Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 132)

Appendix C
RS-232 Communication Interface
C–9
2760–RB to a Modem (Hardware Handshaking Enabled)
DCD 1
3
2
7
8
6
5
4
8
2
3
4
5
6
7
20
TXD
RXD
RTS
CTS
DSR
COM
DTR
1
3
4
5
6
7
20
2 TXD
RXD
RTS
CTS
DSR
COM
DTR
25 Pin 2760–RB
(DTE) (DCE)
22
GND
9 Pin 25 Pin Modem
1 GND
RI 9
➀
➀
➀ Connect the shield of the cable to the GND pin on one end only. Leave the other end open.
2760–RB 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
7
8
6
5
4
8
2
3
4
5
6
7
20
RXD
TXD
DTR
COM
DSR
RTS
CTS
1
3
4
5
6
7
20
2 TXD
RXD
RTS
CTS
DSR
COM
DTR
25 Pin 2760–RB
(DTE) (DTE)
GND
9 Pin 25 Pin
Perihpheral
1 GND
➁
➁
➁
➁
➂
➂
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.