**Device Type:** Binary Input - Motion/Presence Detection

**Signal:** Dry contact (relay output) or 0-10VDC

**Power:** 24VAC/VDC or 120VAC (depending on model)

**Version:** 1.0 | **Date:** Dec 2025

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**Common Models:**

- Leviton OSC/ODC, Lutron LOS, Wattstopper DT/CI, Honeywell HRME, Sensor Switch CMD

**Used For:**

Lighting control (auto on/off), HVAC setback (unoccupied mode), demand control ventilation, security/access, energy savings

- **PIR (Passive Infrared):** Detects body heat/motion - best for large open areas

- **Ultrasonic:** Detects movement via sound waves - best for restrooms, behind obstructions

- **Dual-Tech:** PIR + Ultrasonic combined - reduces false triggers

- **Daylight Harvesting:** Integrated light sensor for dimming control

- **Detection Range:**

* Ceiling mount PIR: 360° coverage, 20-30 ft radius

* Wall mount PIR: 180° coverage, 15-20 ft range

* Ultrasonic: 10-15 ft typical

- **Output:**

* Dry contact relay (NO or NC)

* 0-10VDC analog (for dimming or occupancy level)

- **Power:** 24VAC/VDC (low-voltage) or 120VAC (line-voltage)

- **Time Delay:** Adjustable 30 sec - 30 min typical

- **Sensitivity:** Adjustable (low/medium/high)

**Environment:** Indoor, 32-104°F, 0-95% RH non-condensing

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- ☑ Safety glasses (ANSI Z87.1)

- ☑ Work gloves

- ☑ **Insulated gloves if 120VAC model**

- ☑ Ladder safety equipment (ceiling mount)

- ⚠️ **LADDER WORK** - Most common hazard (ceiling mounting)

- ⚠️ **LINE VOLTAGE** - 120VAC models have lethal voltage

- ⚠️ **FALLING OBJECTS** - Sensor or tools can fall during ceiling install

- [ ] **Required for 120VAC models** - Lock out lighting circuit

- [ ] NOT required for 24VAC/VDC low-voltage models

- [ ] Verify voltage before touching wires

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- Drill + bits

- Wire strippers

- Screwdrivers

- Multimeter

- Ladder (appropriate height)

- Voltage tester

- Label maker

- Small flathead (for DIP switch adjustment)

- Occupancy sensor (correct type for application)

- Wire (18AWG for low-voltage, 14AWG for line-voltage)

- Wire nuts

- Ceiling/wall mounting hardware

- Labels

- [ ] Select correct sensor type (PIR, ultrasonic, dual-tech)

- [ ] Verify coverage area adequate for space

- [ ] Confirm mounting height appropriate (8-12 ft typical for ceiling)

- [ ] Check power available (24V or 120V)

- [ ] Review wiring diagram for model

1. **Coverage considerations:**

- Center of room preferred (360° PIR coverage)

- Avoid corners (dead zones behind sensor)

- Avoid direct line of sight to HVAC diffusers (air movement triggers ultrasonic)

- Avoid windows with direct sunlight (can trigger PIR)

- Height: 8-12 ft typical (follow manufacturer spec)

2. **Mounting location:**

- Ceiling: Use electrical box or sensor mounting bracket

- Wall: 6-8 ft height typical, aimed at expected occupant location

1. **Lock out power** if integrating with lighting circuit

2. **Mount sensor to ceiling:**

- Attach to electrical box or bracket

- Route low-voltage control wire through ceiling to sensor

3. **Connect wiring:**

* Red: +24VAC/VDC

* Black: Common

* Relay NO: To controller binary input

* Relay COM: To controller common

- **When occupied:** Relay closes = BI TRUE

- **When vacant:** Relay opens = BI FALSE

4. **Tighten terminals:** 7-9 in-lbs

1. **LOCK OUT lighting circuit breaker**

2. **Verify 0V with voltage tester**

3. **Mount sensor**

4. **Connect wiring:**

- Black (hot) from breaker → Sensor line input

- White (neutral) → Sensor neutral

- Red (switched hot) → Sensor load output → Lighting

- Green/bare (ground) → Sensor ground

5. **For BAS integration:**

- Use sensor's low-voltage relay output (if available)

- Connect relay to controller binary input

1. **Time Delay:**

- Lighting: 5-15 min typical

- HVAC: 15-30 min typical

- Set longer for areas with intermittent occupancy

2. **Sensitivity:**

- High: Detects small movements (office, classroom)

