legrand DT-305 Occupancy Sensor Instruction Manual

legrand DT-305 Occupancy Sensor Instruction Manual

Watt stopper ®

• 360° Dual Technology
• Low Voltage Occupancy Sensor (version 3) with Manual On feature

Catalog Number

Country of Origin: Made in China

SPECIFICATIONS

• Voltage ………………………………………………18–28VDC/VAC half rectified
• Current Consumption @24VDC/VAC ………………16mA (DC), 69mA (AC)
• Power Supply …………………………………………..Wattstopper Power Packs
• Isolated Relay Rating ……………………………………………1A @30VDC/VAC
• Operating Temperature ……………………………… 32° to 131°F (0° to 55°C)
• Time Delay Adjustment …………………………….. 30 seconds to 30 minutes
• Walk-Through Mode ……………………..3 minutes if no activity after 30 sec
• Test Mode …………………………………………….5 sec. upon DIP switch reset
• PIR Coverage (Typical) ……………………………………………………….1300 ft²
• Sensitivity Adjustment ………………..High or Low (DIP switch setting)
• Ultrasonic Coverage (Typical) ………………………………………………1300 ft²
• Sensitivity Adjustment ………………………….. Min. to Max. (trimpot)
• Frequency ………………………………………………………………..40kHz

UL & CUL Listed for use with Watt stopper Power Packs

UNIT DESCRIPTION

The Watt stopper DT-305 360° Dual Technology occupancy sensors combine advanced passive infrared (PIR) and ultrasonic technologies into one unit. The combination of these technologies helps to eliminate false triggering problems even in difficult applications.

The DT-305 turns lighting systems on and off based on occupancy. The DT-305 provides numerous operating modes that can be combined to create the ideal custom control. The sensors can be configured to turn lighting on, and hold it on as long as either or both technologies detect occupancy. After no movement is detected for a user specified time (30 seconds to 30 minutes) the lights are switched off. A “walk-through” mode can turn lights off after only 3 minutes, if no activity is detected after 30 seconds of an occupancy detection.

The DT-305 operates on 24V, supplied by Watt stopper Power Packs.

COVERAGE PATTERN

The DT-305 provides a 360° coverage pattern. The coverage shown represents walking motion at a mounting height of 8-12 feet. For building spaces with lower levels of activity or with obstacles and barriers, coverage size may decrease. The coverage for PIR ONLY trigger mode varies with mount height. Refer to pattern below for details. Ultrasonic coverage is roughly the same for 8-12 foot mount heights. Refer to PIR and Ultrasonic trigger mode coverage for details.

Drawings not to scale, representative of PIR and Ultrasonic Trigger Mode major motion coverage.

Side View

PIR Only Coverage

Top View

PLACEMENT GUIDELINES

Depending upon obstacles such as furniture or room layout, the area of coverage may be less or more than the sensing distances shown in the coverage pattern. This must be considered when planning the number of sensors and their placement. It is also recommended to place the sensor at least 4 to 6 feet away from air supply vents.

Mount the sensor to the ceiling. The DT-305 is designed for a ceiling heights of about 8-12 feet. Mounting above or below this range will significantly affect the coverage patterns. As a general rule, each occupant should be able to clearly view the sensor.

Masking the PIR Lens: Opaque adhesive tape is supplied so that sections of the PIR lens can be masked. This restricts the sensor’s view and allows you to eliminate PIR coverage in unwanted areas such as hallways outside of the desired coverage area. Since masking removes bands of coverage, remember to take this into account when troubleshooting coverage problems. The Ultrasonic coverage cannot be masked, but you can adjust its sensitivity to reduce the coverage area.

Common application: Classroom: Position the sensor so that the maximum coverage is achievable. Be sure that the sensor is not pointing out the door.

If the space is larger than 30’ x 30’ it will be necessary to use more than one sensor to ensure complete coverage.

WIRING DIRECTIONS

WARNING: TURN THE POWER OFF AT THE CIRCUIT BREAKER BEFORE WIRING.

