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 70,000 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 b...
Read MoreThe Powerbox PB256 Series DC-UPS and Battery Charger is a compact and dependable 138W power solution, trusted in over 70,000 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.
Key features include independent current limiting for load and battery circuits, selectable low-voltage disconnect, and advanced alarm relays for real-time system monitoring. Natural convection cooling and an optional conformal coating enable reliable operation in wet or humid environments.
Available in 13.8Vdc (10A) and 27.6Vdc (5A) configurations, the PB256 Series meets AS/NZS 60950 safety standards and holds C-Tick EMC certification - making it the preferred DC-UPS solution for essential power backup across Australia and New Zealand.
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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 Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.