When the heat sink temperature exceeds 95 C, the red warning indicator is illuminated on the attached bin control panel. When the heat sink temperature exceeds 110 C, the power supply is automatically shut down, causing both the power and temperature indicator lights to turn off. Recovery from thermal overload is automatic when the thermal load is reduced. This provides overload and short-circuit protection. V dc supplies, crowbar circuits limit the output voltage to 7.5 V to protect integrated circuits.
Fuses protect the ac inputs to the power supply.
An external slide switch allows selection of either 115 or 220 V ac as the power input. By changing pins on an internal connector, this selection can be altered to 100 and 200 V ac. An international standard IEC power connector permits power cords and plugs that meet local electrical standards to be used for the input power. An external slide switch selects nominal input voltages of 115 or 220 V ac. Both input power lines include fuses.