Alpha Technologies FXM350_Micro350 UPS - Manual (Page 16)

017-241-B0 Rev B 14
Figure 4 — User input layout
6 Battery temperature sensor connector
The battery charging voltage is temperature dependant. A battery temperature sensor connects to the Alpha
FXM so that the Alpha FXM microprocessor can adjust the charging voltage for optimum charging.
The sensor MUST be attached to the Alpha FXM for normal operation. If the sensor is not attached, a “Tem-
perature Probe Unplugged” alarm appears on the LCD.
7
Battery voltage test points
These test points let you measure the battery voltage. They accept 2 mm diameter test probe tips. The bat-
tery circuit breaker must be on to measure the voltage.
The battery voltage test points are not to be used as a power outlet.
8
Optically isolated user inputs
These optically isolated inputs are used to attach an external switch panel for remote control of the
Alpha FXM.
The User Input connector has three contacts (Figure 4) that are used to control the Alpha FXM. The default
settings for the user inputs are as follows:
1 (S1):
Shorting this contact to Common starts the Alpha FXM battery test. See "Battery Test" on page 95.
2 (S2): Shorting this contact to Common activates an alarm. See "7.3.4.9 Maintenance > User Input" on
page 63.
3 (SC):
Isolated return for contacts S1, and S2.
1 2 3
9
Additional user inputs and dry contacts connector
Enables connection to 3 dry contacts and 2 user inputs on the Micro350 top panel or to optional rack mount-
ing ears (see Figure 20).
10
Status and Alarm LEDs
Status:
Green LED solidly illuminated: the Alpha FXM is in Line mode and line power is provided to the load.
Green LED flashing: the unit is in Inverter mode and backup battery power is provided to the load.
Alarm:
Red LED solidly illuminated: fault in the Alpha FXM. (See "Table P — Fault Submenu" on page 97.)
Red LED flashing indicates an alarm. ( See "Table O — Alarm Submenu" on page 96.)
SC:Common S1:Self Test S2:Alarm