MORNINGSTAR MSC Instructions Manual

Description:

The PC Meterbus Adapter (model: MSC) converts the Morningstar MeterBus RJ-11 electrical
interface to a standard RS-232 interface which allows communication between a PC and a
Morningstar charge controller or inverter**. The MSC is required for programming custom
charging setpoints and logging data using Morningstar’s MSView PC software. The MSC is
also required for serial communications with any 3

rd

party hardware that supports Modbus

communication.

** controllers or inverters with a Meterbus connection that do not have a serial port or other communications port

PC or

Wiring Diagram:

rd

party hardware

3

Charge Controller or Inverter

MSC

`

RJ-11 Cable

RS-232 Pin-out:

(2) TX

(3) RX

Serial DB-9 pin-out

(4) DTR

(5) GND

(7) RTS

Notes:

1. Virtually all PC serial ports conform to the MSC pin-out requirements.

2. RS-232 GND is NOT the same ground as RJ-11! The MSC is fully opto-isolated on all pins.

3. + power must be asserted on DTR and/or RTS pins

4. – power must be asserted on RTS and/or RX pins

Modbus documentation including register locations, scaling, and

definitions can be found on Morningstar’s website at:

MSC Input

www.morningstarcorp.com

Serial Cable

COM Settings:

9600 BAUD
8 data bits
1 or 2 stop bits
No parity
No Hardware Flow Control

MS-ZMAN-MSC-03-A