- Medium: Normal movements (conference room)

- Low: Large movements only (warehouse)

3. **Mode:**

- Auto On/Auto Off: Turns on when occupied, off when vacant

- Manual On/Auto Off: Must manually turn on, auto turns off

- Vacancy Mode: Manual on, auto off (energy code compliant in some areas)

4. **Photocell (if equipped):**

- Enable: Prevents operation if daylight adequate

- Disable: Operates regardless of light level

5. **Coverage Pattern (some models):**

- 360° for ceiling mount

- Sector coverage for wall mount

- Example: "RM-201-OCC" (Room 201 Occupancy)

- Label at both sensor and controller ends

- See Proof Out Tests section

- [ ] Sensor mounted securely (ceiling or wall)

- [ ] Coverage area verified

- [ ] Wiring terminated tight

- [ ] Settings configured (time delay, sensitivity, mode)

- [ ] Labels applied

- [ ] Work area cleaned

- [ ] Photos taken

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- **After time delay expires:** Relay open = FALSE/0 (vacant)

- **Sensor LED:** May blink when detecting motion (varies by model)

- **Relay Output:** Closed = TRUE/1 (occupied)

- **Controller Display:** Shows "Occupied"

- **Sensor LED:** May illuminate or blink (varies)

- **During time delay:** Relay stays closed (still occupied)

- **After time delay:** Relay opens = FALSE/0 (vacant)

- **Example:** 15-min delay means sensor shows vacant 15 min after last motion

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- **Do:** Walk into sensor coverage area

- **Expect:**

* Sensor LED blinks or illuminates (if equipped)

* Relay closes within 1-2 seconds

* Controller shows "Occupied"

- **Pass If:** Sensor detects occupancy immediately

- **Do:** Walk around room in grid pattern, all areas

- **Expect:**

* Sensor detects motion in all areas

* No "dead zones" where motion not detected

- **Pass If:** Full room coverage confirmed

- **If dead zones:** Adjust sensor aim or add additional sensor

- **Do:**

1. Occupy room (trigger sensor)

2. Leave room and stand outside

3. Time how long until sensor shows vacant

- **Expect:** Sensor shows vacant after configured time delay

- **Pass If:** Time delay matches setting (±10%)

- **Example:** Set to 15 min, should trigger 14-16 min after last motion

- **Do:** Make small movements (typing, reading) in various locations

- **Expect:**

* High sensitivity: Detects small movements

* Medium sensitivity: Detects normal movements

* Low sensitivity: Detects only large movements

- **Pass If:** Sensitivity appropriate for space use

- **Adjust if:** False triggers (too sensitive) or misses occupancy (not sensitive enough)

- **Do:** Room empty, observe sensor for 30 minutes

- **Expect:** No false triggers from:

* HVAC airflow

* Sunlight movement

* Reflections

* Nearby motion outside room

- **Pass If:** No false occupancy triggers

- **If false triggers:** Adjust sensitivity, reposition sensor, or cover windows

- [ ] Sensor appears in controller BI list

- [ ] Occupied/vacant status displays correctly

- [ ] Graphics show occupancy status

- [ ] HVAC responds to occupancy (setback when vacant)

- [ ] Lighting responds (if integrated)

- [ ] No communication errors

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1. **Check power:** Verify 24VAC or 120VAC present

2. **Test sensor:** Walk directly under sensor, wave arms

- **If LED blinks but no relay:** Wiring issue

- **If no LED blink:** Sensor failed or power issue

3. **Check wiring:** Verify relay output connected to controller BI

4. **Test relay:** Measure continuity across relay contacts when occupied

- **If no continuity:** Sensor relay failed

5. **Check controller config:** BI configured as NO contact?

1. **Check for false triggers:**

- HVAC airflow directly at sensor (ultrasonic)

- Sunlight through windows (PIR)

- Reflective surfaces (mirrors, shiny floors)

- Motion outside room (open doorway)

2. **Reduce sensitivity:** Adjust to medium or low

3. **Reposition sensor:** Away from triggers

4. **Check wiring:** Short circuit causing relay to stay closed?

