VIMAR 20850 Passive Infrared Motion Detector Owner’s Manual

VIMAR 20850 Passive Infrared Motion Detector

Product Information

The motion detector is a device with the model numbers 20850, 19850, 16850, and 14850. It is designed to detect motion within its range of action. When motion is detected and validated by an internal filter, a presence message is sent over the KNX bus and the green LED lights up. The device also includes a twilight sensor that can control the lights based on daylight brightness levels.

Functionality

• The motion detector detects motion within its range of action.
• A presence message is sent over the KNX bus and the green LED lights up when the movement is validated by an internal filter and meets the set brightness threshold.
• The green LED does not light up for every detected movement, but only when a presence message is sent.
• The device can activate a movement event from an external source or any KNX device.
• The twilight sensor can turn the lights on or off based on daylight brightness levels.
• Two types of brightness thresholds (upper and lower) can be set, and various operations can be performed according to the current level.
• Individual or cyclical On/Off messages can be sent, and message sending can be postponed to validate the effective level of the light sensor.

Behaviour after Bus On/Off

When the bus is off, data is not saved. When the bus is on, motion detection is enabled after 30 seconds, allowing the IR sensor to stabilize.

Behaviour after Reset

After a reset, the device behaves the same as when the bus is turned on.

Product Usage Instructions

To use the motion detector:

1. Install the motion detector in the desired location within its range of action.
2. Connect the motion detector to the KNX bus.
3. Ensure that the device is powered on and connected properly.
4. Adjust the brightness thresholds for the green LED and the twilight sensor according to your preferences.
5. Configure any external triggers or KNX devices that should activate the motion event.
6. Test the motion detection by moving within the sensor’s range of action and observing the green LED lighting up.
7. If desired, adjust the twilight sensor settings to control the lights based on daylight brightness levels.
   Note: Refer to the product manual for more detailed instructions on advanced features such as MASTERSLAVE operation with multiple motion detectors.

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

KNX objects: motion detector in detail.
Motion detector communication objects

1

| Motion 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

|  |

2

|

Motion 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 MASTER PIR, which via the “Command on movement” object ef- 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

|  |

Twilight function
“Twilight function” parameters
For automatic power on/off according to daylight brightness levels.

[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]

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.

ETS reference parameters

General
You can choose to enable a different device function. The two functions (Motion detector and Twilight sensor) must not be enabled together.

General parameters

[Default value]
Enable motion detector| [Enable]| To turn on a light when motion is detected
Disable

Enable

twilight function

| Enable| To turn on a light when day- light brightness falls below a certain value
[Disable]

Motion detector
“Motion detector” parameters
To turn on the light when a moving person is detected.

[Default value]
Motion detector independent from light| Yes – No| If “Yes” the daylight bright- ness threshold is ignored (see “Brightness threshold”)
[No]

Motion detector below brightness threshold

| 10%…100%| If the motion detector de- pends on the light: defines the threshold below which motion is to be detected (0%= operates only in the dark)
  [50%]

Send message

| on movement|

How to send

a presence message

cyclically
[in the case of move- ment]

Minimum wait before sending new message

|

1s…1 h

| If send message “on movement” is selected, this is the delay time before sending the “On” message

on detecting movement after the sensor has sent a move- ment end “Off” message

  [5 s]

Cyclic period

| 1s…1 h| If send message “cyclically” is selected
[1 m]

Movement timeout

| 1s…1 h| Time for which the sensor must not detect any type of movement if one has just been detected
[30 s]
Wait after move- ment finish| Disable|

Sensor off time

Enable
[Disable]

Time wait after movement finish

|

1s…5 m

| If “Wait after movement finish” is enabled, this is the time the device waits after detecting the end of move- ment and before sending an “Off” (if the corresponding parameter is enabled)
  [10 s]
Send OFF mes- sage on movement finish| Yes|
---|---|---
No
[Yes]
Object “forced disable”| Disable| To bring up an object to be used for disabling the mo- tion detector via the bus
Enable
[Disable]

Disable motion detector with

| Off message| If the

“forced disable” object is enabled.

It is possible to set the message to force sensor deactivation

On message
[On message]

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