Sensorex
SIGNAL CONDITIONER FOR STRAIN GAUGE WITH
THRESHOLD, DIN HOUSING SERIES 3320
DESCRIPTION
The 3320 model is a signal conditioner for strain gauge which can accept very low
bridge resistance values ( 80 ohm).Gain and zero can be easily regulated by dip-switch
and potentiometer. Excitation can be either 5 or 10 volts.
Output is available in several formats : 0/10 V, ± 10 V or 4/20 mA. The bridge can be
hooked up in either 4 or 6 wire configuration.
6 wire configuration will avoid any voltage loss between supply and the strain gauge
due to long cable length.
The 3320 module will also detect threshold limits, wire break of the sensor and supply
loss. Failure signal is given through a relay.
Two different thresholds can be easily set by potentiometers accessible from the front
of the unit.
This industrial unit come in a PA PHOENIX polyamide housing, EM type, and can be
clipped onto any DIN EN line (norm EN 50022).
GENERAL SPECIFICATIONS
Supply voltage
Bridge excitation
Signal output
Bridge connection
BLOCK DIAGRAM
Voltage Reference 5/10V
24 VDC
5 or 10 VDC
0-10 V, ± 10 V or 4 – 20 mA
4 or 6 wire
DIMENSIONS
Power Supply
24 V +/-8 V
Power Supply
16/32 V
High threshold
measurement
Zero
Gain
Ampli + Filter
High threshold
Low threshold
Output Interface
Low threshold
measurement
0/10V output or
+/-10V output
4/20 mA Output
TOR
C
NO NF
Relay in default state
E00281A
MECHANICAL SPECIFICATIONS
Mounting
Dimensions
Housing material
Connection
Protection index
Flammability
Vibration
Weight
Working temperature
Storage temperature
Warm up time
126
01/09 SX3320 GB 1/2
X90211-Int 2C cata Senso GB 08.indd 126
DIN EN 50022 profile
115 x 100 x 23 mm
Polyamide PA
Screw terminal
IP 20
VO (ULGA 94)
2 G (white noise)
Approx 130 g
0 °C to 70 °C
- 40 °C to + 85 °C
15 minutes
International Business Park • Archamps • F-74166 Saint-Julien-en-Genevois
Tel. (+33) 450 95 43 70 • Fax (+33) 450 95 43 75 • Email : sensorex@fr.meggitt.com • Web : www.sensorex.fr
02/03/09 12:20:09
Sensorex
Power supply
Voltage 24 V dc
Consumption
Bridge excitation
Strain gauge
Impedance
INTRODUCTION - GENERAL SUMMARY
ELECTRICAL CHARACTERISTICS
24 ± 8 VDC
200 mA max
5 or 10 VDC
80 Ω at 5 V
120 Ω at 10 V
0,3 at 12 mV/V
Sensibility
Input
Current
Impedance
Gain
- Maximum
- Minimum
Zero
- Maximum for impedance of 120 Ohm
Filter (3rd order)
- Maximum
- Minimum
Voltage output
Maximum non-linearity of FS
Output
Current output
Maximum non-linearity
Impedance
Load resistance
Thermal drift (± 10 V)
Input offset
Sensitivity
5 nA
1010 Ohm typ.
8500
80
INERTIAL SENSORS AND SYSTEMS
± 3,25 mV/V
5000 Hz ± 10 %
3 Hz ± 10 %
0,001 % of FS for Gain = 1000
0-10 V or ± 10 V
4-20 mA
± 0,015 % of FS
40 MΩ typ.
800 Ω max
(± 0,2 ± 5/Gain) µV/°C typ.
150 ppm/°C signal
RELAY CHARACTERISTICS
DISPLACEMENT SENSORS
The 3320 has an active fault detection by relay of the following :
- Threshold overshoot
- Open circuit on sensor wire
- Loss of power supply to the conditioner
Type :
Unipolar inverter switch (1RT)
Max current consumption :
2A
Maximum switching voltage :
230 VDC, 250 VAC
Max switching power :
60W 62.5 VA
WIRING DIAGRAM
0/10 V or
+/- 10 V
RL
IS
+A
+S
-S
-A
9
+V
14
NO
13
Gnd
15
C
11
Vout
16
NF
12
Gnd
10
Iout
12
Gnd
4
+Vexc
1
IN-
8
-Vexc (Gnd)
5
IN+
4 wires connection (standard)
16/32 V
0/10 V or
+/- 10 V
RL
IS
+A
+S
-S
-A
9
+V
14
13
Gnd
15
C
11
Vout
16
NF
12
Gnd
10
Iout
12
Gnd
4
3
+Vexc
+Vreg
1
IN-
7
8
-Vreg
-Vexc (Gnd)
5
IN+
6 wires connection
NO
E00282B
½ bridge and ¼ bridge configurations also possible.
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01/09 SX3320 GB 2/2
X90211-Int 2C cata Senso GB 08.indd 127
International Business Park • Archamps • F-74166 Saint-Julien-en-Genevois
Tel. (+33) 450 95 43 70 • Fax (+33) 450 95 43 75 • Email : sensorex@fr.meggitt.com • Web : www.sensorex.fr
ELECTRONICS AND MICROELECTRONICS
16/32 V
02/03/09 12:20:18