Silicon Designs, Inc.
! 1445-NW Mall Street, Issaquah, WA 98027-5344 ! Phone: 425-391-8329 ! Fax: 425-391-0446
web site: www.silicondesigns.com
[page 1]
Feb 08
ORDERING INFORMATION
Full Scale
Acceleration
Accelerometer
Model
Number
Cable
Length
Cable
Model
Number
± 2 g
2240-002
4 ft
2240-CAB-04
± 5 g
2240-005
14 ft
2240-CAB-14
± 10 g
2240-010
33 ft
2240-CAB-33
± 25 g
2240-025
50 ft
2240-CAB-50
± 50 g
2240-050
±100 g
2240-100
±200 g
2240-200
SILICON DESIGNS, INC
Model 2240
ANALOG ACCELEROMETER MODULE
!
!
!
! Hermetically Sealed Titanium Case
!
!
!
! Detachable Cable (sold separately)
!
!
!
! Capacitive Micromachined
!
!
!
! Nitrogen Damped
!
!
!
! ±4V Differential Output or
0.5V to 4.5V Single Ended Output
!
!
!
! Fully Calibrated
ACTUAL SIZE
!
!
!
! Low Power Consumption
(CABLE SOLD SEPARATELY)
!
!
!
! -55 to +125EEEEC Operation
!
!
!
! +9 to +32V DC Power
!
!
!
! Simple Four Wire Connection
!
!
!
! Low Impedance Outputs Will Drive
Up To 50 Feet of Cable
!
!
!
! Responds to DC and AC Acceleration
!
!
!
! Non Standard g Ranges Available
!
!
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! Low Noise
!
!
!
! Serialized for Traceability
DESCRIPTION
The model 2240 accelerometer is a hermetically sealed version of the model 2220. This rugged module combines
an integrated model 1221L accelerometer with high drive, low impedance buffering for measuring acceleration in
commercial/industrial environments. It is tailored for zero to medium frequency instrumentation applications. The
titanium case is sealed using a laser welding process and is easily mounted via two #4 (or M3) screws. On-board
regulation is provided to minimize the effects of supply voltage variation. It is relatively insensitive to temperature
changes and gradients. A model 2240-CAB cable, sold separately (see order information above), connects via a
miniature 4-pin screw-on connector. The cable’s shield is electrically connected to the titanium case while the ground
(GND) wire is isolated from the case. An initial calibration sheet (2240-CAL) is included and periodic calibration
checking is available.
OPERATION
The Model 2240 accelerometer module produces two analog voltage outputs which vary with acceleration as shown
in the graph on the next page. The sensitive axis is perpendicular to the bottom of the package, with positive
acceleration defined as a force pushing on the bottom of the package. The signal outputs are fully differential about
a common mode voltage of approximately 2.5 volts. The output scale factor is independent from the supply voltage
of +9 to +32 volts. At zero acceleration the output differential voltage is nominally 0 volts DC; at ±full scale
acceleration the output differential voltage is ±4 volts DC respectively.
APPLICATIONS
! FLIGHT TESTS
! VIBRATION MONITORING
! VIBRATION ANALYSIS
! MACHINE CONTROL
! MODAL ANALYSIS
! ROBOTICS
! CRASH TESTING
! INSTRUMENTATION
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