Specialty Concepts SCT - Manual

S
PECIALTY
C
ONCEPTS
T
IMER
(
SCT
)
Photovoltaic Load Timer
Installation and Operation Manual
S PECIALTY C ONCEPTS, I NC.
8954 Mason Ave.
Chatsworth, CA 91311 USA
MODELS COVERED: SCT-8 Copyright 10/1996 Specialty Concepts, Inc.
G E N E R A L D E S C R I P T I O N
The Specialty Concepts Timer (SCT) is a small, low-cost DC timer for the control of outdoor
lights, pumps or other photovoltaic powered DC loads. This timer is designed to sense
darkness at the PV array or via a photo sensor accessory, and then to automatically turn on
lights or other loads. The loads are then allowed to run for an adjustable period of time for up
to 15 hours, or until sunrise, whichever occurs first. The SCT operates in 12 or 24 volt DC
systems and is rated for 8 amps. It is housed in an anodized aluminum chassis and
encapsulated in a hard epoxy resin. The terminal block accepts up to 12 gauge wire or a
spade connector. The SCT is designed to work with the photo sensor accessory or in
conjunction with a photovoltaic system that has a blocking diode located between the battery
and the array. In many systems, a blocking diode is already included within the charge
controller.
A P P L I C A T I O N S
The SCT is designed as a system component for small to intermediate lighting applications
that require more light than provided by a walkway light. The 8 amp capacity allows one SCT
to control several small (16-30 watt) lights from a centrally located array and battery, or larger
lights can be individually controlled. This allows each lighting system to be custom designed
using a main battery bank or several distributed batteries. The SCT can be used to control an
external relay for higher capacity, or to turn an inverter on for AC systems.
F E A T U R E S
LIGHT TIMER
•
8 amp capacity, 12 and 24 volt
•
Turns light on at sundown
•
Adjustable run time, up to 15 hours
•
Can be used as a day/night switch
•
Uses PV array for sundown detection
•
Photocell sensor assembly available
(accessory)
DESIGN FEATURES
•
Encapsulated for protection
•
100% solid state
•
Input noise suppression
•
Reverse polarity protection
•
Lightning protection