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 3]
Jan 08
Model 2430 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 2430'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 2430 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 2430 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 +VS 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 1000
so
use the following equations to calculate values for the resistors depending upon your supply voltage V
P.
R
V
V
LOWER
P
P
=
⋅
−
1000
5
R
R
V
UPPER
LOWER
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
2430x-002
2430x-005
2430x-010
2430x-025
2430x-050
2430x-100
2430x-200
UNITS
Input Range (single supply mode)
± 1.6
± 4
± 8
± 20
± 40
± 80
± 160
g
Sensitivity
2500
1000
500
200
100
50
25
mV/g
Output Range (single supply mode)
8V (+1 to +9V)
Volts
A custom version of the model 2430 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.
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