ALLEN BRADLEY 1747-L551 PLC Processor
ALLEN BRADLEY 1747-L551 PLC Processor
ALLEN BRADLEY 1747-L551 PLC Processor
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B–14 RS-232 Communication Interface<br />
1746-BAS to a SLC 5/03, SLC 5/04, or SLC 5/05 <strong>Processor</strong>, IBM AT,<br />
1770-KF3, 1775-KA, 1773-KA, 5130-RM, or <strong>PLC</strong>-5 (Hardware<br />
Handshaking Disabled) ➀ NC 1<br />
9 Pin 1746–BAS<br />
1 NC<br />
Peripheral<br />
Device<br />
GND<br />
➂<br />
9 Pin 25 Pin<br />
1<br />
8<br />
➁<br />
2<br />
RXD<br />
TXD<br />
3<br />
2<br />
➁<br />
3<br />
4<br />
TXD<br />
DTR<br />
RXD<br />
DTR<br />
2<br />
4<br />
3<br />
20<br />
5<br />
COM<br />
COM<br />
5<br />
7<br />
➁<br />
6<br />
7<br />
DSR<br />
RTS<br />
DSR<br />
RTS<br />
6<br />
7<br />
6<br />
4<br />
➁<br />
8<br />
CTS<br />
CTS<br />
8<br />
5<br />
9<br />
NC<br />
(DTE)<br />
(DTE)<br />
➀ You can also use cable <strong>1747</strong>-CP3.<br />
➁ Jumpers are only needed if you cannot disable the hardware handshaking on the port.<br />
➂ Connect to the shield of the cable.<br />
1770-KF3 to a Modem (Hardware Handshaking Enabled)<br />
25 Pin 1770–KF3<br />
8 DCD<br />
3 RXD<br />
2 TXD<br />
20 DTR<br />
7 COM<br />
6 DSR<br />
4 RTS<br />
5 CTS<br />
22 NC<br />
(DTE)<br />
➀ Connect to the shield of the cable.<br />
Modem 9 Pin 25 Pin<br />
GND ➀<br />
1<br />
DCD 1 8<br />
RXD<br />
TXD<br />
DTR<br />
COM<br />
DSR<br />
RTS<br />
CTS<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
3<br />
2<br />
20<br />
7<br />
6<br />
4<br />
5<br />
RI 9 22<br />
(DCE)<br />
2760-RB to a Modem (Hardware Handshaking Enabled)<br />
Modem 9 Pin 25 Pin<br />
25 Pin 2760–RB<br />
GND ➀<br />
1<br />
1 GND ➀<br />
DCD 1 8<br />
2 TXD<br />
TXD 3 2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
20<br />
RXD<br />
RTS<br />
CTS<br />
DSR<br />
COM<br />
DTR<br />
RXD<br />
RTS<br />
CTS<br />
DSR<br />
COM<br />
DTR<br />
2<br />
7<br />
8<br />
6<br />
5<br />
4<br />
3<br />
4<br />
5<br />
6<br />
7<br />
20<br />
RI 9 22<br />
(DTE)<br />
(DCE)<br />
➀ Connect the shield of the cable to the GND pin on one end only. Leave the other end open.<br />
Publication <strong>1747</strong>-6.2
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