LVDT Signal Conditioner DIN Rail Mounted S1A Series

For use in:

Steam Valve Position Feedback

Governor and Throttle Valves

Interceptor and Stop Valves

Boiler Feedwater Pumps

Turbine Control Systems

S1A

LVDT Signal Conditioner

Advanced Smart AC-LVDT Signal Conditioner Module

The S1A DIN-rail-mounting smart LVDT Signal Conditioner module from Alliance Sensors Group ends the difficulties that accompany AC-LVDT setup with built-in null indicators and front panel pushbuttons to set zero and full scale output. Engineered to work with the widest range of AC-LVDTs and inductive half-bridge LVRTs, the S1A module offers a choice of 4 excitation frequencies and 8 analog outputs, operates LVDT sensors with over a 40 dB dynamic range of AC output, indicates most common system failures, and incorporates a 2-wire RS-485 digital communications port. Along with color-coded plug-in screw terminal connectors and a 2 year warranty, these are just a few of the many advanced features that make Alliance Sensors Group’s S1A module a truly superior smart LVDT signal conditioner.

Features

Smart setup with front panel push buttons --- no pots, no calculations
Built-in null indication --- front panel LEDs and DC null voltage output
Auto-mastering provides fail-safe excitation syncing for multiple units
Self-diagnostics for LVDT failure or disconnect; open-collector output
Half-duplex digital communications via RS-485 2-wire multi-drop bus
Hot swapability --- setup can be saved and reloaded via RS-485 port

Options

USB to RS485 cable

Specifications

Operating Power:	+15 to +30 V DC (+24 V nominal), 60 mA max. at 24 V DC; +15 V DC and -15 V DC needed for ±10 V DC bipolar output
Excitation Voltage:	3.0 Vrms (nominal) push-pull drive (factory default) 4.5 Vrms (nominal) push-pull drive (via jumper change) 1.5 Vrms (nom) single ended drive (for low impedance primary)
Excitation Frequencies:	1 kHz, 3 kHz, 5 kHz, 10 kHz (nominal)
Auto-Master Syncing:	Master output couples up to fifteen slave units; if master fails, new master is automatically generated for fail-safe excitation
LVDT AC Output Range:	50 mVrms to 5000 mVrms at LVDT ís full scale position
Analog DC Outputs:	0 - 5 V, 1 - 5 V, 0.5 - 4.5 V, 0.5 - 9.5 V, 0 -10 V, -10 to +10 V, 0 -20 mA sourcing, 4 -20 mA sourcing
Loop Resistance:	850 Ohms max. with 24 V DC supply
Output Non-Linearity:	±0.025% of Full Span Output (FSO)
-3 dB Response:	10% (minimum) of excitation frequency (normal setting); 10 Hz (default) user adjustable (low noise setting)
Noise and Ripple:	≤2.5 mVrms (voltage output); ≤5 μArms (current loop output)
Fault Detection:	Open LVDT winding, cable disconnected, loss of excitation
Failure Indication:	Flashing LED's; analog output out of range; open-collector switch
Null Detection:	Front panel LEDs
Null Output Signal:	Up to +/-3VDC
Operating Temperature:	0 to 75 C
Temperature coefficient:	+/-0.002% of FSO/C (combined zero and span shift)
Zero Set:	Front panel push button or RS-485 command
Full Scale Set:	Front panel push button or RS-485 command
Digital Interface:	RS-485 2-wire multi-drop network, 16 addresses

Configuration Information

S1A Datasheet

S1A & SC-100 RS485 quick start

S1A Operating Manual

Downloadable GUI Software for S1A or SC-100

All dimensions and specifications are nominal. With our policy of on-going development and design improvements, specifications may change without notice. Modifications may affect some or all of the mechanical electrical and or performance specifications of our product. Please make sure to contact us for the most up to date information.

Our Technical Support Staff: We have more than 150 years and three generations in the position sensor business and are expert application engineers at what we sell. We have real world experience and know how to solve your measurement challenges. Need help technical help with your measurement application? Call us today 856-727-0250.

Our Web Site: We are constantly improving our website and adding new sensors to our product offerings.

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LVDT Signal Conditioner DIN Rail Mounted S1A Series

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