ProSoft Technology MVI71-DNP - Manual (Page 117)

Reference MVI71-DNP ♦ PLC Platform
DNP 3.0 Master/Slave Communication Module
ProSoft Technology, Inc. Page 117 of 172
August 23, 2007
5.5 Collision Avoidance (DNP modules only)
The RTS line is controlled by the RTS on and off parameters set for the port. If
the CTS line is used (usually only required for half-duplex modems and not
defined for use in the DNPS specification), the RTS and CTS lines must either be
connected together or connected to the modem. The following illustration shows
the cable required when connecting the port to a modem.
If collision avoidance is used in a point-to-point connection on the RS-232
interface, the following cable should be used.