Frequently Asked Questions

The below information are prepared for people who would like to know more about OS‑NET, a simpler and smarter wireless lighting control solution developed by IR‑TEC. Due to continuous product development and improvement, IR‑TEC reserves the right to add or alter the contents whenever necessary.

 
1. BASICS
OS‑NET is an abbreviation of Occupancy Sensing Network.
OS‑NET is a simpler and smarter wireless lighting control network solution developed by IR‑TEC.
OS‑NET is a wireless mesh network formed by a number of wirelessly linked OS‑NET Sensors to enable smart sensing control and networking capabilities among luminaires.
OS‑NET is created from a simple and cost effective concept, i.e. simultaneously deploy a wireless mesh network required for smart lighting control while installing the luminaires and lighting circuits with OS‑NET Sensors integrated. Through the process of grouping all OS‑NET devices, mainly the OS‑NET Sensors, an OS‑NET that can link up to 250 control groups thus created. Every OS‑NET Sensor is capable of sensing the presence of an occupant or vehicle and the ambient light level within its coverage, and then executing a variety of code-compliant smart controls to the connected lighting of the group in a unique control concept, i.e. individual sensing control, group activation.

"Individual sensing control, group activation" means that every grouped sensor will detect occupant's activities within its coverage. When any sensor detects the presence of occupant or vehicle, it not only controls the connected lighting as set, but also broadcasts the occupancy signal to other sensors of the group to activate the programmed controls to the connected lightings. If any grouped sensor detects occupancy before delay time elapses, the entire lighting group will remain controlled as occupied. After the area is vacated and delay time elapsed, each grouped sensor will individually control the connected lighting as set.
The OS‑NET enabled lighting refers to the luminaires that are integrated with OS‑NET Sensors and the lighting circuits that are electrically controlled by OS‑NET Sensors.
The OS‑NET control groups are fundamental pillars of an OS‑NET wireless mesh network. An OS‑NET control group can be a single independent OS‑NET enabled luminaire or a combination of multiple OS‑NET devices.
The OS‑NET solution can be applied in most areas of commercial, industrial, institutional, indoor and outdoor lighting environments. In simple words, wherever smart lighting control is required, either for retrofit projects or a new building, OS‑NET is capable of providing code-compliant, energy efficient smart controls with ease.
OS‑NET devices refer to the products that are built with OS‑NET wireless networking capability, including OS‑NET Sensors (ONS), OS‑NET Buttons (ONB), and OS‑NET Power Packs (ONP). In addition to the individual functionality, every OS‑NET device is also a node of mesh network that can transmit, receive, and/or forward the wireless communication commands within network.
The OS‑NET Sensors are fundamental devices that constitute an OS‑NET mesh network. In other words, OS‑NET is a wireless mesh network formed by a number of OS‑NET Sensors. Every ONS is a perfect combination of occupancy sensor, daylight sensor, lighting control processor, and wireless communicator.

An OS‑NET Sensor not only provides fully programmable smart control to the connected lighting by the sensing the local occupancy status and ambient light level, but also broadcasts the occupancy signal to other OS‑NET Sensors of the group to activate the respective controls as set through wireless network.

OS‑NET Sensors are available in two different form factors.
The Omni ONS is designed for flexible integration with a luminaire or mounting on a ceiling in a variety of options. Changeable lens options allow Omni ONS to be mounted from typical office ceiling to high bay applications with different coverage.
The Mini ONS is a low profile OS‑NET Sensor with a small flat lens specially designed for through-hole assembly with general office luminaire, such as Troffer or side-lit LED panel light.
The OS‑NET Button is an optional OS‑NET device designed to replace the existing wall switch, as a line voltage powered wireless control device to provide manual on/off and dimming control to the lighting group assigned. The main function of the ONB is to allow the user to control the local lighting as required.

