Product Details Portlet

D7S Vibration Sensor

Helps Prevent Fire and Other Secondary Disasters after an Earthquake. The World's Smallest Class Size Seismic Sensor.

  • Using the SI value, which has a high correlation with the seismic intensity scale that indicates the magnitude of an earthquake, provides higher-precision judgment of seismic intensity scales.
  • The 3-axis acceleration Sensor and OMRON's unique SI value calculation algorithm achieve surface-mountable compact modules and low power consumption.
  • Higher degree of freedom for incorporation into devices and prolonged operation on battery power.
  • Shutoff output terminal (INT1) operates equivalent to a conventional mechanical vibration sensor and ensures compatibility with mechanical vibration sensors.
  • I2C interface is able to obtain earthquake-related information from the Sensor with communications from external devices.
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Type Appearance Power supply voltage Model
Surface-mounting
Vibration Sensor
2.1 to 5.5 V D7S-A0001
Item Model
D7S-A0001
Power Supply Voltage 2.1 to 5.5 V
Current consumption During standby: 90 μA or less
Processing (average): 300 μA or less
Operating Temperature −30 to 70°C (with no condensation or icing)
Storage Temperature −40 to 80°C (with no condensation or icing)
Ambient Humidity 25% to 95% (with no condensation or icing)
Storage Humidity 25% to 95% (with no condensation or icing)
Acceleration Detection Range −2,000 to 2,000 gal
Shutoff Output (INT1) Output at seismic intensity level 5 or higher.
Communications Interface I2C
Dimensions 10.9 × 9.8 mm
Installation angle ±5°

Terminal Arrangement
Terminal Arrangement
No. Signal Function Direction Description
1 VCC Power supply voltage  
2 INT1 Shutoff output OUT An open-drain output.
Goes active (ON) when the shutoff judgment condition and collapse detection condition
are met.
3 INT2 Processing notification
output
OUT An open-drain output.
Goes active (ON) during earthquake calculations, offset acquisition, and self-diagnostic
processing.
4 SCL I2C clock IN Pull up the voltage to VCC even when you do not use I2C.
5 SDA I2C data IN/OUT Pull up the voltage to VCC even when you do not use I2C.
6 GND Power supply ground  
7 SETTING Initial setting input IN Changes the Sensor to Initial Installation Mode for an input from an external device.
Normal Mode: High
Initial Installation Mode: Low
8 NC Not connected Completely floating and cannot be connected to another line.
9 VCC Power supply voltage  
10 GND Power supply ground  

Block Diagram
Terminal Arrangement

Circuit Diagrams
Terminal Arrangement

Operation Chart
Terminal Arrangement
Unit: mm (inch)
D7S-A0001
形D7A-□:外形1
Recommended Mounting Conditions
Peak mounting temperature: 245°C min. (260°C max.)
Reflow time: 64 to 80 s (220°C)
Reflow repetitions: Up to 2

Precautions for Correct Use

Operating Environment
• Do not use the Sensor in locations with volatile, flammable, or corrosive gas (organic solvent vapor, sulfite gas, chlorine, sulfide gas, ammonia gas, etc.) or other toxic gases. They may cause the Sensor to break down.
• Do not use the Sensor in locations subject to fresh water, salt water, water drops, or splattering oil.
• Do not use the Sensor in an environment where condensation or icing may occur. Moisture freezing on the Sensor may cause output to fluctuate or may cause the Sensor to break down.
• Do not use the Sensor in locations subject to direct sunlight. Doing so may cause the Sensor to break down.
• Do not use the Sensor in locations subject to direct radiant heat from heating equipment. Doing so may cause the Sensor to break down.
• Do not use the Sensor in locations with severe temperature changes. Doing so may cause the Sensor to break down.
• Do not use the Sensor in environments with excess mechanical stress. Doing so may cause the Sensor to malfunction or break down.
• Do not use the Sensor in locations with large vibration or shock. These may cause the Sensor to break down.
• Do not use the Sensor in locations with strong electrical or magnetic fields. These may cause the Sensor to break down.

Countermeasures against Noise
• The Sensor does not contain any protective circuits. Never allow the electrical load to exceed the absolute maximum ratings.
Such loads may damage the circuits. If required, install protective circuits so that absolute maximum ratings are not exceeded.
• Allow as much space as possible between the Sensor and devices that generate surges or high frequencies (such as high-frequency welders and high-frequency sewing machines). Attach a surge protector or noise filter on nearby noise-generating devices (in particular, motors, transformers, solenoids, magnetic coils, or other devices that have an inductance component).
• Wire the Sensor away from high-voltage and large-current power lines in order to prevent inductance noise. It is also helpful to separate conduits and ducts and to use shielded cables.
• When using a switching regulator, power supply switching noise may cause malfunctions, so check this before use.

Handling

• Static electricity can destroy the Sensor. Take countermeasures including grounded work benches, floors, and other charged objects and workers.
• Do not handle the Sensor in locations with excessive vapor, dust, dirt, etc.
• Do not hold the Sensor with pliers, tweezers, or similar tools, and do not subject components to damage or excessive shock due to inadequate adjustment of the mounter.
• When placing components near the edge of the PCB or near a connector, make sure that stress is not applied to the Sensor when the device is assembled or when the connector is connected or disconnected.
• Do not apply any external force to components after soldering until everything has cooled off and do not allow mechanical stress due to PCB warping or other factors.
• Under some usage conditions, ultrasound may cause the Sensor to resonate and be destroyed. OMRON cannot specify the detailed conditions under which the Sensor will be used, so we assume no responsibility if the Sensor is used in environments where ultrasound is used. If the Sensor must be used in an environment with ultrasound, check its performance in the actual environment beforehand.
• Stress due to plastic hardening may change Sensor characteristics. Do not mold seal the Sensor after mounting.
• When applying a moisture preventing coating or other coating after mounting the Sensor, select a coating with minimal stress and check operation carefully.
• Do not attempt to disassemble or modify the Sensor.
• Do not use the Sensor in safety devices or for applications in which Sensor operation would directly affect human life.
• Carefully read the precaution in the Instruction Manual before using the Sensor.
• In addition, if you use the Sensor under conditions other than those in these specifications, check Sensor operation under those conditions beforehand.

Shipping and Storage

• Do not store the Sensor in locations with harmful corrosive gas (organic solvent vapor, sulfite gas, sulfide gas, etc.)
• The Sensor is not drip proof, so do not store it anywhere that water might get on it.
• Store the Sensor within appropriate temperature and humidity ranges.
*Before storing the Sensor in an environment other than the environment recommended by OMRON, evaluate the results in the actual storage environment and judge whether or not storage there is appropriate.
• Do not store the Sensor in locations with excessive vapor, dust, dirt, etc.