The HNO-PS is an emergency power supply for the "PS-series" (power supply units). The emergency power supply becomes active when the 24 Vdc power supply for the "PS-series" fails and/or the alarm input is interrupted (thermostat and/or phase protection). The HNO-PS is a 24 Vdc uninterruptible power supply with two batteries, enabling motors to move to emergency positions during power failures or alarm contact activation.
