Product data

25Morningstar Product Connectivity Manual
4.2.2 USB / Serial (USB / RS-232)
To connect the serial RS-232 connection on a Morningstar product to a USB port on a PC, a USB
to Serial adapter cable is needed. See Subsection 2.2.8 for a info and a recommendation of a
compatible USB to Serial adapter. Figure 23 below illustrates a proper connection.
Figure 23. USB / Serial Connection Diagram
Once connected, please refer to Section 5 on how to make Local Connections in MSView
TM
.
4.2.3 Serial (RS-232) / RJ-11
The SunSaver Duo, SunSaver MPPT, and SureSine do not have RS-232 connections, however,
they are programmed to use their RJ-11 connections for MODBUS serial communications. To
convert the RJ-11 to RS-232 a Morningstar PC MeterBus
TM
Adapter is needed (sold separately).
Connect your computer’s serial port to the RS-232 connection on the adapter, then connect the
adapter and the Morningstar device’s RJ-11 ports with a 4 or 6 conductor phone cable. Figure 24
below illustrates a proper connection.
Figure 24. Serial / RJ-11 Connection Diagram
Once connected, please refer to Section 5 on how to make Local Connections in MSView
TM
.
4.2.4 USB / Serial (DB-9) / RJ-11
If your computer does not have a serial (DB-9) connector and the device you are attempting to
connect to has only an RJ-11 port, a USB to serial to RJ-11 transition must take place. A Morn-
ingstar PC MeterBus Adapter (model:MSC) is required. Figure 25 below illustrates the proper
connection.