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ProductsCable / BroadbandOutside Plant PowerPower SuppliesGMX Series
GMX Series
  • Line Interactive Ferro Technology (LIFT)
  • Wide input voltage range of ±30%
  • Compact packaging with light weight ferro
  • Field programmable flash memory
  • Embedded DOCSIS Monitoring Option
  • Built-in battery circuit breaker
  • IEC style line cord


Alpha’s GMX Series is a cost-effective standby power supply. It is an ideal solution for cable operators who need a quality, reliable, basic uninterruptible power supply. Features of the GMX include status monitoring card slot, smart display, terminal block output connections, 63V and 87V output taps, external battery temperature probe, built-in chassis handle and removable MOV’s.
GMX
GMX 915
Electrical Specifications
Input Voltage115Vac
Input ToleranceOperating+/-30% (80 to 150Vrms)
Nominal Input Current13A
Input Frequency (without going to standby)60Hz, +-3Hz
DC Voltage36Vdc
Low DC Voltage Cutout1.75V/Cell
Output Voltage (Vac)63/87V (Field Selectable)
Output Regulation, 87V Tap±3%
Output Regulation, 63V Tap2±4%
Rated Output Current15A rms
Output Frequency60Hz, ±1Hz (Inverter Operation)
WaveformQuasi Square wave
Slew Rate<200 V/ms, <100 V/ms typical
Crest Factor Ratio (Peak RMS)1.31 typical
Battery Charging
Charge Current10A
Temperature Compensation-5mV/Cell/°C (Programmable)
Constant Current OperationHigh Rate Charge to 90% Capacity
Constant Voltage Operation2.40V/Cell (Typ. 7hrs) @ 77°F
Environmental Specifications
Operating Range–40° to 55°C / -40° to 131°F at Front Air Inlet of Power Supply
Humidity0 to 95% non-condensing
Altitude0 to 10,000ft (3000m) above sea level
Mechanical Specifications
Dimensions (in/mm)7.8 x 18.3 x 11.4 / 198 x 465 x 290
Weight (lb/kg)60/27.5
Front Panel Display (LCD)2 x 20 Character LCD
Front Panel Indicators (LED)Output Status & Alarm
FinishBlack Powdercoat
Communication Specifications
Status MonitoringOptional DSM & ESM
Safety RecognitionUL 1778/CSA C22.2, No. 107.1
EmissionsCISPR 22, Class A
GMX 915P
Electrical Specifications
Input Voltage225Vac
Input ToleranceOperating+/-30% (158 to 292Vrms)
Nominal Input Current7A
Input Frequency (without going to standby)60Hz, +-3Hz
DC Voltage36Vdc
Low DC Voltage Cutout1.75V/Cell
Output Voltage (Vac)63/87V (Field Selectable)
Output Regulation, 87V Tap±3%
Output Regulation, 63V Tap2±4%
Rated Output Current15A rms
Output Frequency60Hz, ±1Hz (Inverter Operation)
WaveformQuasi Square wave
Slew Rate<200 V/ms, <100 V/ms typical
Crest Factor Ratio (Peak RMS)1.31 typical
Battery Charging
Charge Current10A
Temperature Compensation-5mV/Cell/°C (Programmable)
Constant Current OperationHigh Rate Charge to 90% Capacity
Constant Voltage Operation2.40V/Cell (Typ. 7hrs) @ 77°F
Environmental Specifications
Operating Range–40° to 55°C / -40° to 131°F at Front Air Inlet of Power Supply
Humidity0 to 95% non-condensing
Altitude0 to 10,000ft (3000m) above sea level
Mechanical Specifications
Dimensions (in/mm)7.8 x 18.3 x 11.4 / 198 x 465 x 290
Weight (lb/kg)60/27.5
Front Panel Display (LCD)2 x 20 Character LCD
Front Panel Indicators (LED)Output Status & Alarm
FinishBlack Powdercoat
Communication Specifications
Status MonitoringOptional DSM & ESM
Safety RecognitionUL 1012/CSA C22.2, No. 107.1
EmissionsCISPR 22, Class A
GMX 915E
Electrical Specifications
Input Voltage225Vac
Input ToleranceOperating+/-30% (158 to 292Vrms)
Nominal Input Current7A
Input Frequency (without going to standby)50Hz, +-3Hz
DC Voltage36Vdc
Low DC Voltage Cutout1.75V/Cell
Output Voltage (Vac)63/87V (Field Selectable)
Output Regulation, 87V Tap±3%
Output Regulation, 63V Tap2±4%
Rated Output Current15A rms
Output Frequency50Hz, ±1Hz (Inverter Operation)
WaveformQuasi Square wave
Slew Rate<200 V/ms, <100 V/ms typical
Crest Factor Ratio (Peak RMS)1.31 typical
Battery Charging
Charge Current10A
Temperature Compensation-5mV/Cell/°C (Programmable)
Constant Current OperationHigh Rate Charge to 90% Capacity
Constant Voltage Operation2.40V/Cell (Typ. 7hrs) @ 77°F
Environmental Specifications
Operating Range–40° to 55°C / -40° to 131°F at Front Air Inlet of Power Supply
Humidity0 to 95% non-condensing
Altitude0 to 10,000ft (3000m) above sea level
Mechanical Specifications
Dimensions (in/mm)7.8 x 18.3 x 11.4 / 198 x 465 x 290
Weight (lb/kg)67/30.5
Front Panel Display (LCD)2 x 20 Character LCD
Front Panel Indicators (LED)Output Status & Alarm
FinishBlack Powdercoat
Communication Specifications
Status MonitoringOptional DSM & ESM
Safety RecognitionEN 50091-1-2, IEC 60950 CCC,
CB scheme CE and KTL
EmissionsEN 50091-2, (CE Class A)
Document Downloads
Title Type Version Date
GMX Quick Start Guide - English (LTR) Manual 017-932-B1-001, Rev. © 20 March 1, 2006
GMX Series Data Sheet - Chinese (A4) Datasheet 049-242-13-001 April 1, 2006
GMX Series Data Sheet - English (A4) Datasheet 049-242-11-002 February 1, 2006
GMX Series Data Sheet - English (LTR) Datasheet 049-242-10-002 June 1, 2007
GMX Technical Manual - English (LTR) Manual 017-932-B0-001 June 1, 2006