Product Overview
The Extron OCS 100W is a dual-technology occupancy sensor designed to automate meeting and presentation spaces when integrated with Extron control products. It features ultrasonic (US), infrared (PIR), and photocell sensors that work together to report ambient light conditions and room occupancy. The sensor can be wired directly to Extron controller products equipped with Digital I/Os ports or via eBUS, utilizing optional eBUS interface accessories.
The OCS 100W requires 24 VDC for operation. If local 24 V power is unavailable, the included 12 V to 24 V, USB 5 V to 24 V power converter can be used.
NOTE:
The OCS 100W is designed to detect occupancy using both the PIR and US sensors with their default settings to avoid false detections.
Front Panel Features and Control
Visual Description of OCS 100W Front Panel and Controls
The OCS 100W features a white, rounded rectangular body with a removable front cover. On the front panel, visible when the cover is removed, are:
- Ultrasonic (US) Green LED: A status indicator that flashes when ultrasonic sensors detect occupancy.
- Infrared/Photocell Sensor and Lens: A central component that includes both infrared and photocell sensing capabilities.
- Infrared (PIR) Red LED: A status indicator that flashes when the infrared sensor detects occupancy.
- Blue Timer Test Button: A button used for timer test mode.
- Red Infrared Sensitivity Dial: A rotary dial to adjust infrared sensitivity.
- Green Ultrasonic Sensitivity Dial: A rotary dial to adjust ultrasonic sensitivity.
- Blue Photocell Sensitivity Dial: A rotary dial to adjust photocell sensitivity.
- DIP Switches (A) and (B): Two sets of small switches for configuring various functions.
Sensor Descriptions
- Ultrasonic Sensors (2): Detect movement by emitting ultrasonic sound waves and measuring changes in their return speed caused by people's movement.
- Ultrasonic (US) Green LED status indicator: Flashes when ultrasonic sensors detect occupancy.
- Infrared/Photocell Sensor and Fresnel Lens: The Fresnel lens directs incoming light to the infrared sensor. The Infrared (PIR) sensor detects people by sensing differences in heat generated by moving individuals versus ambient room temperature.
- Infrared (PIR) Red LED status indicator: Flashes when the infrared sensor detects occupancy.
- Removable Front Cover: Conceals all controls and DIP switches.
DIP Switches (A) Configuration
| A | Switch Function | OFF | ON | Note |
|---|---|---|---|---|
| 1 | Not used | *Not used | Not used | Switch is not used. |
| 2 | Occupancy detection behavior - Dual Technology Mode | *Mutually exclusive (requires both PIR and US detection) | Independent (either PIR or US detection) | If A2 is set to OFF, both the PIR and US sensors must be triggered simultaneously before the OCS reports an occupancy signal. If A2 is set to ON, the OCS reports occupancy based on only one of the sensors being triggered. When only one sensor is desired, set A2 to ON and adjust the dials accordingly. If A2 is ON, false detection when the room is not occupied increases. |
| 3 | Sensor status indicators | *LEDs enabled | LEDs disabled | Setting A3 to OFF provides a visual notification whenever the PIR or US sensors are triggered. When the visual LED indicators are a distraction or users want to disable the flashing LEDs, A3 should be set to ON. |
| 4 | Automatic adjust reset | *Retain learned sensor adjustments | Erase all learned settings (toggle ON, then OFF) | Only applicable when Timer (B3) or Sensitivity adjust (B4) or both are set to Automatic mode (OFF). Toggling A4 ON then OFF will reset any stored learned adjustments. |
*Default and recommended settings
DIP Switches (B) Configuration
| B | Switch Function | Settings | Note | |||
|---|---|---|---|---|---|---|
| 1 | Timer Setting (B1 and B2 switches must be set together) | *8 minutes: OFF | 4 minutes: ON | 15 minutes: OFF | 30 minutes: ON | In manual mode only (B3 set to ON), set the amount of time before the sensor triggers OFF when there is no occupancy detected. In automatic mode (B3 set to OFF) the timer settings are ignored. |
| 2 | *OFF | ON | ON | ON | ||
| B | Switch Function | OFF | ON | Note |
|---|---|---|---|---|
| 3 | Timer adjust | Automatic | *Manual | Applies to the Timer (blue), Infrared sensitivity (red), and Ultrasonic sensitivity (green) adjustment dials.
|
| 4 | Sensitivity adjust | Automatic | *Manual |
*Default and recommended
NOTE:
B3 must be set to ON for Manual mode, in order to adjust the timer switches manually. B4 must be set to ON for Manual mode, in order to adjust the infrared sensitivity and US sensitivity dials manually.