5. **Check relay:** Relay contacts stuck closed - replace sensor

1. **PIR sensors require motion:**

- Person must move to be detected

- Sitting still may not trigger sensor

- **Solution:** Use ultrasonic or dual-tech

2. **Check sensitivity:** May be set too low

- Increase sensitivity setting

3. **Check dead zones:** Person may be in coverage gap

- Reposition sensor or add additional sensor

1. **Increase time delay:**

- Lighting: Try 10-15 min

- HVAC: Try 20-30 min

2. **Check sensor type:**

- PIR requires movement to reset timer

- Ultrasonic better for seated occupants

3. **Consider dual-tech:** Maintains occupancy better

1. **Decrease time delay:**

- Set to minimum acceptable for application

2. **Check for false triggers:**

- May be constantly re-triggering from HVAC, sunlight, etc.

- Sunlight movement through windows → Add blinds or reposition

- Heat sources (space heaters, equipment) → Reposition sensor

- Air movement from diffusers → Adjust sensitivity

- HVAC air turbulence → Reposition or reduce sensitivity

- Fans or moving equipment → Reduce sensitivity

- Sound/vibration → Isolate sensor from vibration source

1. **Check coverage area:** Person in dead zone?

2. **Increase sensitivity:** May be set too low

3. **Check sensor type:**

- PIR only detects movement (not presence)

- Person sitting still won't trigger PIR

- **Solution:** Use ultrasonic or dual-tech

4. **Check sensor aim:** Wall-mount sensors must aim at occupied area

5. **Check obstructions:** Furniture, partitions blocking view

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- [ ] Verified power at sensor (24VAC or 120VAC)

- [ ] Tested sensor by walking under it (LED response)

- [ ] Measured relay output continuity (open vs closed)

- [ ] Checked wiring connections tight

- [ ] Verified coverage area (no dead zones)

- [ ] Checked for false trigger sources (HVAC, sunlight)

- [ ] Adjusted sensitivity and time delay settings

- [ ] Documented sensor behavior over 30+ minutes

- [ ] Taken photos of sensor location and settings

- **Sensor:** [Mfg / Model / Type: PIR/Ultrasonic/Dual / Location]

- **Power:** 24VAC/VDC or 120VAC

- **Coverage Area:** _____ ft² (room size)

- **Mounting Height:** _____ ft

- **Sensor Behavior:** Never occupied / Always occupied / Intermittent / Slow

- **LED Activity:** Blinks / Doesn't blink / Always on

- **Relay Status:** Open / Closed / _____ ohms

- **Time Delay Setting:** _____ minutes

- **Sensitivity Setting:** High / Medium / Low

- **False Trigger Sources:** HVAC / Sunlight / None identified

- **Symptoms:** [Specific problem]

- **Steps Taken:** [Troubleshooting completed]

- **Field Specialist:** [Phone]

- **Electrician:** [Phone] (if 120VAC wiring issue)

- **Programmer:** [Phone] (if control logic issue)

- **Dispatch:** [Phone]

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✓ **Sensor selection:** PIR for large open areas, ultrasonic for restrooms/obstructed areas, dual-tech for best performance

✓ **Mounting height:** 8-12 ft typical - too high reduces sensitivity, too low reduces coverage

✓ **Time delay:** Longer for HVAC (20-30 min), shorter for lighting (5-15 min)

✓ **PIR limitation:** Only detects movement, not presence - person sitting still won't maintain occupancy

✓ **Ultrasonic advantage:** Detects small movements (typing, breathing) - better for seated occupants

✓ **False triggers:** HVAC airflow (ultrasonic), sunlight (PIR), nearby motion (both)

✓ **Dead zones:** Directly below ceiling mount sensor, behind obstructions

✓ **Energy codes:** Some jurisdictions require vacancy mode (manual on) vs auto on

✓ **Coverage overlap:** Multiple sensors can share same space, extend time delay

✓ **Dual-tech operation:** BOTH technologies must trigger for occupancy (reduces false triggers)

✓ **Daylight harvesting:** Use photocell to prevent operation during daylight (additional energy savings)

✓ **Integration:** Use for HVAC setback, lighting control, security, demand control ventilation

- **Private Offices:** 15-20 min (intermittent occupancy)

- **Conference Rooms:** 20-30 min (presentations = minimal movement)

- **Classrooms:** 15-20 min (lecture = seated students)

- **Restrooms:** 5-10 min (short-term occupancy)

- **Break Rooms:** 10-15 min (variable use)

- **Warehouses:** 30 min (large space, intermittent activity)

- **Corridors:** 5-10 min (transient occupancy)

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**Document ID:** SSO-OCCUPANCY-001

**Revision:** 1.0

**Next Review:** Dec 2026