Morningstar RD-1 Relay Driver | 4-Channel Logic Module
Advanced control for solar systems, generators, alarms, and more.

Versatile System Control:

• Controls 4 relay outputs for high/low voltage alarms, load shedding, generator start, and temperature-based triggers
• Works with Morningstar TriStar controllers or standalone via battery/input voltage
• Supports auxiliary AC backup charge control

Programmable & Expandable:

• RS-232 serial port for PC programming (MSView software included)
• MODBUS compatible—can be controlled by external devices
• Settings stored in non-volatile memory

Specifications:

System Voltage	12–48 Volts
Max Channel Current	750 mA
Operating Voltage	8–68 Volts
Self Consumption	<20 mA
Temp Sensor Range	–40°C to +85°C
Dimensions	6.4" x 3.2" x 1.3" (16.3 cm x 8.1 cm x 3.3 cm)
Weight	0.4 lb (0.2 kg)

Ideal for off-grid solar systems, industrial automation, and remote energy management. The RD-1 delivers flexible, reliable control at a fraction of the cost of larger PV controllers.