ProSoft Technology PTQ-AFC User Manual
Page 135
PTQ-AFC ♦ Modicon Quantum Platform
Module Configuration
Liquid and Gas Flow Computer for Hydrocarbon Products
User Manual
ProSoft Technology, Inc.
Page 135 of 259
June 23, 2011
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.
7.1.3 RS-485
Application
Port(s)
The RS-485 interface requires a single two or three wire cable. The Common
connection is optional, depending on the RS-485 network devices used. The
cable required for this interface is shown below: