Battery Chargers

Powerbox PB256 SERIES Battery Charger / DC-UPS

The Powerbox PB256 Series DC-UPS and Battery Charger is a compact and dependable 138W power solution, trusted in over 50,000 installations to date across electronic security, access control, telecommunications, and water utility applications. Designed for long-term reliability and efficiency, it delivers uninterrupted DC power with intelligent battery management for critical infrastructure.

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Features

  • Battery Backup System: ensuring continuous power supply to DC loads during mains powered interruptions.
  • DC-UPS functionality with seperate current limited battery and load terminals. This ensures both loads and battery are protected.
  • Trusted in Security Applications: Proven reliability as the backbone for electronic security across Australia, powering critical access control systems and associated security equipment.
  • Available in 13.8Vdc or 27.6Vdc outputs, suitable for 12V and 24V battery systems, respectively.
  • Comprehensive Alarms: including DC-OK and Battery Low alarms with LED indicators and voltage-free changeover relay contacts for system monitoring.
  • Protective Features: Incorporates battery low voltage disconnect, battery overload protection, and optional conformal coating for operation in moist environments.
Specifications
INPUT
Input Voltage 190-.264Vac, or 190-.400Vdc
Frequency 45 to 65 Hz
Input Current 3A maximum
Inrush current 15A on cold start
Line Regulation 0.2% typical
ALARMS AND BATTERY FUNCTIONS
Converter ON/OK alarm Indicated by voltage-free changeover relay contacts & green LED: ON=OK
Battery low alarm < 11.3Vdc: 12V Battery
< 22.6Vdc: 24V Battery
Indicated by voltage-free changeover relay contacts & green LED: ON=OK.
Low voltage disconnect 10.8V (Typical for 12Vdc battery)
21.6V (Typical for 24Vdc battery)
Battery over-load protection Electronic circuit breaker auto-reset
Battery to load voltage drop 0.2 V (27.6V output)
OUTPUT
Output Voltage 13.8Vdc, 27.6Vdc
Output Power 138W, See power derating curve
Output Current 13.8Vdc: 10A
27.6Vdc: 5A
See Selection Table
Load regulation 2% typical
Ripple & Noise 25 mVp-p (13.8Vdc output)
45mVp-p (27.6Vdc output)
Efficiency > 80%
OPTIONAL FEATURES¹
Battery Charge Limit Option BCL: Specify battery charge current based on battery size.
Heatsink Option H: Supplementary heatsink
Conformal Coating Option CC: Tropic protection for moist areas

 

PROTECTION
Current limit type (Load circuit) Constant current > LVD volts
Foldback & hiccup < LVD volts
Short circuit protection Indefinite, auto-resetting
Over-voltage protection 15.5 to 19.5 V latching (13.8Vdc output)
31.5 to 39 V latching (27.6Vdc output)
Reverse polarity protection Internal fuse
Isolation Input to Output: 2.1Kvdc 1 min
Output to Ground: 2.1Kvdc 1 min
Output to Ground: 700Vdc 1 min
STANDARDS AND APPROVALS
C-Tick AS/NZS CISPR11 Group 1 Class A.
Safety Complies with AS/NZS 60950, Class 1
EMC Emissions comply with AS/NZS CISPR11,
Group 1, Class B. Complies with ACA EMC
Scheme, C-Tick
ENVIRONMENTAL
Operating temperature 0 to 50°C ambient
For derating, see curve in technical illustrations
Humidity 5 to 90% relative humidity (non-condensing)
Over-temperature protection Automatic & auto-resetting
Cooling requirement Natural convection
Shock/Impact 50G 11mS once each along x, y and z axis
MECHANICAL
Input Connector AC Mains 10A Class 1
IEC60320 power inlet
Load and Battery Connector 4 way pluggable screw terminal block.
Suitable for up to 1.5mm² wire
Alarms Connector 6 way pluggable screw terminal block
Suitable for up to 1.5mm² wire
Case size 230 L x 93 W x 46 H (mm)
Weight 850g
Security Cabinet Option W: WMBB-C-S
Wall Mount Box Black
with battery Cables and tamper Switch
View WMBB-C-S Security Cabinet
Selection Table
MODEL NUMBER OUTPUT VOLTAGE LOAD CURRENT  BATTERY CURRENT² TOTAL CURRENT³ TOTAL OUTPUT POWER
PB256-1210CML 13.8Vdc 8A 2A 10A 138W
PB256-2405CML 27.6Vdc 4A 1A 5A 138W

 

¹ Example Ordering Code: PB256-1210CML-CC-H4, includes conformal coating, additional heatsink and 4A battery charge current limit

² Other optional BCL, Battery Charging current Limits available on request, factory set.

