Apc 600 User Manual download pdf (Page 22)

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.

5.0 Operation

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Apc 600 User Manual Page 22