2440-002 Datasheet, PDF (3/3 Pages) List of Unclassifed Manufacturers – TRIAXIAL ANALOG ACCELEROMETER MODULE

Model 2440 Triaxial Analog Accelerometer Module
CABLE SPECIFICATIONS & LENGTH CONSIDERATIONS
The cable consists of six 28 AWG (7x36) tin plated copper wires with FEP insulation. The cable jacket is an FEP tape wrap
with a nominal outer diameter of 0.125”. Cable lengths of up to 15 meters (50 feet) can be added to the model 2440's
standard 1 meter cable without the need to test for output instability. For lengths longer than 15 meters we recommend
you check each individual installation for oscillation by tapping the accelerometer and watching the differential output for
oscillation in the 20kHz to 50kHz region. If no oscillation is present then the cable length being used is OK. From the
standpoint of output current drive and slew rate limitations, the model 2440 is capable of driving over 600 meters (2000
feet) of its cable type but at some length between 15 and 600 meters, each device will likely begin to exhibit oscillation.
SENSOR LOCATIONS
SINGLE SUPPLY OPERATION
The model 2440 can be powered using a single +20 to +32V supply but two additional resistors are needed and you must
make the following connections. Connect the -V_S wire to your power supply’s ground. Connect the +V_S wire to the positive
output of your power supply V_P. Connect one resistor (R_UPPER) between your supply voltage and the OUTPUT REF wire.
Connect another resistor (R_LOWER) between ground and the OUTPUT REF wire. The two resistors form a resistive divider
which creates a +5V source for OUTPUT REF. This +5V reference needs to have a source impedance of about 1000Ω so
use the following equations to calculate values for the resistors depending upon your supply voltage V_P.
R
LOWER
=
1000 ⋅ V_P
V
P
−
5
R
UPPER
=
R
LOWER

V
P
−
5
5_{}
For this mode of operation, the voltage swing of the three outputs is limited to 8V (+1 to +9V) so the g-range over which
each model will operate is reduced according to the table below.
MODEL NUMBER
2440x-002 2440x-005 2440x-010 2440x-025 2440x-050 2440x-100 2440x-200
Input Range (single supply mode) ± 1.6
±4
±8
± 20
± 40
± 80 ± 160
Sensitivity (single supply mode)
2500 1000
500
200
100
50
25
Output Range (single supply mode)
8V (+1 to +9V)
UNITS
g
mV/g
Volts
A custom version of the model 2440 that can operate with a single supply as low as 12V can be special ordered but a
custom order charge may apply for quantities less than 10.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Silicon Designs, Inc. ! 1445-NW Mall Street, Issaquah, WA 98027-5344 ! Phone: [phone] ! Fax: [phone]
web site: www.silicondesigns.com
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Sep 07