³ Total output current = sum of load and battery charging current.

Technical Illustrations
Downloads
PB256-Series_DC_UPS_Battery_Charger.pdf
INPUT
Input Voltage 190-.264Vac, or 190-.400Vdc
Frequency 45 to 65 Hz
Input Current 3A maximum
Inrush current 15A on cold start
Line Regulation 0.2% typical
ALARMS AND BATTERY FUNCTIONS
Converter ON/OK alarm Indicated by voltage-free changeover relay contacts & green LED: ON=OK
Battery low alarm < 11.3Vdc: 12V Battery
< 22.6Vdc: 24V Battery
Indicated by voltage-free changeover relay contacts & green LED: ON=OK.
Low voltage disconnect 10.8V (Typical for 12Vdc battery)
21.6V (Typical for 24Vdc battery)
Battery over-load protection Electronic circuit breaker auto-reset
Battery to load voltage drop 0.2 V (27.6V output)
OUTPUT
Output Voltage 13.8Vdc, 27.6Vdc
Output Power 138W, See power derating curve
Output Current 13.8Vdc: 10A
27.6Vdc: 5A
See Selection Table
Load regulation 2% typical
Ripple & Noise 25 mVp-p (13.8Vdc output)
45mVp-p (27.6Vdc output)
Efficiency > 80%
OPTIONAL FEATURES¹
Battery Charge Limit Option BCL: Specify battery charge current based on battery size.
Heatsink Option H: Supplementary heatsink
Conformal Coating Option CC: Tropic protection for moist areas

 

PROTECTION
Current limit type (Load circuit) Constant current > LVD volts
Foldback & hiccup < LVD volts
Short circuit protection Indefinite, auto-resetting
Over-voltage protection 15.5 to 19.5 V latching (13.8Vdc output)
31.5 to 39 V latching (27.6Vdc output)
Reverse polarity protection Internal fuse
Isolation Input to Output: 2.1Kvdc 1 min
Output to Ground: 2.1Kvdc 1 min
Output to Ground: 700Vdc 1 min
STANDARDS AND APPROVALS
C-Tick AS/NZS CISPR11 Group 1 Class A.
Safety Complies with AS/NZS 60950, Class 1
EMC Emissions comply with AS/NZS CISPR11,
Group 1, Class B. Complies with ACA EMC
Scheme, C-Tick
ENVIRONMENTAL
Operating temperature 0 to 50°C ambient
For derating, see curve in technical illustrations
Humidity 5 to 90% relative humidity (non-condensing)
Over-temperature protection Automatic & auto-resetting
Cooling requirement Natural convection
Shock/Impact 50G 11mS once each along x, y and z axis
MECHANICAL
Input Connector AC Mains 10A Class 1
IEC60320 power inlet
Load and Battery Connector 4 way pluggable screw terminal block.
Suitable for up to 1.5mm² wire
Alarms Connector 6 way pluggable screw terminal block
Suitable for up to 1.5mm² wire
Case size 230 L x 93 W x 46 H (mm)
Weight 850g
Security Cabinet Option W: WMBB-C-S
Wall Mount Box Black
with battery Cables and tamper Switch
View WMBB-C-S Security Cabinet
MODEL NUMBER OUTPUT VOLTAGE LOAD CURRENT  BATTERY CURRENT² TOTAL CURRENT³ TOTAL OUTPUT POWER
PB256-1210CML 13.8Vdc 8A 2A 10A 138W
PB256-2405CML 27.6Vdc 4A 1A 5A 138W

 

¹ Example Ordering Code: PB256-1210CML-CC-H4, includes conformal coating, additional heatsink and 4A battery charge current limit

² Other optional BCL, Battery Charging current Limits available on request, factory set.

³ Total output current = sum of load and battery charging current.

PB256-Series_DC_UPS_Battery_Charger.pdf

Find the Right Model

Model Number Input Voltage (Vac) Output Voltage (Vdc) Output Current (A)
product variant PB256-1210CML 190...264Vac 50/60Hz 13.8Vdc 10A (Default = 8A Load / 2A Battery)
product variant PB256-2405CML 190...264Vac 50/60Hz 27.6Vdc 5A (Default = 4A Load / 1A Battery)

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