*Dimming control is available only with 0/1‑10V dimmable luminaires.
The OS‑NET is a wireless sensor mesh network based on the ZigBee protocol, but with exclusive modification to achieve the level of flexibility, functionality and simplicity as required. ZigBee is an IEEE 802.15.4‑ based wireless communication protocol developed by ZigBee Alliance. For more details about ZigBee technology, please visit www.zigbee.org
The OS‑NET can provide top‑notch energy efficient, code‑compliant, sophisticated multi‑scheme controls without requiring extra sets of control wire networking to each luminaire and circuit. These include occupancy, vacancy, and daylight sensing based for on‑off switching, bi‑level StepDIM and continuous SmartDIM controls to the connected lighting in an individual or a group basis. With above capabilities, it can help lighting industry achieve smart controls with unsurpassed level of Flexibility, Functionality, and Simplicity.
 
  • To the OEM lighting manufacturer, OS‑NET can help you easily deliver a state‑of‑the‑art energy efficient lighting with wireless connectivity by simply integrating an OS‑NET Sensor with your luminaire.
     
  • To the lighting designer or specifier, OS‑NET can help you easily complete a lighting project featuring smart control by simply selecting the OS‑NET enabled luminaires or OS‑NET Sensors for lighting circuit control, and place them at proper positions according to the photometric characteristics of luminaires and the sensing coverage of sensors.
     
  • To the lighting installer, you can install a wireless network controlled lighting system in the same way as installing the conventional luminaires, sensors and switches. No extra wiring, no extra labeling on the complicated control wires, no more complicated commissioning. All you need is grouping the devices and setting controls via a remote.
Simply speaking, OS‑NET can save time, money and energy!

A wireless mesh network is synchronously built-up while installing the luminaires and circuits which is a basic job‑to‑do. No more extra sets of wiring diagram, control wires to each device, complicated wiring connections, and commissioning time typically required by conventional lighting control systems. So time is saved!

The OS‑NET does not require a centralized system control panel, routers, interfaces, power adaptors and proprietary management software which normally contribute to higher project cost. All you need are OS‑NET enabled luminaires and OS‑NET Sensors for local lighting circuit controls. So money is saved!

With OS‑NET, all lighting can be smartly controlled by a number of wirelessly linked sensors. Every sensor individually controls the connected lighting as programmed according to the occupancy status and ambient light level of the area under group activation control concept. So energy is saved!
A ZigBee network does not have a specified limit of devices as it depends on the network traffic of data and command communication. As the OS‑NET has been purposely designed with minimal data and command communication, an OS‑NET can effectively connect up to thousands of OS‑NET devices.
The communication range of OS‑NET devices can be affected by numerous factors, including the enclosure design of luminaire integrated, wall/partition material, building structure…etc. In general, the communication range of OS‑NET device can easily reach to 50-100 ft in typical indoor applications, and 150-300 ft at outdoor open space.
Ensuring independent operation of an OS‑NET network is important to prevent linking with another OS‑NET network in a neighboring area. Unwanted network linkage could result in cross-network group activation among the devices of two separate networks that are assigned with the same group numbers. To ensure independent operation of an OS‑NET network, always LOCK the network after all settings completed.
A PC‑based lighting control system, wired or wireless, is always more vulnerable to cyber attack than an independent system. The OS‑NET requires no PC, every OS‑NET sensor is essentially an independent device that can sense the occupancy status and ambient light level, and thus control the connected light as programmed individually. All network communication commands are encrypted by AES‑128 to further protect OS‑NET from wireless cyber attack.
OS‑NET devices share the same appearance as other IR‑TEC sensor and control products. To help identify the product, all OS‑NET devices will come with the OS‑NET logo on the unit and package. In addition, the LED indicator of OS‑NET devices will always blink "twice" to indicate the operation.
An OS‑NET controlled lighting system can be easily established by completing 3 works as below;
 
  • 1. INSTALLING
    For the luminaires integrated with OS‑NET sensors, you just mount the luminaires at designated positions and connect with power like the conventional lighting.

    For the OS‑NET sensor to control an individual luminaire or circuit, you just mount the devices and luminaires at designated positions, and connect them as per wiring diagram.

     
  • 2. GROUPING
    After installing all luminaires and OS‑NET devices, you need to conduct grouping process for all OS‑NET devices via operating a remote programmer.

