3B17

Isolates, amplifies, & filters signals from 4-, 5, or 6-wire Linear Variable Displacement Transformers (LVDTs). Isolates, amplifies, & filters signals from Rotary Variable Displacement Transformers (RVDT). Provides an AC excitation voltage of 1V rms to 5V rms at frequencies between 1 kHz and 10kHz. Module circuitry can withstand 130v rms at the input screwterminals.
All 3B17 series modules are mix-and-match and Hot Swappable.

Industrial signal amplification Industrial signal isolation Industrial signal filtering

The 3B17 is a wide-bandwidth single-channel signalconditioning module which isolates, amplifies, and filters signals from 4-, 5-, or 6-wire Linear Variable Displacement Transformers (LVDTs) or Rotary Variable Displacement Transformers (RVDT). The 3B17 input module provides an AC excitation voltage of 1V rms to 5V rms at frequencies between 1 kHz and 10 kHz. All gain and zero suppression can be usercalibrated by screwdriver adjustments through the sliding door on the top of the module. Gain can vary over an extensive 256:1 range by adjusting a combination of a rotary switch and trim potentiometer. Zero suppression can vary over +5V from the center setting. The current output can be independently adjusted over a +5% range for zero and span. In addition, the 3B17 is mix-and-match and hot-swappable with all 3B Series modules, so it can be inserted or removed from any socket in the same backplane without disrupting system power.

3B Series Custom-Ranging Program Externallyprogrammable Model 3B17-00, and 3B17-D-00, enable the user to configure a special input range, excitation voltage and excitation frequency by using the optional plug-on AC1310 ranging card, which houses user-supplied resistors to determine excitation voltage amplitude and frequency. To facilitate selecting resistors, a Windows program, 3B-CUSTOM, calculates resistor values based on the user-desired input/output ranges and AC excitation.

The 3B17 input and AC excitation output terminals are protected for up to 130V rms, protecting the computer side from damage due to field-side over-voltage faults. The LVDT input signal is amplified to give the high level output voltage. The 3B17 automatically compensates for phase errors between the primary and secondary of the LVDT or RVDT, eliminating the need for a phase adjustment and automatically rejects any residual quadrature voltages via a unique approach to error compensation which uses the sum of the two secondary winding to directly drive the demodulator. The amplitude and frequency of the AC excitation can be factory configured to meet custom needs (Model 3B17-Custom) or externally configured (Models 3B17-00 and 3B17-D-00) with the optional  AC1310 plug-on custom ranging card.