Appendix B: Fg# 5762 - Hybrid Xt 4-20 Ma Output Vane - NRG Systems Hybrid XT Vane Product Manual

NRG Product Manual
Hybrid XT Vane
APPENDIX B: FG# 5762 – HYBRID XT 4-20 MA OUTPUT VANE
Output Circuit Operation
The Hybrid XT 4-20 mA Turbine Control Vane provides an industry standard 4 to 20 mA output signal sourced by the
sensor. The output range of 4 to 20 mA corresponds to 0 to 360 degrees.
For yaw control, the sensor should be mounted so that an indicated direction of 180 degrees corresponds to a turbine
direction oriented directly into the wind. In this configuration, the sensor output signal is 12 mA when the turbine is
aligned with the wind, and the transition from 4 mA output to 20 mA output is opposite the normal control direction.
Under normal operation, the output signal current varies from 4 to 20 mA. A signal outside this range indicates a fault
condition. The most likely causes would be a loss of power, a wiring problem, or a failed sensor.
The Hybrid 4-20 mA signal output has been engineered to adapt to most common 4-20 mA current loop inputs. The
range of compatible loads for the current loop signal does depend on the power supply voltage provided to the sensor.
At the lowest specified power supply voltage of 11 V DC, the output loop load (or "burden") may be only up to 350
Ohms maximum (a 7 volt maximum voltage drop). When provided with its maximum 24 V DC power supply voltage, the
sensor can drive up to a 1000 Ohm loop load (a 20 V maximum voltage drop).
HybridXT_Vane_Manual
Rev 13.0
support@nrgsystems.com | Page 24
7 February 2017