ProSoft Technology MVI69E-LDM - Manual (Page 93)

MVI69E-LDM ♦ "C" Programmable Contents
Linux Application Development Module Developer's Manual
ProSoft Technology, Inc. Page 93 of 130
August 21, 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.