Elays, Power relays – SP Controls SmartPanel User Manual
Page 48
Page 44
SmartPanel Configuration and Installation Guide
www.spcontrols.com
© 2002-8 SP Controls, Inc. 930 Linden Ave. So. San Francisco CA 94080
R
ELAYS
In addition to controlling the
projector, the SmartPanel provides
configurable relays that can be used
to control other devices common to
small projector installations, such as
switchers, screens, and lights.
There are two sets of relays on the
back of the Panel, as shown in
Figure 18:
x
power relays, which open and
close according to the power
state of the Panel; and
x
selection relays, which open
and close according to the
current input selection.
Note: The SmartPanel relays are low voltage only. This applies for all settings and situations. All
of the relays on the board are rated at 500mA max current. Under no circumstances is high
voltage to come into any conduit or backbox that the Panel uses.
Note: No relay terminals are tied to any others. If you use multiple relays to control the same
device, you must wire the commons yourself.
Note: Factory relay settings are silk-screened onto the back of the Panel. If you change any of
the relay options, ignore this silk-screening.
Power Relays
The leftmost three relays (labeled 1 to 3) are power relays, which open or close according to
whether the Panel and projector are on.
The power relays are intended to automate equipment that can accept contract closure for
control. Examples of such devices are power controllers (for rack power), screens, lifts, and
lighting dimmers.
As shown in Figure 19, power relay settings can be configured with the Configuration Utility.
There are two configurable options for each power relay:
x
whether it closes when the system goes on or off, and
x
whether this closure is momentary or maintained.
The mutually exclusive ON or OFF checkboxes determine which power state a relay is
associated with. A power relay closes only when the Panel power changes to become the state it
is associated with.
RELAYS
PWR
ON
MAINT.
PWR
ON
MOM.
PWR
OFF
MOM.
1A
1B
3A
3B
2A
2B
4A
4B
6A
6B
5A
5B
7A
7B
SELECTION
(EXT. SWITCHER CTRL)
4
3
2
1
500mA MAX. CURRENT
Figure 18: Power relays (Panel rearview)