Portable, Modular Signal Conditioning Modules
Overvoltage protection ....................... ±28 Vp (powered on or off)
Input impedance ................................. 10 MΩ powered on, 10 kΩ
powered off or overload
Gain error ............................................ ±0.8ꢀ of reading maximum
Offset error.......................................... ±5 µV
NI SCC-SG Series Strain Gage
Input/Excitation
Bandwidth........................................... 1.± kHz (single-pole RC filter)
Excitation voltage ............................... 2.5 V ±0.4ꢀ
Excitation Current Drive
SG01, SG02......................................... 42 mA (with 2 120 Ω gages)
SG03, SG04......................................... ±0 mA (with 2 350 Ω gages)
Excitation drift..................................... 13 mV/°C
Power Requirements
Model
Channel
Description
Part Number
777459-13
777459-14
777459-15
777459-1±
777459-17
777459-37
Analog................................................. 143 mW
Digital.................................................. 210 mW
SCC-SG01
SCC-SG02
SCC-SG03
SCC-SG04
SCC-SG11
SCC-SG24
2
2
2
2
2
2
120 Ω, quarter-bridge strain gages
350 Ω, quarter-bridge strain gages
Half-bridge strain gages
Full-bridge strain gages
Shunt calibration
Full-bridge strain gages, load cells,
pressure sensors, torque sensors
SCC-SG11
Number of channels............................
2
Control signal...................................... 1 DIO channel
Resistor for each channel................... 301 kΩ ±1ꢀ, socketed
Resistor temperature coefficient........ ±100 ppm/°C
The National Instruments SCC-SG Series consists of dual-channel strain
gage modules for conditioning quarter, half, and full-bridge strain gages
and a calibration module. Each module is designed for a specific type of
bridge configuration. Each channel of an NI SCC-SG module (except
SCC-SG11) includes an instrumentation amplifier, a 1.± kHz lowpass
filter, and a potentiometer for bridge-offset nulling. Each SCC-SG0x
module also includes a single 2.5 V excitation source. The SCC-SG24
has a 10 V excitation source for load cells and pressure sensors.
The SCC-SG11 is a dual-channel shunt calibration module for use with
the SCC-SG0x and SCC-SG24 modules. Each channel includes two
terminals for wiring a switched 301 kΩ, 1 percent, 1⁄4 W resistor across
any two points of your bridge. You enable shunt calibration for both
channels of a module by writing a logic high to the digital line controlling
the SCC-SG11. You disable shunt calibration by writing a logic low to the
same digital line.
Power Requirements
Digital.................................................. 25 µW
SCC-SG24
Input Characteristics
Number of channels............................ 2 differential
Input signal range............................... ±100 mV
Output signal range ............................ ±10 V
Gain .................................................... 100
Overvoltage protection ....................... ±42 VDC powered on and
powered off
Input impedance ................................. 20 MΩ powered on >±0 kΩ
powered off or overload
Gain error ............................................ ±0.20ꢀ of reading max
Offset error.......................................... ±50 µV typ, 325 µV max before
calibration1
Bandwidth........................................... 1.± kHz single-pole buffered RC
filter
Excitation voltage ............................... 10 V ±0.05ꢀ
Excitation current drive....................... ±0 mA, based on two full-bridge
350 Ω strain gages
When you install an SCC-SG module in the SC-2345, the carrier routes
the strain gage signals to two input channels of the multifunction DAQ
device, channels x and x+8, where x is 0 through 7.
Specifications
SCC-SG0x
Excitation drift..................................... 10 ppm/°C
Power Requirements
Analog................................................. 340 mW
Digital.................................................. 930 mW
Input Characteristics
Number of channels............................ 2 differential
Input signal range............................... ±100 mV
Output signal range ............................ ±10 V
Gain .................................................... 100
1By factory default, the nulling resistors are not installed in the SCC-SG24. See the user
manual for information on installing the nulling resistors.
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
6
NI [ National Instruments ]
