LVDT signal conditioner to provide DC output

14th May 2019
Alex Lynn

It has been announced that the NTC-6000 LVDT Signal Conditioner from NewTek Sensor Solutions pairs with nearly any AC-operated LVDT, RVDT or LVRT half bridge to deliver reliable position feedback in four to 20mA, zero to five volts, zero to ten volts, or RS-485 formats for process control systems requiring digital output. 

DC-operated position sensors cannot perform reliably in industrial applications with harsh environments. Void of internal electronics, AC-operated sensors operate with higher accuracy and longevity in areas with high temperatures, vibration and shock. But they cannot provide digital output on their own.

Configurable with LVDTs, RVDTs and VR half bridge position sensors, the NTC-6000 LVDT Signal Conditioner converts unconditioned position feedback from AC-operated sensors to digital output for use by PLCs, data acquisition systems, data loggers and more.

In operation, operators can connect the NTC-6000 up to 100 feet away from an AC-operated sensor that remotely operates in the extreme environments of an application. For example, the AC-LVDT could be installed on a packaging line with extreme vibrations and shock, verifying critical dimensions, roller or tension arm location, or product flatness while the signal conditioner can be mounted remotely in a benign location. 

As the AC-operated LVDT Linear Position Sensor does not contain any internal electronics, it requires external excitation. The NTC-6000 LVDT Signal Conditioner provides that AC excitation while retrieving the sensor’s unconditioned position output for conversion into analog or digital output that is communicated to a control system. For multiple sensor requirements, units digitally communicate with up to 16 devices simultaneously and are connectable in a master/slave configuration. 

NTC-6000 LVDT Signal Conditioner realises the full benefit of using AC-LVDTs in a variety of applications including factory automation, material testing, turbine control systems, steam valve positioning, packaging equipment and gauging. 

The signal conditioner features:

  • Quick and easy setup with front panel push buttons and LED indicators.
  • Selectable excitation frequency, analog outputs and bandwidth.
  • Automatic excitation synchronisation for multiple unit systems reducing or eliminating cross-talk between sensors.
  • Self-diagnostics for LVDT failure, disconnect, or short circuit.
  • Digital communications via RS-485 two-wire multi-drop bus.
  • Hot swapability - setup can be saved and reloaded via RS-485 port.
  • Cyber security lockout and tamper detect.

Flexible design gives users the option to receive one of several DC outputs including voltage ranges, four to 20mA current, or RS-485 digital. Developed in-house by NewTek Engineering, the NTC-6000 is available in-stock for quick delivery.

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