Morningstar RD-1 Programmable 4-Channel Relay Driver

The Morningstar RD-1 is a fully programmable 4-channel logic controller engineered for advanced voltage control, fault/alarm signaling, load control, and generator auto-start in off-grid solar and industrial power systems. Operating across 12V to 48V DC nominal systems, the RD-1 can function as a standalone unit reading battery voltage or integrate directly with Morningstar TriStar controllers via MeterBus or RS-232 MODBUS communications.

• MPN: RD-1

• System Voltage: 12V / 24V / 36V / 48V DC nominal (8V to 68V DC operating range)

• Outputs: 4 independent programmable sink channel outputs (750 mA max per channel)

• Self-Consumption: < 20 mA

• Control Functions: Generator auto-start (1, 2, or 3-wire), staged low-voltage disconnect (LVD), temperature-controlled cooling/heating actuation, and MODBUS alarm contacts

• Communication Ports: (2) Opto-isolated RJ-11 MeterBus ports & (1) 9-pin RS-232 serial port

• Mounting: Integrated attachment for standard 35mm DIN rail or flat panel surface mounting

• Operating Temperature Range: -40°C to +45°C

• Programming Software: Fully configurable via PC using Morningstar MSView software

• Certifications & Warranty: CE, RoHS compliant; Conformal-coated PCB; 5-Year Limited