DI–720/DI–722/DI–730 Series User ManualAccessories65DI-8B38 Strain Gage Input Modules, Narrow & Wide BandwidthEach DI-8B38 module isolates, filters and amplifies a full-bridge strain gage input signal and provides an analog volt-age output.The 8B38 can interface to transducers with a nominal resistance of 100 to 10k. Bridge excitation is provided from themodule 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 provides100dB per decade of normal-mode rejection above the filter cutoff frequency. One pole of this filter is on the fieldside 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 volt-ages 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 ispowered from +5VDC, ±5%.Ordering InformationMODEL BANDWIDTH INPUT RANGE EXCITATION OUTPUT RANGEDI-8B38-01 3kHz -10mV to +10mV 3.333V at 3mV/V Sensitivity -5V to +5VDI-8B38-02 3kHz -30mV to +30mV 10.0V at 3mV/V Sensitivity -5V to +5VDI-8B38-05 3kHz -20mV to +20mV 10.0V at 2mV/V Sensitivity -5V to +5VDI-8B38-31 3Hz -10mV to +10mV 3.333V at 3mV/V Sensitivity -5V to +5VDI-8B38-32 3Hz -30mV to +30mV 10.0V at 2mV/V Sensitivity -5V to +5VDI-8B38-35 3Hz -20mV to +20mV 10.0V at 2mV/V Sensitivity -5V to +5V
