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INEX System

INEX System

48V Modular Inverter System

INEX System
Data sheet
Source of supply

The INEX inverter series is an integrated telecommunications power system, including inverter, static switch, LCD display controller, and interface modules. With a versatile “building block” design and N+1 redundant configuration, the INEX inverter system facilitates complex telecommunications and industrial power demands, and provides ultimate flexibility for your current and future power requirements.

N+1 parallel redundancy allows power capacity expandable up to 18KVA. INEX "all master" dynamic mechanism automatically shares and re-organizes critical loads to prevent interruption should any inverter module fail. The DSP-microprocessing controller gives real-time system status through a comprehensive LCD display, and allows programmable settings through the display panel. With a communication interface module installed, you can further control and monitor the system remotely.

  • Versatile modular design provides flexibility for different power applications
  • Expandable capacity up to 18KVA with N+1 redundancy configuration
  • "All master” dynamic mechanism eliminates single point failure to optimize reliability
  • Hot-swappable operation allows module addition or removal without powering down
  • High power density and high efficiency

Technical data


The INEX inverter module provides pure sine wave AC power output for critical telecommunications equipment. Adopting N+1 redundancy design, the INEX inverter can operate up to 12 units in parallel. The INEX inverter module is specially designed with a compact size of maximized power density that can reach up to 5.57W/ inch3 for INEX 1000 and 8.36W/inch3 for INEX1500. A 1U height design allows the module to be installed onto a standard ETSI 300mm rack. The INEX module is a revolutionary telecom power solution in terms of maximum flexibility and reliability.

  • Pure sine wave
  • Hot-swap replacement in shelf
  • High efficiency >88%
  • DSP design for higher system reliability
  • Lower audible noise <55dBA
  • Smart fan speed control
  • N+1 redundancy system, load sharing difference < 5%
  • -48VDC Telecom system application
  • Wide operation temperature range, -20 to 70° C                                                                        
STS Module
The INEX STS (Static Transfer Switch) module increases
system reliability by automatic power transfer between
the inverter output and the AC mains. By setting up the
priority of operation mode, users can change the system
status of “on line mode” or “off line mode”. The on line
mode will keep the input power provided by the inverter
line and when the inverter fails, the line will switch to
AC utility line. In off line mode, the system power is
always connected to the AC utility line and will switch
to inverter power line when AC utility fails. The transfer
time is less than a quarter cycle which prevents the
power interruption. The reliable performance of INEX
STS module will provide the maximum protection to
the connected telecommunication equipment against
possible damage caused by the system power failure.
  • Universal input range
  • Back-feed protection
  • Redundant fan design
  • Operation Priority Setup of transfer by setting in Control Module
  • Fast transfer time, typically less than ¼ cycle
  • Wide operation temperature range, -20 to 70°C
  • Lower audible noise <55dBA
  • No-cross connect
  • Optional maintenance bypass switch function
Controller Module
The INEX controller module allows users to monitor the
system status in real time. Its superior design enables
users to manage the inverter and STS module status
including voltage, current, frequency, capacity and
temperature. With a user-friendly interface design, users
can easily manage the inverter and STS module settings
including voltage, frequency, redundancy (for inverter
module), and priority (STS module). The controller
module can also record the alarm history which can help
to understand the operating status while maintaining the
system or making further adjustments to improve system
  • CAN Bus protocol for module communication
  • Relay contact output for customized alarms
  • Hot swappable design
  • Real time clock embedded
  • Comprehensive LCD & LED for status display
  • Audible alarm function

The INEX MBSDU maintenance bypass switch plus
AC distribution unit allows user to perform maintenance
service to system without shutdown. The integrsated
AC distribution manages output power connections
with NEMA or IEC outlets and bulk output terminals
with breaker protection.


  • MBS switch 50A capacity
  • 4 x 15A branch breakers with 5-15R NEMA outlets
  • 2 x 20A branch breakers with 5-20R T-Blade NEMA outlets
  • 2 x 100A input and output main breakers
  • AC bulk input and output termination
  • 2RU height, 19" panel 120VAC


  • MBS switch 50A capacity
  • 4 x 20A branch breakers with 2 x C13 IEC sockets
  • per breaker
  • 2 x 100A input and output main breakers
  • AC bulk input and output termination
  • 2RU height, 19" panel 230VAC

Communication Interface

The communication interface includes several options
for wider applications which facilitates the remote
managing to the system. The standard ports include
relay contacts, RS-232, RS-485 and USB. Relay
contacts provide five programmable settings to display
customized information. RS-232 & USB ports provide
the serial connection to the PC for software monitoring.
RS-485 provides a long distance connection for direct
monitoring. The communication interface provides
powerful monitoring and management solutions to the
system manager.
  • Relay contacts
  • RS-232
  • RS-485
  • USB

WinPower Monitoring Software

WinPower is a monitoring software which supports
either a stand alone computer or network connected
  • Real time monitoring of each module in the inverter system
  • Panoramic views of all the related information; utility power,
  • system status and STS status
  • Auto search function with any inverter power modules
  • in LAN.
  • Password security protection
  • Comprehensive installation (and uninstall) process

Inex System 48V Modular Inverter System


>Inverter Module

DC input:  
Nominal voltage: 48VDC
Operating range: 40.5VDC ~ 58VDC
Input protection: Reverse polarity protection
Psophometric noise voltage: <1.0mV ITU-T O.41 (16.66~6000Hz)
AC output:  
Power rating: 1000VA/800W, 1500VA/1200W
Waveform: Pure sine wave
Power factor: 0.8
Nominal output voltage: 110/115/120VAC, 208/220/230/240VAC
Voltage variation: Max ±2%
Output frequency: 50/60Hz
Crest factor: 3:1
THD: <3%, linear load
<5%, non-linear load
Efficiency: Min 88%
Isolation AC-enclosure: Basic isolation (Pri-Gnd) 2121VDC/1min
Dynamic response: <±10%
Over load protection: 1.5*Inom >20s
1.25*Inom temperature controlled
>STS Module  
Over voltage threshold: Adjustable between
127 to 138VAC for 120VAC systems,
the default value is 132VAC
233 to 252VAC for 220VAC systems,
the default value is 242VAC
Under voltage threshold: Adjustable between
100 to 114VAC for 120VAC systems,
the default value is 108VAC
176 to 209VAC for 220VAC systems,
the default value is 198VAC
Backfeed protection: Comply with safety requirement
Redundant power: Startup power-on by priority
Design: Source or alternative

Nominal output voltage: Same as utility or the output of
inverter modules
Permissible frequency area: Max. +/-2.5% (inverter synchronization)
Transfer time: Typical 1/4cycle
Rated power: 50A for 110/115/120VAC & 208/220/230/240VAC
Operation methods: Inverter priority/mains priority

Operating temperature: -20 to 70°C (-4 to 158°F)
-5 to 58°C (23 to 122°F) with full performance
Storage temperature: -40 to +85°C (-40 to 185°F)
Humidity 90% relative humidity (non-condensing)
Audible noise: 55dB

Controller Module
Nominal voltage: 48VDC
Operating range: 30VDC ~ 72VDC
Over current protection: 2A fuse
Human interface:  


Resolution (line X array)
4 X 16 charactor

LED indicator: 3 colored indicators for normal, warning
and fault display
Alarm: Audio alarm when inverter, STS, controller
module operate abnormally
System parameter:  
Baud Rate: Setting controller com port baud rate
Keypad tones: Setting keypad tones
Time & date: Setting current time and date
Setting password: Setting system password
Brightness: Setting LCD brightness
Default: Change current system parameters
to default value


>Inverter Module

mm: 270D x 215W x 43.8H
inches: 10.63D x 8.46W x 1.72H

2.5kg (5.5lb)

>STS Module  
mm: 270D x 215W x 43.8H
inches: 10.63D x 8.46W x 1.72H
Weight: 2.0kg (4.4lb)
>Controller Module  
mm: 277D x 87.9W x 43.5H
inches: 10.9D x 3.46W x 1.71H
Weight: 1.0kg (2.2lb)
>Hot-swap Chassis  
19/23” mounting brackets
Inverter chassis
mm: 329.5D x 440W x 44H
inches: 13D x 17.32W x 1.73H
Weight: 2.5kg (5.5lb)
STS & controller chassis
mm: 329.5D x 440W x 44H
inches: 13D x 17.32W x 1.73H
Weight: 3.4kg (7.5lb)

Communication Interface
RS-232×1: Communicate with PC
RS-485×2: Communicate with supervision

Dry contact×5:

Communicate with external monitor
USB×1: Communicate with PC

UL, CE, RoHS, C-Tick