Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 133)

Appendix C
RS-232 Communication Interface
C–10
1771–KGM to a Modem (Hardware Handshaking Enabled)
TXD 3
2
7
8
6
5
1
4
2
3
4
5
6
7
8
20
RXD
RTS
CTS
DSR
COM
DCD
DTR
1
3
4
5
6
7
8
2 TXD
RXD
RTS
CTS
DSR
COM
DCD
15 Pin 1771–KGM
(DTE)
(DCE)
22
GND
9 Pin 25 Pin Modem
1 GND
RI 9
11 DTR
➀ ➀
➀ Connect the shield of the cable to the GND pin on one end only. Leave the other end open.
1771–KGM to a 5/03 Processor, IBM AT, 1770–KF3, 1775–KA,
1773–KA, 5130–RM, or PLC–5 (Hardware Handshaking Disabled)
➀
DCD 1
2
3
4
5
6
7
8
8
3
2
20
7
6
4
5
RXD
TXD
DTR
COM
DSR
RTS
CTS
(DTE) (DTE)
9 Pin 25 Pin
Peripheral
1 GND
➁
➁
➁
➁
➂
➂
1
3
4
5
6
7
8
2 TXD
RXD
RTS
CTS
DSR
COM
DCD
15 Pin
GND
11 DTR
1771–KGM
Device
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 the shield of the cable to the GND pin on one end only. Leave the other end open.