DI-8B38 Strain Gage Input Modules

Wide (8kHz) and Narrow (3Hz) Bandwidth

Product Features

• Provides gain and excitation for strain gage-based transducers (load cells, pressure sensors, torque meters, etc.)
• Interfaces to 100Ω Thru 2kΩ Full-Bridge Strain Gages (model dependent)
• High Level Voltage Outputs
• 1500Vrms Transformer Isolation
• ANSI/IEEE C37.90.1 Transient Protection
• Input Protected up to 240VAC Continuous
• 100dB CMR
• 3Hz or 8kHz Signal Bandwidth
• ±0.05% Accuracy
• ±0.02% Linearity
• Low Drift with Ambient Temperature
• UL, CSA, FM and CE Certifications Pending
• Mix and Match Modules

Products in the Series

DI-8B38-01
Strain Gauge-based Sensor (Wide BW)
$ 170

• ±10 mV measurement range
• 100Ω to 2kΩ bridge resistance
• 8 kHz bandwidth
• 3.33 V excitation output

Go to Product Page

DI-8B38-02
Strain Gauge-based Sensor (Wide BW)
$ 170

• ±30 mV measurement range
• 300 Ω to 2kΩ bridge resistance
• 8 kHz bandwidth
• 10 V excitation output

Go to Product Page

DI-8B38-05
Strain Gauge-based Sensor (Wide BW)
$ 170

• ±20 mV measurement range
• 300 Ω to 2kΩ bridge resistance
• 8 kHz bandwidth
• 10 V excitation output

Go to Product Page

DI-8B38-31
Strain Gauge-based Sensor (Narrow BW)
$ 170

• ±10 mV measurement range
• 100Ω to 2kΩ bridge resistance
• 3 Hz bandwidth
• 3.33 V excitation output

Go to Product Page

DI-8B38-32
Strain Gauge-based Sensor (Narrow BW)
$ 170

• ±30 mV measurement range
• 300 Ω to 2kΩ bridge resistance
• 3 Hz bandwidth
• 10 V excitation output

Go to Product Page

DI-8B38-35
Strain Gauge-based Sensor (Narrow BW)
$ 170

• ±20 mV measurement range
• 300 Ω to 2kΩ bridge resistance
• 3 Hz bandwidth
• 10 V excitation output

Go to Product Page

DI-8B modules are an optimal solution for monitoring real-world process signals and providing high level signals to a data acquisition system. Each DI-8B38 module isolates, filters and amplifies a full-bridge strain gage input signal and provides an analog voltage output.

The 8B38 can interface to tranducers with a nominal resistance of 100Ω to 2kΩ depending upon the model. Bridge excitation is provided from the module with a stable 10.00V or 3.33V source. Full scale sensitivities of 2mV/V and 3mV/V are offered as standard.

Signal filtering is accomplished with a five-pole filter optimized for time and frequency response which provides 100dB per decade of normal-moderejection above the filter cutoff frequency. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other four are on the system side.

A special input circuit on the DI-8B38 module provides protection against accidental connection of power-line voltages up to 240VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

Isolation is provided by optical coupling to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.