SC-200 LVDT Signal Conditioner


• Cybersecurity lock to prevent tampering
• Smart calibration by front panel push buttons
• Differential input for superior noise immunity
• Color-coded screw terminal plugs
• Auto-mastering
• Hot swapability
• Shorted, disconnected, or open primary
• Shorted, grounded, disconnected, or open secondaries
• Output voltage shorts or current loop opens
• Errors during installation and setup

Alliance Sensors Group's SC-200 DIN-rail-mounting LVDT signal conditioner for industrial measuring systems, testing laboratories, and factory automation offers push buttons for fast and easy calibration of the Full Sale and Zero outputs, differiential input to minimize ground loop noise, and color-coded screw terminal plugs for quick hook up. The SC-200 is engineered to work with a very wide range of LVDT, RVDT, and inductive half-bridge (LVRT) sensors by providing four excitation frequencies that operate most AC-LVDTs over a 50 to 5,00 mVrms range of sensor output. SC-200 modules offer a choice of 8 analog outputs and half-duplex RS-485 digital comm port to faciliate remote setup and for saving a module's setup parameters to hot-swap them with another module. The SC-200 manual and GUI interfact are below.


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Operating Power: +15 to +30 V DC (+24 V nominal), 80 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 (nominal) single ended drive (for low impedance primary)
Excitation Frequencies: 2.5 kHz, 5 kHz, 7.5 kHz, 10 kHz (nominal)
Auto-Master Syncing: Master output controls up to fifteen slave units
LVDT Output Range: 50 to 5000 mVrms at LVDT’s 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 (3-wire), 4 - 20 mA sourcing (3-wire)
Loop Resistance: 850 Ohms maximum with 24 V DC supply
Output Non-Linearity: ≤±0.025% of Full Span Output (FSO)
-3 dB Response: 10% (min.) of excitation frequency (normal setting); 10 Hz (default) user adjustable (low noise setting)
Noise and Ripple: ≤1 mVrms (voltage output); ≤2 μArms (current loop output)
Fault Detection: Open LVDT windings, shorted or grounded LVDT connections, cable disconnected, voltage output shorted or current loop open
Failure Indications: Front panel LED's; NO/NC open-collector switch
Null Detection: Front panel LEDs; ±3V DC null output signal
Operating Temperature: -20 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
Cybersecurity Lock: User enabled