ProSoft Technology ProLinx S3964R Manual de usuario Pagina 68

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MVI69-S3964R CompactLogix or MicroLogix Platform Reference
Siemens 3964R Protocol
Page 68 of 80 ProSoft Technology, Inc.
October 31, 2008
5.3.2 RS-232
When the RS-232 interface is selected, the use of hardware handshaking
(control and monitoring of modem signal lines) is user definable. If no hardware
handshaking will be used, the cable to connect to the port is as shown below:
5.3.3 RS-232 Cable
The assignment of the RS-232 connection cable between PRT1/2 (9 pole) and
CP-544 (25 pole) is as follows:
PRT1/2 Pin Description CP 544 Pin Description
2 RxD 2 TxD
3 TxD 3 RxD
5 Gnd 7 Gnd
Important: The other pins of the RS-232 must not be used.
5.3.4 RS-422
RS-422 Tip
If communication in the RS-422 mode does not work at first, despite all attempts,
try switching termination polarities. Some manufacturers interpret +/- and A/B
polarities differently.
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