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Operating and mounting instruction 

B.E.G.

occupancy detector Indoor 180-SC

Thank you for purchasing the presence detector.

You have opted for a quality product from the 

B.E.G.

 

range and for one which has been manufactured, 

tested, packaged and despatched with the utmost 

care.

Please read the information contained in these  

directions before commencing assembly. 

We reserve the right to make any technical 

adjustments which are in the interests of product - 

improvement.

Caution: have all work involving the 230 V mains 

supply carried out by a qualified electrician! Before 

starting disconnect the mains!

type

Part-no.

Indoor 180-SC, fully fitted,  

pure white

92650

Sensorinsert for Indoor 180-SC

92668

Covering IP20, pure white 

92630

Covering IP20, traffic white

92631

Covering IP20, cream

92632

Covering IP20, silver

92633

Covering IP20, anthracite

92634

Covering IP54, pure white

92139

1. Function

With the 

LUXOMAT

®

 Indoor 180 you acquired a 

B.E.G.

-occupancy detector for flush mounting in 

indoor and outdoor applications.

LUXOMAT

®

 Indoor 180-SC was specifically 

conceived for use with automatic stairway lighting 

devices (e.g., HAGER 45401).

The 

LUXOMAT

®

 Indoor 180-SC is used to replace 

standard light-contact push buttons. You can do this 

in both 3-wire as well as with 4-wire circuits.

It is not necessary to rewire.

LUXOMAT

®

 Indoor 180-SC needs only two wires and 

takes the power it needs to operate from the stairwell 

lighting-timer switch-off-device (ca. 4 mA/230 VAC).

Detecting movement

The 

LUXOMAT

®

 Indoor 180-SC’s motion detection 

corresponds to the functioning of typical motion 

sensors, i.e., thermal radiation of persons and 

other heat sources (e.g. animals) moving within the 

sensing area are measured and the ambient lumi-

nosity is compared with a twilight threshold value. 

Ambient luminosity

Set the twilight threshold value on the “LUX” rotary 

control. The LED (behind the Fresnel lens) flashes 

quickly if the ambient luminosity is set higher than 

the adjusted twilight threshold. The LED is extin-

guished as soon as the ambient luminosity is less 

than the adjusted twilight threshold.

Triggering the stairwell lighting-timer

If the ambient luminosity sinks below the twilight 

threshold value and a movement is detected, the 

LUXOMAT

®

 Indoor 180-SC closes the supply feed 

through a high-performance FET for ca. 100 msec. 

(this corresponds to briefly pushing the button).

This short impulse actuates the stairwell lighting-

timer and the connected lighting is switched on 

for the switch-off delay time set on the stairwell 

lighting-timer.

Post-triggering the stairwell lighting-timer

A new impulse can be triggered only after ca. 

10 seconds. This delay is necessary to ensure the 

LUXOMAT

®

 

Indoor 180-SC has sufficient power.

As it is possible to connect several detectors (up to 

ten detectors) in parallel to one stairwell lighting-

timer, each detector is capable of detecting the 

impulse from one connected detector and, if 

applicable, to generate a new impulse delayed 

correspondingly.

Suppressing the twilight threshold-value query

Each impulse leads to the stairwell lighting-timer 

being switched on or post-triggered. That means 

all the detectors in the stairwell area “see” the 

switched-on connected lighting so that the evalua-

tion of the twilight threshold value becomes difficult 

or even impossible. Therefore, upon detection 

of an impulse, all detectors suppress the twilight 

threshold-value query for the time set on the “MIN” 

rotary control.

Every detected motion leads to a post-triggering 

impulse, independent of the ambient luminosity.

We recommend setting the time set on the “MIN” 

rotary control either the same or a bit higher 

than the switch-off delay time set on the stairway 

lighting-timer.

The LED displays as follows during the suppression 

phase of the current ambient luminosity:

--> bright:  the LED flashes very quickly:

--> dark:   LED off

Detection area

The 

LUXOMAT

®

 Indoor 180-SC is equipped with a 

hemispherical Fresnel lens, which produces a semi-

circular sensing area (horizontal 180°, vertical ca. 

60°) in wall installations. The size of the monitored 

area is 8m from the front and side for the recom-

mended installation height of 1.10 - 2.20 mduring 

movements that are crossways to the line of the lens 

segments.

The number of parallel connected 

LUXOMAT

®

 

Indoor 180-SC’s

Do not connect more than ten 

LUXOMAT

®

 Indoor 

180-SC’s in parallel in order to prevent possible 

spurious triggering. 

The max. possible quantity is also restricted 

through the type of stairway lighting-timer used:

Caution

 – if not enough power can be drawn from 

the stairway lighting-timer, the supply voltage for 

the motion sensors sinks and malfunctions occur 

in the motion sensor. Furthermore, the stairway 

lighting-timer switch might be permanently 

switched on.

Wiring/connection

It is necessary to pay attention to the polarity of the 

two wires.

Make sure you observe the following points prior to 

installation:

•  The 

LUXOMAT

®

 Indoor 180-SC is intended for 

installation in standard size-I inlet-sockets. We 

recommend installing at a height of 1.10 to 2.20 m.

•  Ensure the view is clear as the infrared rays 

cannot penetrate through solid objects.

•  If you do not want movement underneath the 

sensor to be detected, you can clip the enclosed 

covering cap (A) onto the mask cover (B)  

*If the sensor covers zones that should not be 

monitored, the corresponding lens segments 

must be masked off, for instance with transparent 

tape, which can be determined by testing.

  Frontal approach

Motion sensors are most sensitive if the move-

ment is crossways to the line of the lens seg-

ments. When being approached from the front 

the sensitivity and thus the effective range is 

significantly reduced.

3. Installation 

The detector can be installed in conventional instal-

lation sockets. Installation should be made to a 

wall with a height of 1.10 to 2.20 m.
For the combination with switches of leading 

manufacturers the enclosed additional blinds can 

be used.

Mounting diagram

• Clear mains’ voltage! 

 

•  Connect sensor part

 (A) 

according to the regula-

tions and as shown in the wiring diagrams (pt. 5).

•  Depending upon the concealed housing, fasten 

at the top and the bottom or left and right using 

the enclosed screws

 (B)

•  Additionally to the horizontal detection plane the 

Indoor 180 has a vertical detection plane which 

detects also movements underneath the motion-

detector. In order to prevent detection within the 

vertical range of coverage, apply cover 

(C)

.

•  Next introduce and fasten the blinds 

(D)

 and the 

covering-cap 

(E)

.

•  Switch on mains‘ voltage. The 

LUXOMAT

®

 

Indoor 180 is ready for use after having com-

pleted a 

self-checking cycle of about 60 seconds

LUXOMAT

®

a

C

D

E

F

B

GB

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