Timer Setting (B1 and B2)
The occupancy sensor has a built-in timer feature. In Manual mode (B3 set to ON), set the B1 and B2 DIP Switches together, as shown in the table above, to set the amount of time before the sensor triggers OFF. When the sensor detects motion, it instantly triggers ON. Once occupancy is no longer detected, the timer begins. If no motion is detected and the timer expires, then the sensor triggers OFF.
NOTE:
If it takes too long for the OCS to turn off when the room is unoccupied, adjust the timer to 8 or 4 minutes and extend the timer via the configuration of the connected control processor. This setup reduces false detection.
Blue Timer Test Button
- To enable an 8-second timer test mode, push the blue button once. The test mode lasts for 1 hour, and then automatically resets to the DIP switch settings.
- To cancel the 8-second test mode, push and hold the blue button until the red LED flashes, returning the OCS to the settings defined by the DIP switches.
Red Infrared Sensitivity Dial
Adjust this dial to increase or decrease infrared sensitivity.
- Turn counter-clockwise (CCW) to decrease sensitivity. Major movements are needed to detect occupancy.
- Turn clockwise (CW) to increase sensitivity. Minor movements are detected as occupancy.
- The factory default setting is at 75%.
Green Ultrasonic Sensitivity Dial
Adjust this dial to increase or decrease ultrasonic sensitivity.
- Turn counterclockwise (CCW) to decrease sensitivity. Major movements are needed to detect occupancy.
- Turn clockwise (CW) to increase sensitivity. Minor movements are detected as occupancy.
- The factory default setting is at 100%.
Blue Photocell Sensitivity Dial
Photocell prevents the sensor from triggering on when the area is adequately lit with natural light and when motion is detected. The sensor must be mounted directly over an area that is representative of the average, natural room lighting. Before setting the photocell control, wait until the natural light is brightest (optional). Adjust this dial to increase or decrease photocell sensitivity.
- Turn counterclockwise to decrease photocell sensitivity, causing it to activate with less light.
- Turn clockwise to increase photocell sensitivity, requiring brighter light to activate the sensor.
- Factory default is 100% (full clockwise) — Photocell sensor is disabled.
- Range — 10 to 1000 lux.
Recommended Setup
NOTE:
Extron recommends using the OCS 100W in the default settings when beginning the setup or the test mode. If needed, adjust slightly from the default sensitivity settings.
- Keep all the DIP switches and rotary dials in the default positions.
- Set the OCS in Test Mode.
- Enter the room several times to verify if the IR detector is detecting movement (red LED flashes).
- If the red LED flashes when entering the room, the default red infrared sensitivity dial is set correctly.
- Verify the red LED flashes with movement throughout the room.
- Turn the red infrared sensitivity dial to decrease or increase IR sensitivity, until the red LED only flashes when entering the room or making movements throughout the room.
- To avoid false detections when the room is unoccupied, do not make the sensor too sensitive.
- Enter the room and verify if the US detector is detecting movement (green LED flashes).
- If the green LED flashes when entering the room, the default green ultrasonic range dial is set correctly. This sensor is very sensitive.
- Verify the green LED flashes with movement throughout the room.
- Turn the green ultrasonic range dial to decrease or increase US sensitivity, until the green LED only flashes when entering the room or making movements throughout the room.
- To avoid false detections when the room is unoccupied, do not make the sensor too sensitive.
- Leave the room and close the door. Wait until the Digital output state, relay or red and green LEDs stay OFF. Wait several minutes to ensure there are no false detections.
- If the door remains open, the US sensor may detect changes.
- If possible, wait longer, to confirm no IR or US change is registered.
- Enter the room again to confirm the Digital output state, relay, red, or green LEDs turn ON.
NOTE:
After going through these steps and verifying the OCS is set up to accommodate the room, do not adjust the DIP switches or dials.
