Expander Station 4 (4RS-1)

The TrolMaster Expander Station 4 (4RS-1) is a 4‑outlet power expansion module for the Hydro‑X environmental control system. A single 120–240 V trigger from a Hydro‑X plug‑in device station activates the 4RS‑1, which then powers each outlet in 3‑second intervals to limit inrush current. Each receptacle is switched by its own 25 A relay; the unit is hard‑wired to a 120/240 V circuit rated up to 50 A. Terminals accept up to 6 AWG conductors. Operating specs are 41–140°F and 0–99% RH (non‑condensing). Typical uses include consolidating control of multiple dehumidifiers, mini‑split ACs, or light banks from a single station. Package includes one Expander Station 4; plug is not UL/ETL listed.