Alpha Technologies FXM350_Micro350 UPS - Manual (Page 17)

15 017-241-B0 Rev B
12
Replaceable fan assembly
This microprocessor-controlled fan regulates the Alpha FXM internal temperature for optimum performance.
Microprocessor-control of the fan speed increases the life of the internal electronics and the fan.
Take care that the fan is not blocked. Failure of the fan generates an alarm; the internal fan assembly is de-
signed so it can be replaced if it fails.
13
AC input circuit breaker
This circuit breaker is an on/off switch for the line power into the Alpha FXM ,which also provides input pro-
tection. It must be switched on for proper Alpha FXM operation.
14
Battery heater mat connector
This connector plugs into a 55W heater mat (optional). The Alpha FXM senses the battery temperature
through the battery temperature sensor (explained in 6 above) and controls the battery heater mat. The
heater mat is set to turn on at 5°C or less and turns off at 15°C.
15
AC input/output connections
The terminal blocks provide connections to the AC input and loads for dual outputs.
11
Configurable dry contacts, C1 and C2
Contacts C1 and C2 allow the Alpha FXM to be connected to an external monitoring panel or to traffic control
equipment.
The factory default settings can be reprogrammed to meet your requirements. See "7.3.3.3 Monitoring > Re-
lay & Load Shed" on page 53 for web and Alpha UPS Monitor, and "7.5.4 Programming the Dry Contacts" on
page 82 for HyperTerminal.
C1:
The C1 contact is energized when line power is unqualified and the Alpha FXM provides backup battery
power to the load(s). Can be used to generate an “On Battery” alarm.
C2:
This contact is energized when the battery drops below a pre-set voltage level. Can be used to generate
a “Low Battery” alarm. You can change the pre-programmed level to match the batteries used and the actual
operating conditions. See "Adjusting and Controlling the Alpha FXM" on page 81: #35 Low Battery Warning
Voltage.
Figure 5 — Contact Layout (Standard for C1 and C2)
The contacts have
a maximum rating
of 1A at 250V.
Microprocessor
UPS
Interior
Normally
Closed (NC)
Normally
Open (NO)
Common (C)