Automatic Mode
Out of the box, the OCS 100W can be set up in Automatic Mode, where no manual sensitivity adjustments are needed and sensitivity learning and adjustments are made automatically. For simple setup, Extron recommends keeping the OCS in the default settings and flipping the B4 DIP switch to the OFF (Auto) position. The OCS is ready to mount.
Sensor Placement and Installation Options
When placing the sensor in a room, ensure the sensor is not aimed out through a door, as it can detect hallway traffic, causing false triggers. PIR sensors trigger in response to changes in the amount of IR arriving from any of their segments of view within a direct line of sight from the sensor. US sensors trigger in response to changes in the frequency of reflected ultrasonic waves, caused by movement within the space.
NOTE:
Refer to the Troubleshooting section if false triggers are experienced.
Sensor Placement Diagrams Description
The document illustrates correct and incorrect sensor placement. A 'Wrong' placement shows the sensor's field of view extending into a hallway, indicating potential for false triggers. A 'Correct' placement shows the sensor's field of view contained within the room, avoiding the hallway.
Installation Options Diagrams Description
The document shows various mounting options:
- Ceiling Mount: The sensor is mounted on a ceiling, typically with its lens facing downwards.
- Wall Mount: The sensor is mounted on a wall, extending outwards.
- Top View Corner Mount: The sensor is mounted in a corner, providing a wide field of view.
The sensor can be rotated 60° and 80° for optimal coverage.
NOTE:
Mount the OCS 6 to 8 feet (1.8 to 2.4 m) away from HVAC vents and high air flow areas to prevent interference.
Sensor Coverage Diagrams Description
The document provides diagrams illustrating the sensor's coverage patterns for both Ultrasonic (US) and Infrared (IR) detection, at a mounting height of 10 feet (3 m).
- US Minor Motion Coverage: Extends approximately 20 feet (6 m) from the sensor.
- US Major Motion Coverage: Extends approximately 40 feet (12 m) from the sensor.
- IR Minor Motion Coverage: Extends approximately 20 feet (6 m) from the sensor.
- IR Major Motion Coverage: Extends approximately 40 feet (12 m) from the sensor.
The diagrams show a fan-shaped coverage area, with the US coverage being wider and more uniform, while the IR coverage has distinct lobes. The dimensions indicate the effective range for detecting motion.
OCS 100W Parts
Parts Description
The OCS 100W consists of several key components:
- Cover: The outer casing that protects the internal components and conceals controls. It can be pulled off for access.
- Body: The main housing of the sensor.
- Wiring Harness: A bundle of wires for connecting the sensor to power and control systems.
- Mounting Bracket: A component used to secure the sensor to a surface.
- Bracket Cover: A piece that snaps into place to conceal wiring and the mounting bracket.
- Mounting Bolt, Washer and Nut (2): Hardware for securing the mounting bracket.
Installation
ATTENTION:
- All structural steps and electrical installation must be performed by qualified personnel in accordance with local and national building codes and electrical codes.
- Only connect to Class III SELV systems.
Installation Steps
- Insert Wiring: Insert building wiring through the Mounting Bracket.
- Secure Mounting Bracket: Secure the Mounting Bracket to the wall.
- Connect Wiring: Connect building wiring to the Wiring Harness using the included wire nuts.
- Snap Bracket Cover: Snap the Bracket Cover in place to conceal wiring and the Mounting Bracket.
- Snap Sensor: Snap the sensor onto the mounting post. This step is indicated by a "POP" sound.
- Plug Wiring Harness and Secure: Plug the Wiring Harness into the connector located on the left side, opposite the exit slot. Place wiring under wire tabs. Align the sensor and tighten the position locking screw.
- Replace Cover: Replace the Removable Front Cover. This step is indicated by a "SNAP" sound.
PC 1224 Wiring
ATTENTION:
- Do not connect power to the device until the Power Attention section on page 8 has been read.
- Remove power from the system before making any connections.
- The controller and the OCS 100W must share a common ground connection to avoid ground loops and a difference in grounding potential.
The OCS 100W requires 24 VDC. If the sensors are connected to a device that does not provide 24 VDC, use the included PC 1224 power module:
- Connect a 12 VDC power source to the 12 VDC input on the supplied PC 1224 power converter, or power via the USB type-C 5 V input.
- Wire the PC 1224 24 VDC, 75 mA max connector to the black and red wires on the OCS 100W.
