MORNINGSTAR MSC-1 PC Meterbus Adapter Instructions
- June 15, 2024
- Morningstar
Table of Contents
MORNINGSTAR MSC-1 PC Meterbus Adapter Instructions
Description:
The PC Meter bus Adapter (model: MSC-1) converts the Morning star Meter Bus RJ-11 electrical interface to a standard RS-232 interface which allows communication between a PC and a Morning star charge controller or inverter*. The MSC is required for programming custom charging set-points and logging data using Morning star’s Ms View PC software. The MSC is also required for serial communications with any 3rd party hardware that supports Mod bus communication.
- Controllers or inverters with a Meter bus port, but without a serial port or other communications port
Wiring Diagram:
Charge Controller or Inverter
**COM Settings
- 9600 BAUD
- 8 data bits
- 1 or 2 stop bits
- No parity
- No Hardware Flow Control
PC or 3 rd party hardware
Operation:
The MSC is externally powered by the Morning star charge controller or inverter via the RJ-11 connection. A status LED indicates power and communication status. LED indications are as follows:
Green LED – power is applied with correct polarity.
Red/Orange LED flicker – data is successfully being transmitted or received through the adapter. (electrical pin-out diagrams on back)
Electrical Pin-outs:
Notes:
- POWER = V battery Valid range: 8V – 15.5Vdc
- RJ-11 cable wiring is straight through (standard telephone cord)
Notes:
- RS-232 GND is NOT the same ground as RJ-11! The MSC is fully opto-isolated on all pins.
- + power must be asserted on DTR/DSR and/or RTS/CTS pins
- – power must be asserted on RTS/CTS and/or RX pins
- Pins 4 (DTR) and 6 (DSR) are internally connected
- Pins 7 (RTS) and 8 (CTS) are internally connected
Modbus documentation including register locations, scaling, and definitions
can be found on Morning star’s website at:
www.morningstarcorp.com
[email protected]
References
- Solar Charge Controllers & Inverters | Morningstar Off-grid Solar
- Solar Charge Controllers & Inverters | Morningstar Off-grid Solar