5.0 Operation
5.4.2 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 in the on (down) 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 (down) 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.
5.4.3 Option Switch 3
When Option Switch 3 is set to the on (down) 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.
5.4.4 Option Switch 4
When Option Switch 4 is set to the on (down) position, the UPS’s Auto-on mode is disabled, and the UPS must be turned on and off with the rear- panel UPS Enable switch. When Option Switch 4 is set to the off (up) position, the UPS and the devices plugged into the accessory outlets are turned on when the device plugged into the master outlet is turned on. Refer to Section 4.4 for more information about Auto-on operation.
The factory default setting for Switch 4 is down (Auto-on disabled).