Bosch Ceiling Motion Detector Installer's Guide: DS939 and DS9370

Benefits of Using a Ceiling Mount 360-Degree Motion Detector
Bosch's ceiling mount 360-degree motion detectors offer comprehensive coverage, ensuring no blind spots in a designated area. This type of detector is ideal for large rooms, hallways, or open spaces where wall-mounted sensors might miss movement in certain zones. By installing the detector on the ceiling, it can monitor an entire room from a central vantage point, improving the overall security and response time to any detected motion. Additionally, the wide coverage reduces the number of sensors needed, which can lower installation and maintenance costs while still providing robust security.

Benefits of Familiarizing with Installation
Becoming familiar with the installation process of a ceiling mount 360-degree motion detector is crucial for ensuring proper setup and functionality. The resources below provide guidance and offer professional tips that can save time and prevent mistakes and return visits to the installation location.

Proper installation maximizes the detector's effectiveness, ensuring it operates at peak performance. Additionally, understanding the installation nuances helps in troubleshooting potential issues, ultimately leading to a more reliable security system and peace of mind for the facility occupants.

Getting Started

The video and information below provide installation information for two series of Bosch ceiling mount motion detectors: DS939 and DS9370.

The first is a PIR motion detector: DS939. The second is a Tritec series, DS9370 (DS9371) that uses three technologies, PIR, microwave, and advanced signal processing.

Detection Pattern

The panoramic motion detectors have three separate lenses to provide 360 degree coverage, the lenses split the coverage into three fully adjustable P. I. R. Zones.

The coverage area can be reduced by using the masks provided.

For example, here is the pattern with 90 degrees masked.

Here it is with 120 degrees masked.

Opening the Detector

To open the detector. Locate the arrow on the cover. Insert a flathead screwdriver in the recess between the cover and the base.

Twist the screwdriver and the detector will open. One side of the cover remains attached to the base of the detector. This hinged cover keeps your hands free for wiring and configuration. The base plate allows for several mounting options.

Configuration

Inside the unit, there are knobs that correspond to each lens. They have nine lettered settings, which determine the size of the radius of each zone. By turning the knob, you are vertically adjusting the lens.

Coverage pattern is determined by both mounting height and the size of the radius. Not every setting can be used for each mounting height. Use this table to tell you which settings are available for your mounting height.

Mounting height is listed as the rows. The maximum range, radius, is listed as the columns. The range is the distance from the detector to the outside edge of the coverage pattern. For example, if we are mounting the detector at a height of 3. 7 meters, 12 feet, and we want a radius of 6. 1 meters, 20 feet, we would set the dial to letter D. This is the detection pattern for this example:

Here is the range setting at letter F:

Here it is at letter G:

With all detection zones customized, we have optimized the coverage pattern and have reduced the chance of false alarms.

For the Tritec series, the microwave range can be adjusted with a potentiometer. Turn clockwise to increase and turn counterclockwise to decrease the microwave range.

PIR sensitivity can be set to low or high.

The tricolor LED may also be turned on or off.

Mounting and Wiring

Route wiring is necessary to the rear of the base and through the center hole or wire entrance for surface mounting. The product terminals allow for flexible wiring configurations. The terminal blocks are liftgate style and hold the wire firm to prevent intermittent connections later on.