When you need to control larger equipment with higher amperage, or when you need to increase the number or size of the lights, fans, air conditioners or pumps in your growing area, the Sentinel PXM-1 or PXM-2 is your answer. 

These Power Expansion Modules have been designed to expand the capabilities of the Sentinel controllers and timers.

The Sentinel PXM Power Expansion Modules are pre-wired and ready to use right out of the box. Each gives you 2 electrical receptacles for connecting your garden equipment. They're housed in a high impact plastic enclosure for durability.

Install the PXM by connecting the pre-wired “trigger” cable into any controller or timer that is 120 volt. Locate a suitable circuit and plug in the pre-wired #14 AWG cable into the power outlet of your choice. Plug your devices that are to be controlled into the PXM and you are ready to go.

They'll handle large devices up to 15 amps. The PXM-1 has 120-volt receptacles and the PXM-2 has 240-volt receptacles. For example, the PXM-1 allows you to connect two (2) 600 watt HID lights, the PXM-2 allows you to connect two (2) 1000 watt HID lights.

Specifications:

PXM-1 - Main Power / amperage 15-amps @ 120-volt AC - Maximum HID wattage 1200 watts (on 120-volt)
PXM-2 - Main Power / amperage 15-amps @ 240-volt AC - Maximum HID wattage 2000 watts (on 240-volt)

More info (PDF format)