LVDT Signal Conditioner
Everight Sensors Corporation
102 Commerce Dr. Unit 8, Moorestown, NJ 08057
Phone: 856-727-9555, Fax: 856-727-9585
E-mail: contact@everightsensors.com
World's Most Advanced AC-LVDT Signal Conditioner

The Everight S1A DIN rail module ends the usual difficulties that accompany AC-LVDT set up with a built-in null indicator and simple front panel pushbuttons to set zero and full scale. Engineered to work with the widest range of AC-LVDTs and inductive half-bridges, the S1A module monitors LVDT operation and indicates any common failure. The S1A offers a choice of four excitation frequencies and eight analog DC outputs, as well as an RS-485 digital communications port. These features make the Everight S1A the world leader in AC-LVDT signal conditioning…
  • Smart setup with 2 front panel push buttons --- NO POTS
  • Built-in null indicator: LEDs and separate DC null voltage output
  • Choice of 1, 3, 5, or 10 kHz nominal excitation frequencies
  • Use with 3-, 4-, 5-, or 6-wire LVDTs and inductive half-bridges including 3-wire GE LVRTs
  • Choice of 6 DC voltage outputs and 2 current loop outputs
  • 40 dB range of FS outputs from LVDT: 50 mV rms to 5 Volts rms
  • Master / slave synchronization to prevent beat frequencies
  • 15 - 32 Volts DC operating voltage, 80 mA max.
  • Self-diagnostic for LVDT winding failures or cable disconnection
  • Separate warning flag for all failures via open collector output
  • Digital communications link via RS-485 multi-drop bus with up to 16 addresses
  • Set up parameters can be saved and reloaded via RS-485 port
  • Color coded plug-in connections to 22.5 mm wide DIN-rail module
  • TWO (2) YEAR warranty instead of industry standard (1) year

Everight Sensors S1A LVDT Signal Conditioner Specifications

Operating power:
15 to 32 V DC (24 V DC nominal), 60 mA max. at 24 V DC
Excitation voltage:
3.0 Vrms sine wave push-pull drive nominal (factory default) 4.5 Vrms sine wave push-pull drive via on-board jumper shift 1.5 Vrms single ended drive for low impedance (100 -150 O) primary
Excitation frequencies:
1 kHz, 3 kHz, 5 kHz, 10 kHz (nominal)
External synchronization:
Master output is capacitively coupled to up to seven slave inputs; if synchronization is lost, module reverts to local oscillator control.
LVDT AC Output Signal:
50 mVrms to 5000 mVrms at LVDT's full scale position
Analog DC Outputs:
0 - 5 V, 1 - 5 V, 0.5 - 4.5 V, 0 -10 V, 2 -10 V, 0.5 - 9.5 V, 0 -20 mA sourcing, 4 -20 mA sourcing
Loop resistance:
50 Ohms min to 850 Ohms max (current loop output mode, 24 V DC supply)
Output non-linearity:
</=0.025% of Full Span Output (FSO)
Frequency response:
-3 dB at 10% of excitation frequency (nominal) (standard: DS2-4 off) -3 dB at 10 Hz (nominal) (low noise setting: DS2-4 on)
Noise and ripple:
</=2 mVrms (voltage output), or </=4 µArms (current loop output.)
Fault indication:
Loss of excitation, open primary or secondary, LVDT disconnected
Fault output:
LED indicators, open collector output, 50 mA, 26.5 V DC max.
Null detection:
Front panel LEDs, ± 30 mV threshold out of ˜ ±1.6V signal level
Null output:
LEDs, DC null voltage signal (˜ ±3 V DC = ±FS)
Operating Temperature:
-20 °C to +75 °C
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

S1A Module Outline Dimensions

S1 Schematic Diagram

Everight Sensors Corporation | 102 Commerce Dr. Unit 8, Moorestown, NJ 08057 | 856-727-9555 or contact@everightsensors.com
© Everight Sensors Corporation, 2010. All rights reserved.