240V Expander Station 4: 4 outlet with trigger cable

Four-Outlet Power Expansion With Staggered Startup

A single TrolMaster device module can only switch so much equipment before it's overloaded, and starting several large devices at the exact same instant creates an inrush current spike that trips breakers or stresses components. The 4RS-1 expander station solves both: a universal four-outlet module that works with any TrolMaster plug-in device module, staggering each outlet's startup by three seconds to minimize inrush current.

Each of the four outlets runs on its own 25A relay, and the unit requires a dedicated 120/240V power circuit rated up to 50A at 240VAC, with heavy-gauge terminals accepting wire up to #6 AWG.

Key Features & Benefits

• Individual 25A Relays — each of the four outlets has its own relay rated for 25 amps.
• Staggered 3-Second Delay — outlets activate in sequence to reduce high start-up surges.
• Works With Any Plug-In Module — triggered by any TrolMaster device module already installed.
• Heavy-Gauge Terminals — accepts wire up to #6 AWG for a secure power connection.

Who Should Use the 4RS-1 Expander Station

Growers who need to safely power more than one large device, such as multiple fans or pumps, from a single TrolMaster device module without overloading one outlet will find the 4RS-1 suited to that need.

About TrolMaster

TrolMaster, operated by ThinkGrow Agricultural Technology in Sacramento, California, builds its Hydro-X environmental-control platform around expandable device modules like the 4RS-1, letting growers scale outlet capacity without replacing the main controller.

Frequently Asked Questions

How many devices can the 4RS-1 control?

Up to four devices, each through its own 25A relay outlet. A single trigger cable connects the 4RS-1 to an existing device module to activate all four together.

Why is there a delay between outlets?

A 3-second delay between each outlet reduces high start-up inrush current when multiple devices power on together. Staggering the startup this way is what lets several large devices share one triggering module safely.

What size power circuit does the 4RS-1 need?

A dedicated 120 or 240 volt circuit rated up to 50 amps at 240VAC. Heavy-gauge terminals on the unit accept wire up to #6 AWG for that connection.

Is the 4RS-1 U.L. or E.T.L listed?

No, the plug on this unit is not U.L. or E.T.L listed, so it should be installed according to local electrical code. It's rated for working temperatures of 41-140°F and 0-99% non-condensing humidity.