Skip to content
Professional Series
Morningstar RSC-1 Communications Adapter
Converts RS-232 to EIA-485 using MODBUS protocol.
Morningstar Model Number RSC-1
Connectors RS-232, EIA-485 Terminal
Baud Rate 9600 baud
Input Power Voltage 8V - 16V DC
Self-Consumption 8-16mA
EIA-485 Network Unit Load 1/4
Dimensions 2.83" x 1.37" x .90"
Weight 1.3 oz.

Morningstar RSC-1 EIA-485/RS-232 Communications Adapter

Morningstar charge controllers

Morningstar RSC-1 EIA-485/RS-232 Communications Adapter

RSC-1 EIA-485 RS-232 adapter converter

The Morningstar EIA-485 / RS-232 Communications Adapter (RSC-1) enables networking capability by converting a controller or inverter’s RS-232 port to a standard EIA-485 serial connector using the standard MODBUS protocol.

By converting to EIA-485, the RSC-1 allows up to 128 Morningstar products to communicate on the same communication bus over much greater distances than RS-232. The RSC-1 may be used with any Morningstar controller or inverter equipped with an RS-232 port.

RSC-1 RS-232 cable
RS-232 cable for components is included. Null modem crossover cable for PC is not included.

RSC-1 Adapter Features

• Removable four (4) position EIA-485 terminal
• 9-pin RS-232 connector (male)
• Status LED for monitoring and diagnostics
• Molded tabs for attachment to 35mm standard DIN rail
• RS-232 ribbon cable with low-profile connectors

RSC-1 RS-232 EIA-485 Modbus network review
Typical example of an EIA-485 Modbus network using multiple Morningstar products.

What is the Modbus Protocol?

MODBUS® Protocol is a messaging structure developed by Modicon in 1979, used to establish master-slave/client-server communication between intelligent devices. It is a de facto standard, truly open and the most widely used network protocol in the industrial manufacturing environment. It is literally implemented by hundreds of vendors on thousands of different devices in order to transfer discrete/analog I/O and register data between control devices. It’s really a lingua franca or common denominator between different manufacturers. One report called it the “de facto standard in multi-vendor integration”.

Morningstar RSC-1 Warranty

All of Morningstar’s charge controller components are warranted to be free from defects in material and workmanship for a period of FIVE (5) years from the date of shipment to the original end user. Morningstar will, at its option, repair or replace any such defective products.

RSC-1 Certifications



Contact us toll-free: (877) 297-0014

Read more about Morningstar charge controllers.

Solar Electric Supply specializes in supplying dealer, contractor, government and industrial accounts worldwide with reliable, cost-effective solar + storage battery backup system solutions.

Contractor Discounts  ·  Solar + Storage  ·  Remote Solar Systems  ·  Morningstar Charge Controllers


Contact us toll-free: (877) 297-0014 for expert assistance and wholesale prices for Morningstar charge controller accessories like the RSC-1.