Datasheet

D7A
Automatic Horizontal Vibration Sensor
Quickly Detect Earthquakes to
Help Prevent Secondary Disasters.
Auto-level Mechanism Enables
Mounting at ±5°
• Auto-level mechanism for mounting leeway of ±5°.
• Models provided for mounting to horizontal PCBs,
vertical PCBs, or with screws.
RoHS Compliant
■ Ordering Information
Appearance
Mounting type
Model
Horizontal mount
D7A-1
Vertical mount
D7A-2
Screw mount
D7A-3-1
Item
Operating characteristic
Output
Basic specifications
D7A
■ Performance
Model
D7A-1
D7A-2
D7A-3-1
Type
Horizontal mount
Vertical mount
Screw mount
Acceleration range
90 to 170 gals*
Contact form
SPST-NO
Electrical ratings
5 μA to 1mA at 3 VDC
Contact resistance
Initial value: 1 Ω max. (measured at terminals)
Electrical life expectancy
10,000 operations (at 10 to 20 operations/min with resistive load of 1 mA at 3 VDC)
Degree of protection
IP40 (switch section)
Operating temperature
−30 to 70°C (with no icing or condensation)
Storage temperature
−40 to 70°C (with no icing or condensation)
Operating humidity
25% to 85%
Dielectric strength
250 VAC, 50/60 Hz for 1 min
* This is the average value of three measurements that were taken with the continuous horizontal vibration method with periods of 0.3 s, 0.5 s, and 0.7s.
Note: Ask your OMRON representative for details.
1
D7A
Automatic Horizontal Vibration Sensor
■ Dimensions (Unit: mm)
D7A-1
PCB Mounting Holes
12
0.6±0.1
3.5±0.1
2.5±0.1
22.5 dia.
20 dia.
16.4±0.1
0.5
19.6±0.1
2.3±0.1
23.2
23.2±0.1
(PCB mounting holes)
21.8
Note: Mount the Vibration Sensor to a
PCB with a thickness of 1.6 mm
and solder it.
3
3.3±0.1
1.7
2±0.1
16.4±0.2
21.5
24.2
D7A-2
PCB Mounting Holes
19.6
21.2
20±0.1
1±0.1 dia.
9.4±0.1
1.6
22.5 max.
2±0.1
3.6±0.1
19.6±0.1
(PCB mounting holes)
0.7±0.1
Note: Mount the Vibration Sensor to a
PCB with a thickness of 1.6 mm
and solder it.
22.3
9.4±0.1
D7A
3.3±0.2
3.9
D7A-3-1
Mounting Hole Dimensions
VW-HT Lead Wire
9.3
4.5 4.8
23.6
SMF-01T-1.0 Connector
from JST Mfg. Co.
5.85
31.25
+10
85-5
1
12.3
5
14.54
M4, Depth: 3.5 min.
22±0.1
Two, 6
0.2
6.1 +0.10
−0.05 dia., Depth: 1.2
C0.5±0.2
0
−0.1
dia.
Two, 4.3 dia. holes
C6.5
5.8
5.3
4.5
22.3
24.3
16.5
Up
27 27.6
22±0.1
Note: Mount the Vibration Sensor with
M4 mounting screws or the equivalent and tighten the screws to a
torque of 0.981 to 1.176N·m
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■ Safety Precautions
• These Vibration Sensors are precision devices. Handle them with care. Never use a Vibration Sensor that has been dropped. Also, if a
Vibration Sensor has been subjected to excessive shock, do not handle it as a normal Vibration Sensor and inspect it again or take
other measures to confirm proper operation.
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Automatic Horizontal Vibration Sensor
D7A
D7A
• Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product.
• Consult your OMRON representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad
systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious
influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or
equipment, and be sure to provide the system or equipment with double safety mechanisms.
Note: Do not use this document to operate the Unit.
OMRON Corporation
Electronic and Mechanical Components Company
Contact: www.omron.com/ecb
Cat. No. A218-E1-02
1014(O)
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