The SRKNX is a hidden 360º radiofrequency movement detector for installation above false or technical ceilings.
It is also possible to install it in brick walls or plasterboards. This device is oriented to substitute the ceiling 360º
passive detectors, clearly overcoming their performances.
It is based on radio frequency technology, that allows it to pass through any kind of surface, except the metallic
ones. Its hidden installation guarantees safety against non desired intrusions or vandalism. Moreover, it
combines esthetics and automation in a single installation. It allows a wide and easy parameterization, being
suitable for lighting functions, as well as people detection and intruder control.
V2.1
ENER AL DESC RIPT ION
• Detects movement through solid, non-metallic objects (brick, wood, etc).
• Detects minimum movements.
• Hidden installation in false ceilings or walls.
• Easy to install, adds elegance to the lighting design
• It is immune to vandalism.
• Automatic reset after detection.
• Adjustable timer from pulse to 17min.
• Adjustable sensitivity up to 12m.
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ROGRAMMING MANUAL
SRKNX -
2 T
V2.1
ECH NICA L IN FORM ATIO N
• Supply - 29 Vdc from auxiliary power supply or from KNX BUS.
• Consumption - (depends on source):
o Auxiliary Power Supply 12-30Vdc (Recommended)
35 mA from auxiliary power supply.
1mA from KNX BUS
o KNX BUS (Optional)
35mA from KNX BUS
• Connections - Screw terminal (four poles terminal block).
• Type of protection - IP20. Extra low security voltage SELV, 24V direct current.
• Temperature range - Running: -10ºC a 55ºC / Storage: -30ºC a 60ºC / Transport: -30ºC a 60ºC.
• Size / weight - 25x45x65mm. / 115g.
• Mount - over false ceilings or hidden in walls or bricks.
• Standardization - for KNX.
• Detection range: 12 x 6 m (at 2.5 height).
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C R W T U
ROGRAMMING MANUAL
SRKNX -
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Number of communication objects: 11.
Number of assignments: 33.
Object Name / Function Length DPT
V2.1
ROGR AMM ING
3.1 C
0 Channel 1 - Detection event: Bit 1 bit 1.001 ● ● ●
10 Channel 2 - Force remote detection 1 bit 1.001 ● ●
11 Channel 2 - Remaining time (seconds) 2 byte raw ● ● ●
3.2 O
Object 0: Channel 1 - Detection event: Bit
Channel 1 detection communication object in 1 bit format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
BJE C T S D ESCRIPTION
Object 1: Channel 1 - Detection event: Byte
Channel 1 detection communication object in 1 byte format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
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SRKNX -
V2.1
Object 2: Channel 1 - Detection event: 2 Bytes
Channel 1 detection communication object in 2 bytes format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
Object 3: Channel 1 - Enable / disable channel
1 = Motion detection enabled.
0 = Motion detection disabled (stand-by mode).
Object 4: Channel 1 - Force remote detection
1 = Forces a remote detection.
0 = Forces a remote end of detection.
Used for Master-Slave mode. It allows to emulate a detection without any motion. By sending 1, the detector is
activated remotely performing the start detection event. Slave sensors emulate Master detections: link bit
detection event of the slave with
Object 5: Channel 1 - Remaining time (seconds)
0 – 65535 = Remaining time in seconds for end of detection event.
The remaining time of the countdown after motion detection can be read by this communication object.
Object 6: Channel 2 - Detection event: Bit
Channel 2 detection communication object in 1 bit format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
Object 7: Channel 2 - Detection event: Byte
Channel 2 detection communication object in 1 byte format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
Object 8: Channel 2 - Detection event: 2 Bytes
Channel 2 detection communication object in 2 bytes format. When a motion is detected and the sensor is
triggered, it sends the correspondent parameter On. When the countdown finishes (switch-off delay) it sends
the correspondent parameter Off.
Object 9: Channel 2 - Enable / disable channel
1 = Motion detection enabled.
0 = Motion detection disabled (stand-by mode).
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SRKNX -
Object 10: Channel 2 - Force remote detection
1 = Forces a remote detection.
0 = Forces a remote end of detection.
Used for Master-Slave mode. It allows to emulate a detection without any motion. By sending 1, the detector is
activated remotely performing the start detection event. Slave sensors emulate Master detections: link bit
detection event of the slave with
Object 11: Channel 2 - Remaining time (seconds)
0 – 65535 = Remaining time in seconds for end of detection event. The remaining time of the countdown after
motion detection can be read by this communication object.
V2.1
3.3 P
3.3.1 G
ARA M E T ERS
ENERAL PARAMETERS
General parameters allow to set the detection characteristics of the sensor and are described as follows:
BUSing Address
Values From 0 to 255
Description Not used
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SRKNX -
Advanced: smoothing
V2.1
Values From 0 to 10
Is the value that represents the persistence of the detected movement. This value can range
between 0 and 10. The greater value, the more continuous the movement must be for activation
to occur. This value must be lesser than or equal to half the Sampling time parameter.
Description
Recommended values depending on usage:
− Movement detection (example: activate lighting): 2.
− Intrusion detection: 8.
Sensitivity
Values From 0 to 100
This is the sensitivity percentage value with which the SRBUS detects movements, i.e., it increases
or decreases the detection area. This value can range between 0 and 100%, where 100% is the
maximum sensitivity.
It is not recommended to enter values over 80%, which could make the SRBUS extremely sensitive
Description
to vibrations (in the zone installed) whatever their origin may be.
Recommended values depending on usage:
− Movement detection (example: activate lighting): 40-60% (lower value for smaller rooms).
− Intruder: 20%.
Advanced: sampling time
Values From 0 to 255
This value ranges between 0 and 255, but it is not recommended to be over 64. It represents the
number of samplings taken to evaluate a detection. The greater the value, the slower the device
Description
Advanced: saturation
Values From 0 to 100
Description
response (it is measured in microcontroller cycles, not seconds).
Recommended values depending on usage:
− Movement detection (example: activate lighting): 16.
− Intrusion detection: 64
Is the value that represents the level of movement with which the device is activated,
independently of the Sampling time and Smoothing. If it is not used, it must be set to 100%.
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