Product Highlights

• Interfaces to 100Ω Through 10kΩ Full-, Half-, or Quarter-Bridge Strain Gages
• High Level Voltage Outputs
• 1500Vrms Transformer Isolation
• ANSI/IEEE C37.90.1-1989 Transient Protection
• Input Protected to 240VAC Continuous
• Fully Isolated Excitation Supply
• 160dB (Narrow BW) or 100dB (Wide BW) CMR
• 4 Hz (Narrow) or 10k Hz (Wide) Signal Bandwidth
• ±0.08% Accuracy
• ±0.02% Linearity
• ±1µV/°C Drift
• CSA Certified

Each DI-5B38 strain gage input module provides a single channel of strain gage input which is filtered, isolated, amplified, and converted to a high level analog voltage output. This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.

The DI-5B38 module is designed with a completely isolated computer side circuit which can be floated to ±50V from power common (pin 16). This complete isolation means that no connection is required between I/O common and power common for proper operation of the output switch.

The DI-5B38 can interface to full- or half-bridge transducers with a nominal resistance of 100Ω to 10kΩ. A matched pair of bridge-completion resistors (to ±1mV at +10V excitation) allows use of low cost half- or quarter-bridge transducers. On wide bandwidth modules, the 10kHz bandwidth allows measurement of high speed processes such as vibration analysis.

Strain gage excitation is provided from the module by a very stable 10V or 3.333V source. The excitation supply is fully isolated, allowing the amplifier inputs to operate over the full range of the excitation voltage. Full scale sensitivities of 2mV/V, 3mV/V, or 10mV/V are offered. With 10V excitation, this results in a ±20mV, ±30mV, or ±100mV full scale input range.

On wide bandwidth modules, the input signal is processed through a pre-amplifier on the field side of the isolation barrier. This pre-amplifier has a gain-bandwidth product of 5MHz and is bandwidth limited to 10kHz. On all modules, after the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

A special input circuit on the DI-5B38 provides protection of the signal inputs and the isolated excitation supply up to 240VAC.

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Ordering Information, Models, and Prices

Part Number	Input Bridge Type	Input Range (Ohms)	Excitation	Price (US)	DATAQ Store
DI-5B38-01 Wide BW	Full	100 to 10k	3.333V @ 3mV/V	$180	Quantity:
DI-5B38-31 Narrow BW	Full	100 to 10k	3.333V @ 3mV/V	$180	Quantity:
DI-5B38-02 Wide BW	Full	300 to 10k	10V @ 3mV/V	$180	Quantity:
DI-5B38-32 Narrow BW	Full	300 to 10k	10V @ 3mV/V	$180	Quantity:
DI-5B38-03 Wide BW	Half	100 to 10k	3.333V @ 3mV/V	$180	Quantity:
DI-5B38-33 Narrow BW	Half	100 to 10k	3.333V @ 3mV/V	$180	Quantity:
DI-5B38-04 Wide BW	Half	300 to 10k	10V @ 3mV/V	$180	Quantity:
DI-5B38-34 Narrow BW	Half	300 to 10k	10V @ 3mV/V	$180	Quantity:
DI-5B38-05 Wide BW	Full	300 to 10k	10V @ 2mV/V	$180	Quantity:
DI-5B38-35 Narrow BW	Full	300 to 10k	10V @ 2mV/V	$180	Quantity:
DI-5B38-06 Wide BW	Full	100 to 10k	3.333V @ 10mV/V	$180	Quantity:
DI-5B38-36 Narrow BW	Full	100 to 10k	3.333V @ 10mV/V	$180	Quantity:
DI-5B38-07 Wide BW	Full	300 to 10k	10V @ 10mV/V	$180	Quantity:
DI-5B38-37 Narrow BW	Full	300 to 10k	10V @ 10mV/V	$180	Quantity:
Accessories	Backplanes and Power Supplies.			N/A	Go to Accessories

Note: Pricing outside the U.S. will be higher to account for shipping, taxes, duty, currency fluctuation, local warranty and technical support in your country.
DI-5B Signal Conditioners have typical lead times of 2 weeks ARO.
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Knowledge Base and Common Support Issues

The Importance of Isolation

Dimensions and Pinout

Pass-through connections to jump a 5B module socket

How To Calibrate Strain Gage-Based Transducers Using DI-5B38 Strain Amplifiers

Strain Gage-Based Transducer and Amplifier Selection and Calibration

How To Choose Strain Gage-based Transducers for PC-based Data Acquisition Applications

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