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ControlLogix Platform "C" Programmable Cable Connections
Linux Application Development Module Developer's Manual
ProSoft Technology, Inc. Page 211 of 264
March 12, 2014
6.2.2 RS-232: Null Modem Connection (Hardware Handshaking)
This type of connection is used when the device connected to the module
requires hardware handshaking (control and monitoring of modem signal lines).
6.2.3 RS-232: Null Modem Connection (No Hardware Handshaking)
This type of connection can be used to connect the module to a computer or field
device communication port.
Note: For most null modem connections where hardware handshaking is not required, the Use
CTS Line parameter should be set to N and no jumper will be required between Pins 7 (RTS) and 8
(CTS) on the connector. If the port is configured with the Use CTS Line set to Y, then a jumper is
required between the RTS and the CTS lines on the port connection.
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