Alliance Sensors Group’s S2A DIN-rail-mounting LVDT signal conditioner is designed specifically for the power generation industry. It offers comprehensive diagnostics for sensor and wiring failure, real-time recalibration of the Full Scale and Zero outputs, enhanced ground loop noise rejection, and backward compatibility to legacy S1A signal conditioners. Utilizing front panel push buttons for easy calibration, the S2A is engineered to work with the widest range of LVDT, RVDT, and inductive half-bridge LVRT sensors by providing four excitation frequencies that will operate most AC-LVDTs over a 50 to 5,000 mVrms range of sensor output. S2A modules offer a choice of 8 analog outputs and half-duplex RS-485 digital communications to facilitate remote setup and for saving a module's setup parameters to hot swap them with another module.
Technical datasheets and additional information can be found below.
- - Cybersecurity Lock to Prevent Tampering
- - Smart Calibration by Front Panel Push Buttons -- No Pots, No Calculations
- - Color-Coded Detachable Terminal Plugs
- - Real-Time Recalibration
- - Comprehensive Diagnostics
- - Null Detection LEDs
| Operating Power: | +15 to +30 V DC (+24 V nominal), 100 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 (jumper J7 removed), 1.5 Vrms (nominal) 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 units; if original master fails, new master is automatically generated for fail-safe excitation control. |
| LVDT Output Range: | 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, 0.5 - 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% (minimum) of excitation frequency (normal setting); 10 Hz (default) user adjustable (low noise setting) |
| Noise and Ripple: | ≤1 mVrms (voltage output), or ≤2 μArms (current output) |
| Fault Detection: | Open or shorted LVDT winding, open, shorted, or grounded LVDT connection, LVDT cable disconnected, open or shorted analog output |
| Failure Indications: | Flashing LEDs; analog output driven out of range; 50 mA open-collector switch, user settable to NC (default) or NO |
| Null Detection: | Front panel LEDs; ±3V DC max. floating null output signal |
| Operating Temperature: | -20 to 75 C |
| Temperature Coefficient: | ±0.002% of FSO/C (combined span and zero shift) |
| Zero Set: | Front panel push button or RS-485 ASCII command |
| Full Scale Set: | Front panel push button or RS-485 ASCII command |
| Digital Interface: | RS-485 2-wire multi-drop network, 16 addresses |
| Cybersecurity Lock : | User enabled |
Download the S2A Signal Conditioner Datasheet- Download Comparison S2A to S1A Signal Conditioners
- Download The Differences Between the S2A and SC-200 Signal Conditioner
- Download S2A/SC-200 vs Competition - Signal Conditioner
- Download EU EC Declaration of Conformity S2A Signal Conditioner
- Download LVDT Signal Conditioner S2A Manual
