Xtreme Power Conversion Corporation
M90S-4S User’s Manual
Page 17
Uninterruptible Power Supply
2.9 Wiring
•
WARNING:
• Before wiring, make sure the AC input and battery power are completely cut off.
• Make sure the breakers, including AC input breaker, AC output breaker and DC breaker, are all in the OFF
position.
• If installing two slot chassis please ensure chassis is installed in rack before wiring is installed. (Refer to
section 2.11).
2.9.1 Installation Drawing
UPS Chassis Wiring
2.9.2 AC source connection
Connect AC input to the AC power source. Please refer to Installation Drawing for UPS wiring.
The polarity of two phase (L1 phase and L2 phase) are not critical. The wrong polarity will not cause an alarm for
UPS system when the UPS is powered.
The Neutral wire must be connected properly. A warning message will be indicated if the Neutral wire is not con-
nected properly. The UPS will show warning message as “Warning! Bypass Input N Error”. Then the UPS will trans-
fer to battery mode if battery pack is connected or transfer to standby mode and no output if no battery pack is
connected.
2.9.3 External Battery Pack Connection