5.0 Operation
5.5.2 Option Switch 2
Option Switch 2 functions differently for different versions of the UPS.
■100 Vac version No function; not used.
■120 Vac version
The UPS’s factory-set input voltage limits for on-line and SmartBoost operation are centered on the nominal input voltage of 120 Vac (see also Sec. 9.1). When Option Switch 2 is set to the on ( I ) position, the upper and lower transfer voltages are lowered by 4% and centered on a nominal input of 115 Vac. This is useful where nominal input voltage is 110 to 115 Vac.
■220/230/240 Vac version
The UPS’s factory-set on-battery output voltage and input voltage limits for on-line and SmartBoost operation are designed for use in regions where the nominal line voltage is 220 to 230 Vac. When Option Switch 2 is set to the on ( I ) position, the upper and lower transfer voltages are raised by 4% and centered on a nominal input of 240 Vac. In addition, the on-battery output voltage is increased to 240 Vac.
5.5.3 Option Switch 3
When Option Switch 3 is set to the on ( I ) position, the UPS’s audible alarm is disabled for the first 30 seconds of on-battery operation. This function is useful where brief power interruptions are frequent and cause the alarm to become annoying.
5.5.4 Option Switch 4
When Option Switch 4 is set to the on ( I ) position, the UPS’s low-battery alarm interval is extended from 2 minutes (factory setting) to 5 minutes. This function is useful if the UPS is protecting a computer system that requires more than 2 minutes warning to perform a graceful shutdown.