NOTE:
When the PC 1224 is powered via the USB 5 V input, the 24 V output is rated at 35 mA.
A 12 VDC, 1.25 A max pass-through is available to power additional 12 VDC devices, only if powered from the 12 V input.
OCS 100W External Power Supply Wiring Diagram Description
This diagram illustrates connecting the Extron OCS 100W Occupancy Sensor to an Extron IPCP PRO 250 Control Processor via an Extron PC 1224 Power Module. An external 12 VDC power supply connects to the PC 1224. The PC 1224 outputs +24 V (Red) and Ground (Black) to the OCS 100W. The OCS 100W's Occupancy Control Signal (Blue) connects to a Digital I/O port on the IPCP PRO 250. All devices share a common ground.
OCS 100W USB Power Wiring Diagram Description
This diagram shows the Extron OCS 100W Occupancy Sensor connected to an Extron TLS 1025M 10" Wall Mount TouchLink Scheduling Touchpanel via an Extron PC 1224 Power Module. The TLS 1025M connects to the PC 1224 via USB. The PC 1224 then outputs +24 V OUT (Red) and Ground (Black) to the OCS 100W. The OCS 100W's Occupancy Control Signal (Blue) connects to a Digital Input on the TLS 1025M. All devices share a common ground.
Wire Connections
| Wire | Connections | Note |
|---|---|---|
| Power | ||
| Black | Ground | Shared with all of the outputs. |
| Red | +24 VDC | Power input. |
| Occupancy Control Outputs | ||
| Blue | Occupancy control output | When wiring the blue wire of the OCS to Extron products with Digital or FLEX Input ports, configure the ports as Input without pull up. The sensor provides approximately 21 VDC in the ON state and 0 VDC in the OFF state. Use the shared black ground wire. |
| Blue/White | Common | Relay contacts could be used to trigger third party devices, such as HVAC, based on occupancy. |
| Black/White | Normally closed when unoccupied | |
| Yellow/White | Normally open when unoccupied | |
| Occupancy and Lighting Output | ||
| Gray | Occupancy and photocell control output | Typically used for lighting applications. When wiring the gray wires of the OCS to Extron products with Digital or FLEX Input ports, configure the ports as Input without pull up. The output state will remain OFF 0 VDC when occupancy is detected but there is high amount of ambient or natural light in the room. Only when there is low or no ambient or natural light in the room and occupancy is detected will the output state trigger ON 21 VDC. Use the shared black ground wire. |
Troubleshooting
| Problem | Possible Cause | Test | Solution |
|---|---|---|---|
| Sensor remains ON. | Constant noise. | Reduce both green and red knobs by 1/8 (15%) turn or remove noise source. | Move sensor to a less noisy area within the room. |
| Sensor remains OFF. | Sensitivity is set too low. | Increase both green and red knobs by 1/8 (15%) turn. | Move sensor. If the A2 DIP switch is set to OFF, set green and red US/IR sensitivity dials to normal levels. |
| Sensor remains on too long. | Timer setting too high. | Check DIP switch settings. | Reduce timer setting. |
| Hallway traffic turns sensor on. | Infrared sensor can see into the hallway. | Put sensor in timer test mode and walk the hallway. | Move sensor, so it cannot see into the hallway. |
Safety Instructions
For information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics, refer to the Extron Safety and Regulatory Compliance Guide on the Extron website.
FCC Class A Notice
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. The Class A limits provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference. This interference must be corrected at the expense of the user.
NOTE:
For more information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics, refer to the Extron Safety and Regulatory Compliance Guide on the Extron website.
Power Attention
ATTENTION:
- These products are intended for use with a UL Listed LPS type power source.
- Use of a non-LPS or unlisted power supply will void all regulatory compliance certification.
- Unless otherwise stated, the AC/DC adapters are not suitable for use in air handling spaces or in wall cavities. The power supply is to be located within the same vicinity as the Extron AV processing equipment in an ordinary location, Pollution Degree 2, secured to the equipment rack within the dedicated closet, podium, or desk.
- The installation must always be in accordance with the applicable provisions of National Electrical Code ANSI/NFPA 70, article 725 and the Canadian Electrical Code part 1, section 16.
- The power supply shall not be permanently fixed to building structure or similar structure.
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