180 amp dc power system

Product Information

The Guardian Access 2U 180 Amp DC Power System is a 2RU high 19” rack-mounted, integrated DC power system providing an output of -48VDC. These systems can accommodate up to 3 Guardian family high efficiency hot-swap rectifiers.

The Guardian Access 2U 180 Amp DC Power System provides a total load current of 100A / 5.4kW is available with battery charge current up to 65A in addition. The rectifiers are internally fan cooled with speed control which is a function of load and temperature, keeping acoustic noise to a minimum.

The DC output circuits of the Guardian Access 2U 180 Amp DC Power System can provide up to 5 loads which utilize circuit breakers rated from 4A to 150A. 2 additional 80A, 100A or 125A breakers provide battery protection. A programmable 125A low voltage battery disconnect (LVD) is standard while a partial load disconnect (PLD), also rated at 125A and programmable, can provide non-critical load shedding when operating on batteries.



Features and Options
  • >96% Efficiency Rectifiers
  • 180A / 8.7kW Load Capacity
  • Remote Monitoring & Control
  • Intelligent Battery Management
  • Field Replaceable Controller
  • Ethernet Comm. with SNMPv3
  • 3 LED Alarm/Status Indicators
  • 4 Form-C Relay Alarms
  • Up to 5 Load Breakers
  • 2 Battery Breakers
  • LCD Display/Touchpad
  • Easy Installation
System Voltage-48VDC nominal | -53.5 float (factory default setting, user adjustable)
Maximum Capacity @ 120VAC nominalLoad - 70A
Battery - 70A discharge | 35A charge (s/w controlled)
Maximum Capacity @ 230/400VAC nominalLoad - 100A
Battery - 100A discharge | 65A charge (s/w controlled)
No. Rectifier Slots3
Load Circuits5 x 18mm (4A to 150A)
Battery Circuits2 x (80A, 100A or 125A)
Voltage (nominal)1-phase 100-120/200-240VAC (L + N + PE)
3-phase 230/400VAC (L1 L2 L3 + N + PE)
Maximum Input Current50A @ 100-120VAC | 39A @ 200-240VAC | 13A per phase @ 400/230VAC
Rectifier Power Factor>0.98 (typical)
Surge ProtectionOptional
MONITORING & CONTROL (ACX Advanced Controller)
Alarm Relays 4 Form-C
Local Interface 4 x 20 LCD, 4-key menu, USB / RS232, microSD card slot (4GB max,) for data logging
Remote InterfaceEthernet / Modem using PowCom™ software package
Ethernet port allows monitoring and control over a TCP/IP network.
Web browser support + SNMPv3
LED IndicationsGreen - System ON; Yellow - Message(s); Red LED - Alarm(s)
External Digital I/O 2 x Inputs, 2 x Outputs (TTL Level)
Symmetry Inputs6 or 12 (can be redefined as analog inputs up to 100VDC)
Low Voltage Battery Disconnect (LVD)1 x 125A Programmable
Partial Load Disconnect (LVD)1 x 125A Programmable (Optional)
Temperature Compensated ChargingProgrammable
EMCEN 300 386 ; EN61000-6-3 (Emission) ; EN61000-6-2 (Immunity)
SafetyIEC60950-1:2005 2 Ed. +A1:2009
Operating Temperature-40ºC to +55ºC
Storage Temperature-40ºC to +85ºC
DIMENSIONS, ins. (mm)
Standard Cover19.0 (483) W x 3.5 (88) H x 16.8 (428) D
Extended Cover19.0 (483) W x 3.5 (88) H x 19.7 (500) D
Battery Disconnection Provides voltage controlled disconnection of batteries.
Boost Charging Manual time controlled or automatic boost charging with adjustable time and voltage levels.
Battery Tests Automatic or manual testing of batteries up to six times per year with a 10 test memory. Variables include test duration and end voltage.
Battery discontinuance test to ensure battery connection.
Enhanced Battery Monitoring Monthly logging of essential battery parameters including temperature, temperature hours, current, charging voltage and symmetry voltage, Data logged for 5 years.
Site Logs System tools developed to assist site management. Daily peak load and statistic logs available.
Symmetry Measurement Optional tool that measures batteries for early detection of thermal runaway.
Temperature Compensation Charging

Allows continuous adjustment of output voltage according to battery temperature.
Features include adjustable compensation factor and separate thresholds for high temperature alarms.

Load Shedding (PLD) Optional feature that allows voltage or time controlled disconnection of non-essential load.  
STOCK MODELS (normally held in stock for immediate delivery)
MS0028G*900010 ACX Controller
4 alarm relays
100A Battery Breaker (x2)
Load Breakers: 63A/25A/25A/16A/16A
3m Temp. Sensor Cable (x1)

[Rectifiers & Dummy Modules must be ordered separately.]
ACX Controller
4 alarm relays
100A Battery Breaker (x2)
Load Breakers: 40A/40A/20A/20A/10A
3m Temp. Sensor Cable (x1)
3m Symmetry Cable (x2)

[Rectifiers & Dummy Modules must be ordered separately.]
For complete details and order codes for rectifiers and accessories see the datasheet.