Specifications

ManualsBrandsAWG ManualsOtherLITE PACK FOR NSD LITE

07076r2 4/2007

LightSaver

LS-101 Daylighting

C o n t r o l l e r

Figure 3: LS-101 Field of view, sidelight application

When the primary source of daylight is a skylight (to p l i g h t i n g ) ,

t h e re are seve r al options for mounting the LS-101. The

re c ommended mounting lo c ations are shown in Figure 4.

I d e a l l y, the sensor is mounted on the South sidew a l l

looking North acro s s the light well.

It could also be mounted on the ceiling next to the

skylight, looking down at the ﬂo o r.

A skylight may pro d u c e 5000 fo o tca n d les or more. If the

sensor is mounted so that it looks up into the skylight, the

daylight will exceed the maximum OFF setpoint of 1275fc

which is too low for this orientation.

Figure 4: LS-101 Skylight application

Figure 1: LS-101

SPECIFICATIONS

Light Sensor range . . . . . . . . . . . . 1 to 1400 fo o tca n d le s

ON Setpoint range . . . . . . . . . . . . . . 1 to 850 fo o tca n d le s

A u t omatic Deadband. . . . . . . . . . . 25%, 50%, 75%, 100%

S t atus Indica tor . . . . . . . . . . . Multi-function green LED

Power re q u i r ements . . . . . . . . . . 12/24 VDC, min 10 mA

To t al power re q u i rements are dete r m i n e d

by the co n t r o l led dev i ce .

Output signal . . . . . . . . . . . . . . . 12/24 VDC, max 120 mA

L o c a t i o n . . . . . . . . . . . S u i ta b l e for dry, interior lo c ations

E n v i ronment . . . . . . . . . 50° to 104° F, le s s than 90% rh

Dimensions . . . . . . . . . . . . . 2 . 4 ” diameter x 0.7” depth

(61mm x 17mm)

DESCRIPTION

The Watt Stopper LS-101 is an interior photosensor that

a u to m a t i c a l l y turns a zone of lights ON and OFF based on

daylight levels. It is a low vo l t age dev i c e intended to

signal a power pack or relay panel.

The LS-101 is designed

to re q u i re minimal

a d j u s tment at sta r t u p .

For more adva n ce d

a p p l i cations, an

o n b o a rd display and

t w o pushbuttons allow

for adjustments, if

needed. The display is

hidden under a re m ova b le

cove r. To ass i st with adjust m e n t ,

the LS-101 displays the current light

level re a d i n g .

Figure 2: Cover removed

The LS-101 is designed to be either ceiling- or wall-

m o u n t ed. It has a wide range light sensor ca p a b l e of

measuring from 1 to 1400 fo o tca n d le s .

SELECTING A LOCATION

The LS-101 co n t rols lights in areas that re c e i ve enough

daylight so that the electric lights can be re d u c ed or

s w i tched OFF. It is important to select a lo cation for the

L S -101 where the daylight is re p r e s e n t a t i ve of the

daylight throughout the co n t ro l l ed zone. Note the path of

s h a d o ws. Daylighting co n t rol will be pro b lematic if part of

a co n t r o l led zone is in shadows while another part has

p lentiful daylight.

When the primary source of daylight is a window

(sidelighting), the LS-101 is typica l ly ceiling mounte d

within the daylit zone which ex t ends 12 feet or le ss in

f rom the window. A good lo c ation is often between the

w i n d ow and the ﬁrst row of ﬁx t u res. Figure 3 shows a

t y p i c al mounting lo c ation for a sidelit applica t i o n .

Summary of content (6 pages)

PAGE 1
LightSaver® LS-101 Daylighting Controller SPECIFICATIONS Light Sensor range . . . . . . . . . . . . 1 to 1400 fo o tcandles ON Setpoint range . . . . . . . . . . . . . . 1 to 850 fo o tcandles Automatic Deadband. . . . . . . . . . . 25%, 50%, 75%, 100% Status Indica tor . . . . . . . . . . . Multi-function green LED Power requirements . . . . . . . . . . 12/24 VDC, min 10 mA Total power requirements are dete r m i n e d by the controlled device. Output signal . . . . . . . . . . . . . . .
PAGE 2
Closed Loop or Open Loop Invert output The LS-101 can be used as a closed loop device or as an open loop device. When the LS-101 can view both daylight and light from the co n t rolled electric lights, it is working as a closed loop device. When the LS-101 can only see daylight, it is working as an open loop dev i ce. This feature is used to control devices that require a +24 VDC signal when the lights should be turned OFF and 0 VDC when the lights should be turned ON.
PAGE 3
For measuring light, the rotation of the light sensor is not critical, but it may simplify setup and adjustment. Rotate the LS-101 so you can approach it from the side with the status LED. In a typical ceiling application, rotate the LS-101 so that the light sensor is nearest the window. In a wall mount application, it should be rotated so that the light sensor is near the top. Figure 10: LVS-1 Override switch wiring Using with the BZ-100 for Hold OFF while unoccupied .
PAGE 4
QUICK START TO ACTIVATING THE LS-101 FOR BASIC OPERATION 1. Comple te all wiring and turn on the power to the LS-101, all acce ssories and loads. 2. Verify that the display shows LS101 #.# (the current software version). 3. Press the MENU button twice and verify that the display shows CTRL ON or CTRL OFF. 4. Press the SELECT button seve ral times to verify that the load switches ON and OFF. 5. Press the MENU button once. Verify that the display shows ON 7.5. 6.
PAGE 5
Footcandles (FC) Time Delay (TIME) This is normally the first screen visible when any button is pressed. It displays the current light sensor reading, which updates once a second. This adjustment determines how long the light level must remain above the OFF setpoint before the lights turn OFF. Any object that changes the amount of light that reflects into the light sensor will change the readings. Whenever possible, lean away or back down from the LS-101 to see if the light level readings increase.
PAGE 6
LED STATUS INDICATOR Off . . . . . . . . . . . . . . . .The lights are commanded ON by the LS-1 0 1 On solid green . . . . . .The lights are commanded OFF by the LS-101. Flashing green, once per second The LS-101 is in Test Mode Flashing green, once every four seconds Automatic control of the lighting is being overridden either by the wall switch or from the LS-101’s Control menu.