     
  • 3. SETTING
    After grouping all OS‑NET devices, you just need to conduct necessary device settings for OS‑NET sensors to provide code‑compliant, energy smart lighting control.

 

2. Control
Every OS‑NET Sensor can be programmed to provide different control schemes based on occupancy/vacancy sensing and daylight harvesting technologies to execute on/off switching, bi‑level StepDIM and continuous SmartDIM controls to the connected lighting.
 
  • ON/OFF - This is a commonly used occupancy sensing control scheme.

    Lighting will be inhibited when the ambient light level is higher than the set threshold, regardless of occupancy or vacancy. When the ambient light level is lower than the set threshold, the controlled light will be automatically turned on once the sensor detects the presence of occupant, and turned off after the delay time has elapsed.


    NOTE: This scheme is available for dimmable or non‑dimmable lighting, but not for HID lighting.
     
  • OSO - This occupancy sensing control scheme can be applied in spaces that require lighting for 24 hours a day.

    When the space is vacant, lighting output will be reduced to Low Dim level to save energy. When space is occupied, lighting output will be instantly increased to High Dim level or continuously regulated to maintain within a pre-set range by SmartDIM control.


    NOTE: This scheme requires dimmable lighting to enable dimming control.
     
  • OSLA - This occupancy sensing control scheme can be applied in spaces that require automatic lighting when the ambient light level is lower than the set threshold.

    Lighting will be inhibited when the ambient light level is higher than the set threshold, regardless of occupancy or vacancy. When the ambient light level is lower than the set threshold, the sensor will automatically set the light to the Low Dim level. Once the sensor detects the presence of an occupant, the lighting output will be instantly increased to the High Dim level or continuously regulated within a pre-set range by SmartDIM control. Lighting output will be reduced to the Low Dim level after delay time has elapsed or shut off if ambient light level is higher than the set threshold.


    NOTE: This scheme requires dimmable lighting to enable dimming control. If lighting is non‑dimmable, all lights will remain on whenever the ambient light level is lower than the set threshold.
     
  • OSLATO - This occupancy sensing control scheme can be applied in spaces that require maintaining Low Dim lighting for a period of time after the delay time has elapsed.

    Lighting will be inhibited when the ambient light level is higher than the set threshold, regardless of occupancy or vacancy. When the ambient light level is lower than the set threshold and any sensor detects the presence of occupant, the sensor will instantly increase the lighting output to the High Dim level or continuously regulate the output to maintain overall lighting level within a pre-set range by SmartDIM control. After the delay time has elapsed, lighting output will be reduced to the Low Dim level for a period of time (TIME OFF delay) before turning off.


    NOTE: This scheme requires dimmable lighting to enable dimming control. If lighting is non‑dimmable, there will be no dim control and the delay time will be extended with the TIME OFF (TO) delay.
     
  • DSVM - This is a daylight sensing control scheme can be applied in spaces that require automatically dimming the lighting output to a low level between a certain time before and after midnight.

    When the ambient light level is lower than the set threshold, the sensor will turn the light to the High Dim level or continuously regulate the output to maintain overall lighting level within a pre‑set range by SmartDIM control. Lighting output will be reduced to the Low Dim level from a certain time before virtual midnight to a certain time after. Lighting will be inhibited during daytime.


    NOTE: This scheme requires dimmable lighting to enable dimming control. If lighting is non‑dimmable, all lights will remain on whenever ambient light level is lower than the threshold.
     
  • VSC - This is a vacancy sensing control scheme can be applied in spaces that require users to turn on the light manually, and have the sensor turn off the light automatically.

    The occupant would have to press the upper part of OS‑NET button to turn the light to the High Dim level or continuously regulate the output to maintain overall lighting level within a pre‑set range by SmartDIM control. The sensor will control the connected lighting as per OSLATO mode.

     
  • OSB - This is an advanced occupancy sensor control scheme that can be applied in open offices to provide background light level before the area of entire lighting group is vacant.

