Vimar 19850 Manual

Vimar Bevægelsesdetektor 19850

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161

BUILDING AUTOMATIONS

Motion detector

20850, 19850, 16850, 14850

Passive infrared motion detector, KNX standard, grey – 2 modules.

Functionality

This device detects motion within the sensor's range of action.

When the movement has been validated by an internal filter, a

"presence message" is sent over the KNX bus and the green

LED lights up. This is done according to the set brightness

threshold. Note that the green LED does not light up every time

a movement is detected, but only when a "presence message"

is sent.

The device is capable of activating a movement event from an

external source or from any KNX device.

A twilight sensor is also present which causes the lights to be

turned on or off according to daylight brightness levels. It is

possible to set two types of threshold (upper and lower) and to

perform various operations according to the current level.

These actions allow individual or cyclical On/Off messages to

be sent. It is also possible to postpone message sending to

validate the effective level of the light sensor. For MASTER-

SLAVE operation with multiple motion detectors, refer to

the explanation of KNX object no. 2 "External trigger".

Behaviour after bus on/off

Bus off: data are not saved.

Bus on: motion detection is enabled after 30 seconds,

the time necessary for the IR sensor to stabilise.

Behaviour after reset

As for bus on.

Communication objects

List of existing communication objects

20850 19850 16850 14850

Communication objects

KNX objects: motion detector in detail.

Motion detector communication objects

Number ETS name Function Description Length Flag 1

C R W T U

0Motion

detector Movement switch (if the "Motion Detector" parameter is enabled) - a bit that goes to "1" if a

movement is detected 1 bit X X

1Motion

detector Forced Disabled

(if the "Motion Detector" parameter is enabled) to deactivate the motion

detector via the bus so that the device does NOT send multiple messages

on detecting a moving body

1 bit X X

2Motion

detector External trigger

(if the "Motion Detector" parameter is enabled) if there are multiple PIRs

set as "Motion detector" controlling the same light, choose one as MAS-

TER and associate its "Command on movement" object with the "Trigger"

objects of the other SLAVE PIRs in the same group as the relay to be con-

trolled (so for the SLAVE PIRs the "Command on movement" object will

be unused). This way each SLAVE PIR will be able to reset the time count

of the PIR, which via the "Command on movement" object efMASTER -

fectively activates/deactivate the light relay of the same group. For exam-

ple, in a long corridor this ensures that the light does not go out during the

time it takes to walk from the detection zone of one PIR to that of another

1 bit X X

4 Twilight Switch if the "Twilight" parameter is enabled: the light turns on/off according to

daylight brightness levels 1 bit X X

5 Twilight Forced Disabled

(if the "Twilight" parameter is enabled) to deactivate the twilight sensor via

the bus so that the device does not send multiple messages on reaching

the set daylight brightness threshold

1 bit X X

C R W T = Communication; = Read; = Write; = Transmission; = Enable updateU

Motion detector: communication objects

163

BUILDING AUTOMATIONS

Motion detector: communication objects

ETS text Available values Comment

[Default value]

Action at lower

threshold

Nothing The PIR operates with a

lower and upper threshold;

this parameter defines the

behaviour below the lower

threshold

Off message

On cyclic message

Off cyclic message

[On message]

Action at upper

threshold

Nothing The PIR operates with a

lower and upper threshold;

this parameter defines the

behaviour below the upper

threshold

On message

On cyclic message

Off cyclic message

[Off message]

Cyclic period

1 s...1 h If a cyclic action is selected,

otherwise it is ignored

[1 m]

Object "Forced

disable"

Disable To disable twilight sensor via

the bus

Enable

[Disable]

Disable twilight

function with

On message If "forced disable" object is

enabled. The message can

be set to force deactivation

of the sensor

Off message

[On message]

Lower threshold

10%...100%

Lower threshold value

[20%]

Upper threshold

10%...100%

Upper threshold value

[90%]

Confirmation time 1 s...5 min. Time delay for action when

the daylight brightness value

exceeds the threshold value

[10 s]

"Twilight function" parameters

For automatic power on/off according to daylight brightness

levels.

"Twilight function" parameters

Detection performance: the data are approximate (the device is not a

LUX measuring instrument)

Twilight function

Note.

MASTER-SLAVE operation: if you want the light to be turned on

by the SLAVE PIRs and turned off by a PIR defined as MASTER,

in the relay group you must associate the "Command on

movement" object of the MASTER PIR and the "Trigger" objects

of the SLAVE PIRs (in which the "command on movement"

object will remain unused).

Motion detector: FAQs

(20850, 19850, 16850, 14850)

1. The sensor has turned the light on but it does not

detect me if I walk in front of it and after a while the light

goes off.

You need to set a lower value for the "Movement timeout"

parameter, which is the delay time before further ON com-

mands are sent if the sensor continues to detect movement

2. Once the sensor has turned oFF the light, it does not

turn it on even when someone walks directly in front of

it.

You need to set a lower value for the "Minimum wait before

sending new message" parameter, which is the delay time

before further ON commands are sent if the sensor contin-

ues to detect movement.

Produkt Specifikationer

Mærke:	Vimar
Kategori:	Bevægelsesdetektor
Model:	19850

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