When you need to control larger equipment with higher amperage,
the PXM is the answer. Power Expansion Modules increase the
number OR size of the lights, fans, air conditioners and pumps in
your growing area that can be “automated”. The PXMs have been
designed to expand the capabilities of the Sentinel controllers and
timers. You install the PXM by connecting the pre-wired “trigger”
cable into any controller or timer that is 120 volt. Then locate a suit-
able circuit and plug in the pre-wired #14 AWG cable into the
power outlet of your choice. Plug the devices that are to be
controlled into the PXM and you are ready to go.
* The PXMs come in a 120 volt (PXM-1) and a 240 volt (PXM-2)
ersion. Each has 2 receptacles to connect to.
* PXMs are able to control up to 15-amps of power.
* The PXMs are pre-wired and ready to use right out of the box,
NO WIRING REQUIRED.
The PXMs are housed in a
high impact plastic enclosure.
The PXMs are completely
“pre-wired” and requires only
connecting the devices to the
unit, and then to plug the
power cable into the power
outlet of your choice.
TABLE OF CONTENTS
A quick look at the PXMs
Installation of the PXMs
PXMs electrical connections
Large load (AC-Fans) example
HID lighting example
Troubleshooting & Specs
Introduction
WARNING:
Installation must be done in accordance with state and
local electrical codes.
Troubleshooting
Problem: The controller is turning On the relay and green LEDs
but there is not power coming from the receptacles.
Verify the circuit breaker on the bottom of the unit is turned ON. Check
the main power source that the PXM is connected to.
Problem: The green LEDs and relays do not turn ON.
Check the timeclock or controller that the trigger power supply is
connected to. The trigger cable provides a 120-volt “signal” to the PXM
that turns ON the relays. Try plugging the trigger power supply into a
known 120-volt power source. If it works, then the problem is with the
timeclock or controller you are using to turn the PXM ON.
Problem: The circuit breaker for the main power keeps shutting
OFF.
The circuit breaker is protecting the circuit from overloading. The am-
perage of the devices connected may be too much for the PXM. It is
also possible that one or more of the ballasts have failed (shorted out) or
the device connected to the PXM is having a problem. Try unplugging
each ballast one at a time to determine which ballast has a problem.
Verify the device connected is working properly by connecting it
directly to a power source. Verify the total amperage connected to the
PXM does not exceed 15-amps.
Problem: The green LEDs and relay are OFF but the receptacles
on the PXM still have power.
It is possible that something is wrong with the heavy-duty relays. If the
trigger cable is unplugged and the receptacles still have power, take the
unit out of operation and contact the factory.
Problem: The green LEDs are ON but I do not hear the relays
turning ON. The device connected to the PXM does not turn ON.
It is possible that something is wrong with the heavy-duty relays. If the
green LEDs are ON, and the receptacles do not have power after verify-
ing the main power supply is working, contact the factory.
Problem: I want to connect a second PXM to be activated at the
same time.
The interconnect cable allows up to (2) PXMs to be connected to a sin-
gle power supply. Connect the cable from 1 PXM to another PXM.
Some of the more common questions and problems are listed here.
