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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 Light Level is at default (maximum). Press and hold the pushbutton for
5 seconds or until the Green LED flashes rapidly. Wait 10 seconds for the flashing to
stop.
3. Ensure that the Ultrasonic Sensitivity trimpot is set to about 70%, clockwise.
4. Remain still. The red and green LEDs should not flash. The lights should turn off after 5 seconds. (If not, see "Troubleshooting.")
5. 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 and Light Level 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.
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Ultrasonic sensitivity
trimpot
DIP switches
Ultrasonic
transducer
cones
Ultrasonic
activity
LED (Green)
Test Mode/20 min
Walk-Through
PIR Sensitivity
= Factory Setting
= ON
= OFF
Keyhole slots
(for mounting to
4" octagonal box)
Double gang
mudring
mounting holes
PIR Activity
LED (Red)
PIR lens
Feature
Switch#
1 2 3
Time Delay
30 seconds
5 minutes
10 minutes
15 minutes
20 minutes
25 minutes
30 minutes
4
Enabled
Disabled
5
Minimum
Maximum
Settings
6 7 8
Standard
Option 1
Option 2
Option 3
Option 4
Option 5
Option 6
Option 7
Trigger
Standard
Either(5)
Both
Either
Option 1
Either
Either
Either(5)
Option 2
PIR
Either
Either(5)
Option 3
Both PIR
Both(5)
Option 4
PIR
PIR
PIR(5)
Option 5
PIR
Either
Either(5)
Option 6
Man.
Either
Either(30)
Option 7
Man. PIR Both(30)
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