    NOTE: Do NOT use this scheme to control non‑dimmable lighting.
     
  • OFF - This is a manual control scheme can be used when you need the light to be off for a certain period of time. Once this mode is set, all lighting controlled by the sensor will remain off until another scheme is selected.
To dim multiple luminaires by a specific OS‑NET Sensor, you would have to connect the dim control wires (2) to the drivers/ballasts of all luminaires.
The number of luminaires that can be controlled by an OS‑NET Sensor is subject to dim control current of drivers/ballasts used and the total wattage of all luminaires controlled. Every OS‑NET Sensor with 0‑10V dim control current can provide up to 25 mA. You should calculate the maximum number of luminaires per sensor based on the dim control current consumption per driver/ballast and total wattage of luminaires controlled.
Yes. A single OS‑NET Sensor can be assigned to be member of multiple groups. A multi-grouped sensor will activate all lighting groups assigned whenever it detects the presence of occupant. A typical application for multi‑group control is the area with multi‑directional traffic flows, i.e. crossway and elevator hall.
Yes. An ungrouped OS‑NET Sensor will provide standalone control to the connected lighting.
In general, all OS‑NET Sensors of the same group will enter into "occupied" status and activate the respective controls to the connected lighting simultaneously whenever any OS‑NET Sensor detects the presence of occupant. But if there is area with the ambient light level higher than the set threshold, the local sensor will inhibit switching on the light except if the OSO scheme is set. The local sensor will turn the connected light off or to low dim individually according to the occupancy status and the ambient light level condition.
Yes. The OS‑NET will be an ideal solution to retrofit the existing lighting with code‑compliant smart controls. All you have to do is, replacing the existing lighting with OS‑NET enabled luminaires or install the OS‑NET Sensors to control the lighting circuits, and replacing the manual wall switch with an OS‑NET Button for manual control. After completing the group and device control settings, you can deliver an energy efficient lighting system featuring code‑compliant smart controls.
Yes. But if the controlled luminaire is dimmable, it can only receive the dim control signal from a specific OS‑NET Sensor.
Yes. You just have to execute the UNGROUP process to disengage the OS-NET Sensor from network, and then the sensor will control the connected light in standalone basis.
Yes. You just need installing an OS‑NET Button and set it as member of the target control group, then you will be able to turn on/off or dim the lighting group by pressing the button as instructed. You can also use the OS‑NET Remote to turn on/off the lighting in individual or group basis.
An OS‑NET network can link up to 250 groups. To control more than 250 lighting groups, multiple networks can be established.

 

3. DEVICE MOUNTING
The OS‑NET Sensor can be mounted, with different mounting accessories and form factors, on the ceiling above the sensing area to control the local luminaires or lighting circuit. For more information about mounting options, please refer to the Mounting Option Datasheet available in thedevice section.
An OS‑NET button can be mounted into standard NEMA wall box with mains power available.

 

4. LUMINAIRE INTEGRATION
The OS‑NET Sensor can be integrated with an OEM luminaire directly or via a mounting bracket, and provide a variety of controls to the lighting connected. For more information about luminaire integration, please refer to the Mounting Option Datasheet available in the device section.
The wireless communication range could be affected by the metallic enclosure of integrated luminaire. To obtain optimal communication range, avoid enveloping the OS‑NET Sensor with a metallic enclosure.

 

5. LENS SELECTION
OS‑NET Sensors utilize passive infrared (PIR) sensing technology to detect motions of bodies giving off heat (human or vehicle) through an optical lens. To widen the applications of OS‑NET, every OS‑NET Sensor features interchangeable lens options with different detection patterns and coverage to meet sensing requirements for different traffic flows and mounting heights.
Selecting a proper lens for an OS‑NET sensor should take the mounting height, traffic flow, and detection range into account. Please refer to the Lens Datasheet available in the device section to help select a proper lens. If further assistance is required, please contact info@irtec.com for more details.

 

6. APPLICATION
Designing an OS‑NET enabled lighting system is almost the same as designing a conventional lighting and control system. No extra work needed.
 
