Installation Guide

Morningstar USB MeterBus Adapter Instructions

The USB MeterBus Adapter (model: UMC-1) converts the Morningstar MeterBus RJ-

11 electrical interface to a standard USB 2.0 interface which allows communication

between a PC and applicable Morningstar charge controllers or inverters *. The

UMC-1 is required for programming custom charging set-points and logging data

using Morningstar’s MSView PC software. The UMC-1 is also required for

communication with any 3

party hardware that supports MODBUS

communication.

* Morningstar controllers or inverters that only have a MeterBus connection , i.e. no

serial or other communications port. This includes the Sunsaver MPPT, SunSaver

DUO, and Suresine products.

Notes:

1) 4-conductor or 6-conductor telephone cord is acceptable

2) The UMC-1 is fully opto-isolated. USB electrical ground

is NOT the same ground as RJ-11 / controller.

Modbus documentation including register locations, scaling, and

definitions can be found on Morningstar’s website at:

www.morningstarcorp.com

MS-001373 04/28/2015DS

USB B to USB A cable

(1 meter, included)

RJ-11 telephone cable

(1 meter, included)

Morningstar Charge Controller or

Inverter

PC or

party hardware

Wiring Diagram

UMC-1

LED Indication

IMPORTANT!

No software driver included.

Download the latest USB

driver on our website:

www.morningstarcorp.com/support

OFF: No connection to controller GREEN: Connection OK ORANGE: Communication activity