Each Watt stopper BZ series power pack can supply power for 7 DT-305 sensors.

When using more sensors than this, multiple power packs are required. Refer to the wiring diagram on the next page for the following procedures:

Connect the low voltage:

• RED wire (+24VDC) from power pack to the +24V terminal on the sensor.
• BLACK wire (Return) from power pack to Common terminal on the sensor.
• BLUE wire from power pack to Control Out terminal on sensor.

To add a MANUAL SWITCH such as the LVSW Momentary Toggle Switch, or RS2-3 Low Voltage Momentary Switch to the above applications (see wiring diagram “Manual-On wiring with low voltage momentary switch”) – connect:

• Wire from one side of switch to +24V terminal on sensor.
• Wire from other side of switch to Man Switch terminal on sensor.

Wiring the ISOLATED RELAY: The Isolated Relay is rated for 1A@30VAC/VDC. Connect the wires necessary to the application that requires this output:

• Relay Common (must be used for proper operation)
• N.O. (Normally Open)–Closed when occupancy is detected
•  N.C. (Normally Closed)–Open when occupancy is detected

CONNECTING WIRES

• Care should be taken to separate high voltage power from low voltage (Class 2) control wiring.
• All connections to sensor are low voltage, Class 2.

Standard wiring with two local off switches

Manual-On wiring with low voltage momentary switch

MOUNTING THE SENSOR

Directly to Ceiling

1. Attach the plastic spring clips to the edge of the sensor in the slots provided.
2. Cut a 3.5” to 4” round hole in the acoustic ceiling tile at the mounting location. A 3.5” hole is recommended for a secure fit.
3. Pull the low voltage wire from the power pack to the sensor through the hole.
4. Connect the low voltage wires to the appropriate terminals on the sensor.
5. Push the sensor up through the hole until the Spring Clips hold the sensor securely in place.
6. Snap the front cover onto the sensor.
   

Using an Octagonal J-Box

1. Pull the low voltage wires from the power pack into the J-Box through the conduit knockout.
2. Connect the low voltage wires to the appropriate terminals on the sensor.
3. Loosen the appliance mounting screws attached to the J-Box.
4. Align the sensor in the J-Box so that the mounting screws on the box match the key holes on the sensor’s rear housing.
5. Push the sensor up into the J -Box and twist it so that the mounting screws are seated in the keyhole slots.
6. Tighten the two screws to secure the sensor to the J-Box.
7. Snap the front cover onto the sensor.
   

SENSOR ADJUSTMENT

This unit is pre-set for basic operation as described in this guide. Adjustment is optional.

The sensors are factory preset to allow for quick installation in most applications. Verification of proper wiring or coverage, or customizing the sensor’s settings can be done using the following procedures. To make adjustments, open the Front Cover by pulling on the cover tab.

There is a 30 second warm-up period when power is first applied.

Before making adjustments, make sure the office furniture is installed, lighting circuits are turned on, and the HVAC systems are in the overridden/ on position. VAV systems should be set to their highest airflow. Set the Logic Configuration and Time Delay to the desired settings. See the DIP Switch configuration chart.

To Test Occupancy Sensors

1. Ensure the Time Delay is set for Test Mode* using the “Test Mode/20 minutes” setting. (DIP switches 1, 2, & 3 are OFF).
2. Ensure that the Ultrasonic Sensitivity trimpot is set to about 70%, clockwise.
3. Remain still. The red and green LEDs should not flash. The lights should turn off after 5 seconds. (If not, see “Troubleshooting.”)
4. Move around within the coverage area. The lights should come on. Adjust the Ultrasonic Sensitivity as necessary to provide the desired coverage (Green LED indicates activation from the ultrasonic sensor).

When testing and adjustment is complete, reset DIP Switches to the desired settings, and replace the cover on the sensor.

