Peripheral
➁
➁
➁
➁
Device
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.