The TrolMaster Expander Station 4 (4RS-1) is a hardwired four-outlet power expansion module designed to extend the control capacity of a single TrolMaster Hydro-X plug-in device station. It allows one Hydro-X control channel to operate up to four connected loads, with each outlet using an independent 25A relay. The outlets activate sequentially with a 3-second delay, reducing simultaneous startup inrush from high-draw equipment such as dehumidifiers, exhaust fans, CO₂ generators, and lighting ballasts.
• SKU: 4RS-1
• Controlled Outlets: 4
• Main Power Voltage: 120/240V
• Maximum Main Supply: Up to 50A @ 240VAC
• Relay Rating: 25A per outlet, individual relays
• Sequential Start Delay: 3 seconds between each outlet
• Trigger: 120–240V trigger cable from a compatible Hydro-X plug-in device station
• Input Wiring: 3-wire terminals
• Maximum Wire Size: #6 AWG
• Compatible Device Stations: Hydro-X plug-in style lighting, CO₂, humidity, fan, and similar device stations
• Controller Programming: No additional programming or firmware changes required
• Operating Temperature: 41–140°F (5–60°C)
• Operating Humidity: 0–99% RH, non-condensing
• Installation: Hardwired to a dedicated 120/240V circuit
• Package Dimensions: 275 × 255 × 95 mm
• Shipping Weight: 1.50 kg
• Typical Applications: Multiple dehumidifiers, exhaust fans, CO₂ generators, supplemental lighting, and other grouped high-draw equipment
Key Advantage: The 4RS-1 lets a single Hydro-X device station control four separate loads, while its independent 25A relays and 3-second sequential startup help manage high startup inrush and reduce the risk of nuisance breaker trips when multiple high-draw devices activate simultaneously.