OMEGA

DMD-475 Isolated Strain Amplifier

Isolated Signal Conditioners with Transducer Power up to 120 mA for Strain Gages, Load Cells and Transducers

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DMD 475 Isolated Strain Amplifier 12952

 The DMD-470 Series bridge amplifiers are ac powered signal conditioning modules with triple isolated voltage or current outputs for load cells, bridge type sensors and strain gages. Both models have dual zero/tare functions. Zero is used for normal bridge balance and the tare feature allows up to 68% of the input to be offset and still achieve full output span. The DMD-475 has an isolated voltage output; the DMD-476 is similar, but has an isolated 4 to 20 mA output. Both models have input ranges of 5 to 50 mV for a full scale output (0-10 V or 4-20 mA).

 
• 700 V I/O Isolation
• 1100 V Line Isolation
• Power for Four 350 Ohm Load Cells, Fixed 10 V or Variable 5 to 10 Vdc
• Adjustable Gain and Offset
Response Time10 to 90% = 35 ms
Dynamic ResponseDC to -3 dB = 10 Hz, 2 pole
Compliance Voltage-1 to 20V
Output Range4 to 20 mA or 0 to 20 mA
Output Zero Adjust0 or 4 mA
Common-Mode Input Voltage5V
Common-Mode Rejection100 dB
Input Impedance1000 MΩ
Tare Adjustment-3 to 25 mV equals 80% of 3 mV/V cell
Temperature Stability0.005%/°C
Zero Adjust0 to ±12 mA
Linearity±0.01%
Input Range for 16 mA Span5 mV min, 50 mV max
Output4 to 20 mA, 0 to 20 mA
DMD-476 (4 to 20 mA Transmitter)
Response Time10 to 90% = 35 ms
Dynamic ResponseDC to -3 dB = 10 Hz, 2 pole
Output Current5 mA maximum
Output Range-3 to 10 Vdc
Output Zero Adjust0 to 2V
Input Resistance1000 MΩ
Tare Adjustment-3 to 25 mV
Temperature Stability0.005%/°C
Linearity±0.005% FS
Input Range for 10V Output5 to 50 mV
Gain Range200 to 2000
DMD-475 (Voltage Output)
Temp Coefficient60 ppm @ 10V, 100 ppm max
Output Noise1 mVrms max (120 Hz)
Line and Load Regulation0.02% max
Current Output120 mA max
Voltage Range5 to 10 Vdc
Bridge Supply
Size96 L x 51 W x 73 mm H (3.75 x 2 x 2.87')
Weight510 g (18 oz)
Storage Temperature-25 to 85°C (-13 to 185°F)
Operating Temperature-25 to 55°C (-13 to 131°F)
Input to Output700 Vdc and 60 pF
AC Line1100 Vrms, 60 pF
Isolation
Power115 Vac ±10 Vac standard or 220 Vac ±10% 50/60 Hz optional
Common

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