* Test Mode is a temporary state that starts when you first set the sensor’s DIP switches for the “Test Mode/20 minutes” (switches 1, 2, 3, OFF). If you need to invoke the Test Mode and the DIP switches are already set for Test Mode/20 minutes, toggle DIP switch 1 ON then back to the OFF position. This provides a 10 minute test period. During the test period, the Time Delay is only 5 seconds.

MANUAL ON FUNCTION

The Manual ON function is facilitated by installing a momentary switch such as Watt stopper LVS-1  Momentary Toggle Switch, or RS2-3 Low Voltage Momentary Switch. The switch connects to the sensor’s Manual (Man.) Switch and +24V terminals as shown in the wiring diagram. Each time the switch is pressed, the load changes state. The sensor’s operation as related to the manually operated switch is determined by DIP switch settings for Occupancy Logic.

Manual Mode (Trigger Option 6 or 7): In this mode, the switch is required to turn on the load. The sensor keeps the load ON, based on occupant activity. After the time delay ends, if there is no movement detected within the 30 second re trigger period, the load turns OFF and the manual switch must be used to turn ON the load.

Automatic Mode (any Trigger Option except 6 or 7): These options use occupancy triggers as well as switch activation to turn the load ON. A manual switch provides the following additional functionality:

1. The load can be turned ON using the manual switch and it stays on according to the occupancy logic setting. The time delay operates as programmed. When the load turns OFF due to lack of occupancy detection, it can be turned ON again by occupancy detection or the switch.
2. Activating the manual switch while the load is ON turns the load OFF.
   • When the load is turned OFF manually, as long as the sensor continues to detect occupancy the load stays OFF. The length of the time delay after the last occupancy detection, the lights stay off and the sensor reverts to the automatic-on mode.
   • When the load is turned OFF manually, pressing the switch again turns the load ON and the sensor reverts to the automatic-on mode.
   • Once returning to automatic-on mode, either the switch or occupancy detection can turn the load ON.

DIP SWITCH SETTING

Time Delay: Switches 1, 2, 3
The sensor will hold the lights ON as long as occupancy is detected. The time delay countdown starts when no motion is detected. After no motion is detected for the length of the time delay, the sensor will turn the lights OFF.

Walk-through: Switch 4
Walk-through mode turns the lights OFF three minutes after the area is initially occupied, if no motion is detected after the first 30 seconds. If motion continues beyond the first 30 seconds, the selected time delay applies.

PIR Sensitivity: Switch 5

• Minimum forces a reduced detection range for the PIR.
• Maximum causes the DT-305 to monitor the controlled environment and automatically select the maximum sensitivity that will provide reliable operation without false detection. This setting is constantly updated.

Occupancy Logic: Switches: 6, 7, 8
The DT-305 has 8 logic configurations for occupancy triggers, set with DIP switches 6, 7 & 8. Determine the appropriate Occupancy Logic Option using the Trigger matrix, then set the DIP switches accordingly.

Initial Occupancy: The method that activates a change from “Standby” (area unoccupied and loads are OFF ) to “Occupied” (area occupied and loads are ON)

• Both requires detection by PIR and Ultrasonic.
• Either requires detection by only one technology.
• PIR requires detection by the PIR.
• Man. requires activation of the Manual Switch. (See Manual ON functions” for further information.)

Maintain Occupancy: The method indicating that the area is still occupied and the lights should remain ON.

Re-trigger: After the time delay elapses and the lights turn OFF, detection by the selected technology within the number of seconds indicated turns the lights back ON.

OVERLOAD PROTECTION

The occupancy sensor has a built in overload protection function that will automatically turn off the control output when the load current exceeds 200mA. The sensor LEDs will then blink rapidly (~ 10Hz) to provide a visual indication of an overload condition. When the load current is corrected or returns to normal, the control output will turn back on.

TROUBLESHOOTING

For any unexpected operation:

1. Check DIP switch settings. Make sure the switches are set according to the defined settings in the DIP Switch Setting chart.

Lights do not turn on when entering the room.

Neither LED Flashes.

