Controllers get to grips with LVDT applications

Edited by the Engineeringtalk editorial team Mar 18, 2005

Macro Sensors has released two new six-digit, dual channel controllers for applications involving LVDT-based displacement transducers or VR half-bridge gauging probes.

Macro Sensors has released two new six-digit, dual channel controllers for applications involving LVDT-based displacement transducers or VR half-bridge gauging probes.

Economically priced, the DMC-A2 dual channel AC-LVDT controller and DMC-D2 dual channel DC-LVDT controllers perform arithmetic calculations between two channels for TIR measurements or differential measurement for use in production lines to automatically gauge products for quality control and product sorting.

In the power generation and petrochemical industries, these controllers can be used to provide servo position feedback on actuated equipment such as valves and dampers, or for measuring turbine case expansion.

The NEMA-4 front panel allows units to be used in marine and offshore mining applications.

Offering user-friendly operations, the digital controllers incorporate a scrolling display that actively prompts users to input information into the unit during specific setup stages.

Users can also view and program data to the controller through a computer using a GUI via RS232 or TCP/IP communications.

Both the DMC-A2 and DMC-D2 dual channel controllers feature: internal signal conditioning to provide the proper voltage for operating LVDTs; four independently programmable setpoints with eight selectable functions; microprocessor-based logic for digital position indication, linearisation and crosschannel maths functions, input averaging and digital filtering, high/low limit detection; scalable analogue output for use with data loggers, PLCs and computers; six-digit, scrolling 14 segment adjustable alphanumeric display; RS232 communications port standard for remote software setup and RS232 output (with optional TCP/IP network capability; four independently programmable setpoints and four 5A relays with eight selectable functions and six alarm status annunciators; and power is standard 120V AC or optionally 24V DC.

The DMC-A2 digital controller is provided with a standard analogue output of DC voltage, optional scalable milliamp output or dual DC voltage outputs.

The DMC-D2 dual channel DC-LVDT controller provides proper voltage for operating any standard DC-LVDT.

The DC LVDT input module of the DMC-D2 meters is designed to drive the signals for two DC-LVDT transducers.

Both models are single or dual 16bit isolated programmable and offer a RS232 communications port standard for use with data loggers, PLCs and computers.

Five 4A relays provide automatic output to external controls.

Units can be fitted on a panel or used as tabletop instruments.

An optional TCP/IP network capability supports multichannel applications by permitting the interface of multiple units within an automation system.

Priced substantially lower than competing units, the DMC-A2 dual channel AC-LVDT controllers are priced at $925 per single unit, and the DMC-D2 units are priced at $975.00 each.

Quantity discounts are available.