  • For OS‑NET enabled luminaire, just layout the position and power circuit according to the photometric characteristic of the individual luminaire.
     
  • For an OS‑NET sensor, just place the sensor at a position where it can have the best view to "see" the presence of occupant.
     
  • For an OS‑NET button, just place the button at a position convenient for user operation.
This depends on which part of the OS‑NET device fails. If the wireless communication fails, the OS‑NET sensor will still be able to control the connected lighting as programmed individually. If the other part fails, the OS‑NET sensor may not control the connected lighting as programmed.

NOTE: If the sensor operation indicator is normal, but the connected lighting is constantly off or flashing, this could possibly indicate that the driver/ballast of the luminaire has failed.
If the network communication fails, all OS‑NET Sensors will still control the connected lighting individually as programmed, but without group activation control.
The OS‑NET uses 2.4‑2.5 GHz radio bands which are available worldwide for wireless sensor networks and other data transmission. The radio communication flow rate of OS-NET devices has been kept at minimal level, and much lower than other data communication devices, so they hardly can affect other devices. However, if there are devices with busy communication and massive data transmissions loading on site, the instantaneity of OS‑NET device communication may be possibly affected and causing lag response.
Yes. IR‑TEC will continue developing more OS‑NET products, including gateway that can share data of local occupancy status, ambient light level, lighting status, output level…etc. for management purpose.
Yes, you can use an OS‑NET Sensor to control the operation of ventilation fan or fan-coil of a HVAC system. Please consult with IR‑TEC sales team for the availability of HVAC control.

 

7. SETTING
An OS‑NET network is formed by a number of wirelessly connected OS‑NET devices, mainly the OS‑NET Sensors. So every OS‑NET Sensor must be assigned to a control group in order to link up the network. Each OS‑NET Sensor can be set to control the connected lighting in a specific scheme with different parameters.

Setting an OS‑NET Sensor not only assigns the OS-NET Sensor as member of the control group(s), but also determines how an individual sensor should control the light it physically connected with.
Yes. Each OS‑NET device must be assigned as member of at least one control group in order to link up the network. Grouping all OS‑NET devices also helps control setting work faster via "GROUP‑SET" function.
Once you complete installing a new OS‑NET enabled lighting system, you would require an OS‑NET Remote Programmer (SRP‑281) to setup all OS‑NET devices. The first step is to create a new network from grouping two unconnected OS‑NET devices within 1 minute. After the network is created, you can continue grouping all other OS‑NET devices.

NOTE: To ensure the field is free of a neighboring OS‑NET network, you can select an unconnected OS‑NET Sensor and test with a temporary group setting. Wait for 1 minute and observe the LED indicator of the sensor after uploading the group setting data. If the sensor LED turns to blink in BLUE to indicate the operation after grouping completed, it means the field is free. If the sensor LED remains in GREEN after grouping completed, it means the sensor has linked to an open (unlocked) neighboring OS-NET. To prevent the unwanted cross‑network group control, execute the UNGROUP process to off-link the testing sensor from the network connected. Lock the neighboring OS‑NET if possible, or find another sensor away from the neighboring network and test again.
The easiest way to identify a network connected OS‑NET device is observing the color of LED indicator. The LED of an unconnected OS‑NET device will be indicated in BLUE, a network connected OS‑NET device will display its LED in GREEN

NOTE: An unconnected OS‑NET sensor can still control the lighting as programmed, but not group associated control. An unconnected OS‑NET button will be functionless.
A single OS‑NET device can be assigned to be member of up to 4 control groups.
This is a question without an exact answer. A control group may consist of one or many OS‑NET devices. To ensure reliable wireless communication, we suggest not exceeding 100 OS‑NET devices in a group.
Grouping the OS‑NET devices enables not only the network linkage, but also the group sensing and control capability, i.e. when any sensor detects occupancy, all sensors of the group will execute the control as programmed. In addition, only grouped OS‑NET Sensors can be set in group basis.
All you need is an OS‑NET Remote Programmer. Enter into the EZ‑GROUP page from GROUP LINK, select the numbers of group assigned, aim at the target device and press the UPLOAD button. The device will beep (OS‑NET Sensor) or blink the LED (OS‑NET Button) to acknowledge successful grouping. For other devices of the same group, you can repetitively aim and press the UPLOAD button to quickly group one by one.
The OS‑NET group activation control is actually a combined operation of TRANSMITTING and RECEIVING groups. When any OS-NET Sensor of the group detects the presence of occupant, it will transmit the OCC signal with the TRANSMITTING group number it belonged to the OS‑NET Sensors with the same RECEIVING group number to execute the programmed control respectively.

