ProSoft Technology MVI94-DNP - Manual (Page 75)

MVI94-DNP ♦ Flex I/O Reference
DNP 3.0 Server over Ethernet Communication Module User Manual
ProSoft Technology, Inc. Page 75 of 131
December 17, 2010
5.3 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.