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High Priority Inputs (HPI)
The control unit located at the skylight includes inputs to allow skylight control
from other devices such as thermostats, home automation systems, security
systems, smoke evacuation systems, etc. These inputs are called High Priority
Inputs (HPI). There is an input for “Open” and an input for “Close”. The inputs
are designed to be controlled with low voltage dry contacts (relay).
Note: See main wiring diagram on page 7 for proper hook-up.
Input Function - HPI Close
1. When connected by a continuous contact closure, the skylight will
fully close. All other input devices (except for HPI Open) will be
“locked-out” until the contact closure is re-opened
2. When connected by momentary contact closure, the skylight will
close. There will be a minimum delay of 3 seconds before system
will react.
•
A contact closure of 3 seconds is needed to activate a “close”
command.
Input Function -
HPI Open
1. When connected by a continuous contact closure, the skylight will
fully open. All other input devices will be “locked-out” until the
contact closure is re-opened. There will be a minimum delay of 3
seconds before system will react.
2. When connected by momentary contact closure, the skylight will
open. There will be a minimum delay of 3 seconds before system
will react.
•
A contact closure of 3 seconds is needed to activate an “open”
command.
Intermediate Open position
The skylight can be stopped in an intermediate position with a ½
second momentary contact closure across the contacts for the
direction opposite the skylight travel. For instance, if the skylight is
opening, a momentary contact closure of ½ second across the HPI
“Close” contacts will stop the skylight.
Wiring
18-2 twisted pair is recommended up to 150 feet maximum.
Control Switch Options
•
Some home automation companies offer control switches that can
be used to control the Sentry II HS control unit through the HPI
inputs. Consult the Truth Hardware web site for more information.
(www.truth.com/technicalsupport)