1. Check that the circuit breaker has been turned back on.
2. Check all sensor and power pack wire connections.
3.  Check for 24VDC input to the sensor between the red and black low voltage wires.
   • If 24VDC is present, replace the sensor.
   • If 24VDC is not present, check the high voltage connections to the power pack.
   • If high voltage connections are good and high voltage is present, replace the power pack.

Red LED does not flash.

1. When power is initially applied to the sensor, there is a warm-up period of 30 to 60 seconds before the LED becomes active.
2. Make sure PIR sensitivity is set to 100% (DIP switch #5 is in the “off” position).

Green LED does not flash.
Ultrasonic sensitivity setting may need to be increased. Turn adjustment trimpot clockwise until the LED begins to flash when movement occurs.

Green LED is on steady.
Check ultrasonic sensitivity trimpot. Fully counterclockwise position is the override for the sensor. Turn trumpet clockwise until LED flashes only when movement occurs in the desired coverage area.

Red and Green LEDs flash.

1. Check all sensor and power pack connections.
2. Check for 24VDC at the power pack blue and black wire connections to sensor while sensor is active.
   • If there is no voltage, replace the sensor.
   • If there is voltage, check for 24VDC between the blue and black wire at the power pack. If 24VDC is present and the relay is not closing, replace it.
   • If 24VDC is not present, check for a break in the low voltage wiring.
3. If LEDs are flashing rapidly (~10Hz), an overload condition exists. When this is corrected, the sensor will return to normal operation. Check the blue wire connection. If necessary, replace the power pack.

Lights do not turn off automatically.

Green LED flashes.
Reduce ultrasonic sensitivity by turning adjustment pot counter-clockwise until it only flashes when movement occurs.

Red LED flashes briefly and Green LED does not flash.
Check to see if you have used the Manual Switch connection. Do not connect anything to this terminal if you are not using a low voltage momentary switch between the sensor and power pack.

Red LED randomly flashes.
Set PIR sensitivity to minimum by turning DIP switch 5 to the “on” position.

Lights do not turn off.

1. Check all sensor and power pack wire connections.
2. Disconnect power pack blue wire.
   • If lights do not turn off, check power pack wiring. Replace the power pack if necessary.
   • If lights turn off, the problem may be the sensor or wiring between the sensor and power pack.
3. Reconnect the blue wire.
   • Turn sensitivity and time delay to minimum, and allow the sensor to time out.
   • If lights turn off, the sensor is working properly – adjust sensitivity and time delay for the sensor.
   • If lights do not turn off, check the wiring between the sensor and power pack.
   • If wiring is correct, replace the sensor.

SERVICE

To override all sensor functions, set the Ultrasonic Sensitivity trypot to the fully counterclockwise (Service) position.

This bypasses the occupancy control functions of the sensor, but still allows the lights to be manually controlled with a light switch, if one is installed. While in Service mode, the red LED will turn on and remain on to confirm the unit is in Service mode status.

ORDERING INFORMATION

incandescent, 1HP@120/250VAC
BZ-200, BZ-250| Power Pack: 120/277 VAC, 50/60Hz, 225mA, 20A ballast/ELV/MLV/incandescent/LED;16A E-ballast/CFL
S120/277/347E-P| Auxiliary Relay Pack: 120/277VAC, 60Hz, 20A Ballast, 347VAC, 60Hz, 15A Ballast

All sensors are white.
BZ series power packs supply power for up to 5 DT-305 sensors.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE: 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. These limits are designed to 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 harmful interference in which case the user will be required to correct the interference at his own expense.

WARRANTY INFORMATION

Watt stopper warranties its products to be free of defects in materials and workmanship for a period of five (5) years. There are no obligations or liabilities on the part of Watt stopper for consequential damages arising out of, or in connection with, the use or performance of this product or other indirect damages with respect to loss of property, revenue or profit, or cost of removal, installation or reinstallation.

No. 23948 – 07/20 rev. 8
© Copyright 2020 Legrand All Rights Reserved

800.879.8585
www.legrand.us/wattstopper

References

• Wattstopper Lighting Control Systems

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