Lighting Controls Blue Box LT Series Installation, Operation & Maintenance Manual page 106

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GROUPS FAq
: Q What does a "maintain" type group do?
: A When the MAINTAIN group is turned ON, it turns
its relays ON . When it is turned OFF, it turns its relays
OFF .
: Q What does a "momentary" type group do?
: A Momentary groups are usually used with switch but-
tons . They can be ON, OFF or mixed .
: Q What is the difference between "maintain" type
groups and "momentary" type groups?
: A A MAINTAIN group can be turned ON and OFF .
Once it is turned ON, it stays on until turned OFF .
When it is turned OFF, it stays OFF until turned ON .
A MOMENTARY ON group can only turn its relays
ON, never OFF . A MOMENTARY OFF group will al-
ways turns its relays OFF . A MOMENTARY MIXED
group turns some relays ON and some relays OFF .
: Q Which type of group is most commonly used for
schedules and why?
: A Usually schedules operate "maintain" type groups .
This is because schedules are used to turn lights on
and have them stay on for a period of time, and then
turn them off . Only maintain groups can be turned
on and off .
: Q When would you use a "momentary" type group
with a schedule?
: A In those rare instances when a schedule needs to
just turn lights on (without a corresponding off com-
mand) or off (without a corresponding on command) .
For example, if you wanted the lights turned off by a
schedule at 8pm every day, but didn't want any on
time, you would create a schedule that activates a
Momentary OFF group .
: Q What does a MAINTAIN + TIMER group do?
: A When it is turned ON, it turns its relays ON . When
it is turned OFF, it turns off its relays AND enables a
timer on each relay . If any of the relays in timer mode
are flipped on with a switch, etc . , they will automati-
cally turn back off again after the timer has expired .
THE BLUE BOX LT FREQUENTLY ASKED QUESTIONS
: Q How do you tell if a relay has a timer and what timer
value is on it?
: A If you check the relay properties screen for that relay,
it will say REGULAR TIMER MODE: followed by a
number, e . g . TIMER 00:20:00 H/M/S .
: Q How do you tell if a relay timer is active?
: A If the relay is on, the manual override screen will show
the normal ON square symbol with an additional lit-
tle "leg" on the bottom left corner, like this:
Relay ON with no TIMER:
Relay ON in TIMER mode:
: Q What does a MAINTAIN + BLINK group do?
: A It is identical to a MAINTAIN + TIMER group, with
the only addition being that when you turn a MAIN-
TAIN + BLINK group OFF, the lights will blink or flick,
and then wait for a specified amount of time before
the relay turns off . This time period is called the "Blink
time out . " This time period is set in the MAINTAIN +
BLINK group under "SET TIMER" .
: Q How do you take a relay out of timer mode?
: A Find out what MAINTAIN + TIMER or MAINTAIN
+ BLINK group that relay is in, and turn that group
ON .
: Q How can you tell if a relay has a "Blink Timer"?
: A If you check the relay properties screen for that relay,
it will say BLINK One or BLINK Two: followed by a
number, e . g . BLINK One: 20:00 M/S .
: Q How can you tell if a relay is in a blink warning time-
out?
: A The manual override screen will show the relay as
being on with TWO little legs on the bottom corners,
as shown here:
Relay on with no BLINK or TIMER:
Relay in final BLINK Warning Timer:
: Q What is the purpose of the "Blink time OUT" .
: A It gives the occupants of the area a warning that the
lights are about to turn off . They can extend the time