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Battery breaker
This circuit breaker provides over-current protection and is used as an on/off switch for the
battery power. It must be switched on for proper Alpha FXM operation.
Battery connector
The battery connector connects the external batteries to the Alpha FXM.
Replaceable fan assembly
This microprocessor-controlled fan turns on at a programmable temperature to lower the Alpha
FXM internal temperature. It must not be blocked. An Alarm is generated if the fan fails; a failed
fan can be replaced in the field.
RJ45 communication module connector
The RJ-45 connector is the Alpha FXM Ethernet connector.
LCD control panel and menu navigation buttons
The LCD control panel together with the cancel, scroll and select buttons are used to monitor and
control the Alpha FXM.
Battery voltage test points
These test points accept 2 mm diameter test probe tips. The battery circuit breaker must be on to
measure the voltage.
The battery voltage test points are not to be used as a power outlet.
RS-232
This DE-9 connector allows a straight-through DE-9 to DE-9 connector cable to be used to
connect the Alpha FXM to a computer for remote control and monitoring.
Battery temperature sensor connector
The battery charging voltage is temperature dependant when compensation is not set to 0
mV/°C/cell. A battery temperature sensor connects to the Alpha FXM so the Alpha FXM
microprocessor can adjust the charging volt- age for optimum charging. Refer to "UPS
Maintenance > Battery" on page 38.
The sensor MUST be attached to the Alpha FXM for normal operation. If the sensor is not
attached, a “Temperature Probe Unplugged” alarm appears on the LCD.
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