Table S — Mechanical Specifications
Parameter
Value
User inputs
Three optically-isolated and powered inputs are located on the front panel.
When they are shorted, their functions are:
S1: Starts the self test.
S2: Activates an alarm.
S3: Unit shutdown.
User interface
6
2 x 20 backlit alpha-numeric LCD screen. Three control buttons located
below.
1. Capable of operating at 73% of rated full load for up to 2 hours at 74°C. Above 55°C ambient, derate output
power by 1.4% per °C rise, up to 74°C max.
2. Capable of operating at 100% of rated full load below 0°C down to -40°C after the Alpha FXM has been
stabilized at 0°C for at least 1 hour.
3. FXM 1100/2000-120V only: above 50°C ambient, derate output power by 1.1% per °C rise, up to 74°C max.
4. Derate 2°C per 300 m (1000 ft) above 1400 m (4500 ft).
5. For FXM650/1100-48(Q), the default setting of C3 is “FAULT”.
6. The LCD display may not function below -15°C. It gradually resumes normal operation as the temperature
rises above -15°C. This will not affect the operation of the Alpha FXM.
Table T — Electrical Specifications
Parameter
Value
Input
Voltage (nominal), Vac
120 or 230, optional 208, 210, 240 for FXM 2000, 120 only for FXM 650-48
Frequency, Hz, ±5%
60/50 (auto-detection), Output frequency = Input frequency
Current, Amps (@
nominal Vin and max
battery charging current)
FXM 650-24: 8.7/4.5 @120/230 Vac FXM 650-48: 10.5 @120 Vac
FXM 1100: 15.5/8 @120/230 Vac FXM 2000: 20/12 @120/230 Vac
Input Circuit Breaker
Ratings, Amps
FXM 650-24: 15/10 @120/230 Vac FXM 650-48: 15 @120 Vac
FXM 1100: 20/10 @120/230 Vac FXM 2000: 25/15 @120/230 Vac
Battery Circuit Breaker
Ratings, Amps
FXM 650-48/1100: 50
FXM 650-24/2000: 80
Output
Voltage (nominal), Vac
120 or 230, optional 208, 210, 240 for FXM 2000, 120 only for FXM 650-48
Frequency, Hz, ±5%
60/50 (output frequency = input frequency.)
Power, W/VA
FXM 650: 650
FXM 1100: 1100
FXM 2000: 2000
Waveform
Pure sine wave
Load Crest Factor
3:1 (load dependent)
Output Voltage Distortion
< 3% THD (resistive load)
Efficiency
7
Normal Mode Backup
(Inverter) Mode
> 98%
> 82% (48 Vbatt), >75% (24 Vbatt)
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