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AC-LVDT Signal Conditioner offers broad compatibility.

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November 27, 2012 - Engineered to work with AC-LVDTs, RVDTs, and inductive half-bridge sensors, S1A DIN rail module supports LVDT operation and indicates most common failures. Built-in null indication and front panel pushbuttons, used to set zero and full scale, accelerate intelligent LVDT setup, while internal MPU eliminates need to calculate jumper connections for gain, range, etc. Conditioner offers choice of 4 excitation frequencies, 8 analog DC outputs, and RS-485 digital communications.

Alliance Sensors Group Introduces World's Most Advanced AC-LVDT Signal Conditioner


(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

Alliance Sensors Group
102 Commerce Dr. Unit 8
Moorestown, NJ, 08057
USA



Press release date: November 21, 2012

S1A DIN rail module reduces setup to just minutes while offering digital communications

Moorestown, New Jersey … Alliance Sensors Group introduces the S1A AC-LVDT Signal Conditioner that offers smart and fast LVDT setup with built-in null indication and simple front panel pushbuttons to set zero and full scale.  Engineered to work with the widest range of AC-LVDTs, RVDTs and inductive half-bridge sensors including 3-wire GE LVRTs and GE gas turbine LVDTs with the buck-boost, the S1A DIN rail module supports LVDT operation and indicates most common failures.

The S1A offers a choice of 4 excitation frequencies, 8 analog DC outputs (6 DC voltage and 2 current loop outputs) and RS-485 digital communications.  Ideal applications for the S1A module include turbine control systems, steam valve position feedback, and other types of redundant control systems that use LVDT position sensors.

In the past, AC-operated LVDT linear and rotary position sensors were difficult to calibrate as traditional signal conditioners require operators to use trimmer pots.    With the S1A AC-LVDT Signal Conditioner, the internal microprocessor eliminates the need to calculate jumper connections for gain, range, etc. The operator simply finds null, then moves the LVDT core to one end of the range and presses the zero button. Once set, the LVDT core is moved to the other end of a specified range and the full scale button is pressed.  The S1A is fully calibrated with the position sensor.

“The S1A works with about 98% of AC-operated LVDTs on the market, including GE gas turbine LVDTs,” notes John Matlack, VP of Sales and Marketing, Alliance Sensors Group. “With its built-in null indicator and smart setup with two front panel push buttons, the S1A AC-LVDT Signal Conditioner can calibrate LVDTs 4 to 20x faster than traditional  signal conditioners.”

In the event of a failure, a new S1A DIN rail module can be “hot swapped” into an existing installation, with initial calibration data saved then reloaded via RS-485 port.  Standard signal conditioners would require a full calibration. Through the digital communications link, the S1A also can be setup remotely using a computer, which simplifies operations if the unit is already installed on a DIN rail in a cabinet.

For installations where there are multiple position sensors, the S1As can be master/slaved to prevent cross talk between sensor signals. Should a master fail, standard signal conditioners will revert back to their own oscillators, opening them to the cross talk the master/slave configuration was designed to prevent. If the S1A master fails, the first slave becomes the new master for the other slaves.

Other significant features of the S1A include:
- Color coded plug-in connections
- Self-diagnostics for LVDT winding failures or cable disconnection. 
- Detected output errors drive analog outputs out of range, which is especially important for applications using redundant LVDTs
- Extended two year warranty offers value to systems integrators who buy units long before they are put into use

For more information on the S1A AC-LVDT Signal Conditioner, please refer to the web site at http://www.alliancesensors.com/lvdt-signal-conditioner-din-rail-mounted-s1a-series or contact the factory at sales@alliancesensors.com

About Alliance Sensors Group
Headquartered in Moorestown, New Jersey,  Alliance Sensor Group (http://www.alliancesensors.com/) is an LVDT and RVDT sensor manufacturing company offering engineering and application support in solving specific measurement challenges within the power generation, fluid power and manufacturing  industries. Combining more than 150 years of sensors experience, our technical and application support staff have extensive experience in providing the right sensor for challenging rotary and linear position measurement applications.
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