The EZ‑GROUP setting allows you to quickly complete the network linking and grouping of all OS‑NET Sensors. EZ‑GROUP will set the OS‑NET Sensors of the same group with identical TRANSMITTING and RECEIVING group numbers. Typical group activation control in most applications can be achieved by EZ‑GROUP setting.
Although typical group activation control for most applications can be achieved by EZ‑GROUP setting, certain application may require special group control that would have to rely on ADVANCED setting to achieve.

Example of special group control: When Zone A is occupied, the lighting of Zone A and B should be activated. But when Zone B is occupied, only the lighting of Zone B are required to be activated.

To achieve the above control, you can use EZ‑GROUP to setup the sensors of Zone A and B with respective group numbers, then use the ADVANCED setting to change the number of TRANSMITTING or RECEIVING group of zone sensors. You can either add the group number of Zone B to the TRANSMITTING group of Zone A sensors, or add group number of Zone A to the RECEIVING group of Zone B sensors.
After completing setup of an OS‑NET network, you should lock the network to protect the settings from accidental or unauthorized change. Furthermore, locking the network can prevent being accidentally linked by a newly installed neighboring OS‑NET network which could result in abnormal group activation due to cross‑network communication. You can LOCK the network by an OS‑NET Remote Programmer.
If multiple OS‑NET networks in the same field are required, ensure to LOCK the existing network first. Then execute the process of setup a new network to create the second OS‑NET network in the same field. By repeating the same process, more networks can be created if necessary.
To add a newly installed OS‑NET device or OS‑NET enabled lighting to an existing OS‑NET, you would have to UNLOCK the target network first, assign the device to its control group, and set the control scheme and parameters via operating the SRP‑281 remote.
You would need an OS‑NET Remote Programmer to change the settings of an OS‑NET Sensor. Enter into the DEVICE setting page, select the INDIV‑SET, set the new control scheme and parameter, aim the remote at the target sensor and press UPLOAD button. Hold it until the sensor beeps or the remote displays UPLOAD OK.

NOTE: If the network is locked, you should first UNLOCK to allow the setting change.
You would need an OS‑NET Remote Programmer to change the settings of OS‑NET Sensors in a group basis. Enter into the DEVICE setting page, select the GROUP-SET, set the new control scheme and parameters, aim the remote at any sensor of the group and press UPLOAD button. Hold it until the sensor beeps or the remote displays UPLOAD OK. Please refer to the OS-NET Programming Guide for detailed instructions.

NOTE:
  • 1. The latest OS‑NET programming guide is available from here.
  • 2. If the network is locked, you would have to UNLOCK to allow setting changes.
  • 3. After grouping, all grouped sensors will individually control the connected lighting in the same scheme and parameters based on local occupancy status and ambient light level.
  • 4. If a sensor requires specific control scheme or different parameter from the group setting, you can execute an individual setting as 7.14 described.
Changing the assigned group of an OS‑NET device is same as the initial group setting. Just enter into the EZ‑GROUP page of the remote programmer, select the new group number(s), aim the target device and press the UPLOAD button to change. The device will beep or blink its LED to acknowledge the change.

NOTE: If the network is locked, you would have to UNLOCK to allow the setting change.
You can use an OS‑NET Remote Programmer to download the current settings and group assigned from an installed OS‑NET Sensor. Just aim the remote at the target sensor, press DOWNLOAD button and hold it until download completed. All settings of the target sensor will be displayed on respective pages of the remote.


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