Powerbox PBB2S MK II Series DC-UPS Battery Charger
The Powerbox PBB2S MK II Series DC-UPS Battery Charger supplies regulated DC power and battery backup for electronic security and access control systems, including CCTV, electronic locks and intrusion detection. It combines a power supply and a current-limited battery charger in one unit, so connected equipment keeps running from the battery whe...
Read MoreThe Powerbox PBB2S MK II Series DC-UPS Battery Charger supplies regulated DC power and battery backup for electronic security and access control systems, including CCTV, electronic locks and intrusion detection. It combines a power supply and a current-limited battery charger in one unit, so connected equipment keeps running from the battery when mains power fails.
The MK II is a direct replacement for the original PBB2S Series. Electrical performance, mechanical footprint and mounting points are unchanged, so existing installations can be upgraded without modifying the enclosure or rewiring.
Three models cover 12V and 24V sealed lead acid battery systems, all with a 90 to 264Vac input:
- PBB2S-13-3.5 MK II: 13.8Vdc, 3.25A
- PBB2S-13-7 MK II: 13.8Vdc, 6A
- PBB2S-28-3.5 MK II: 27.6Vdc, 3.0A
Compliance
The Powerbox PBB2S MK II is certified to AS/NZS 61558.2.16 for general use, complies with AS/NZS 62368.1 and CISPR 32 Class B EMC, and is registered under the Electrical Equipment Safety System (EESS), registration number E2025004894.
Key features
- Separate, current-limited outputs for the DC load and the battery
- Two-step bulk and float charge profile with low voltage disconnect
- Overcurrent, short-circuit and overvoltage protection with latching shutdown
- Battery reverse polarity protection, self-resetting battery fuse and overtemperature protection
- LED indicators and form-C relays for Mains/DC OK, Battery OK and Battery Fuse Fail
- Aluminium enclosure with natural convection cooling and no internal fans
Beyond security, the Powerbox PBB2S MK II suits automation, communications and infrastructure projects that need a compact 12V or 24V DC-UPS with documented compliance to Australian standards. The datasheet and installation manual are available on this page, with Australian engineering support for model selection and integration.
Show Less
Features
- Designed for critical backup power in security and access control systems: The PBB2S MK II is purpose-built to deliver uninterrupted DC power and battery charging for systems requiring high availability, including CCTV, electronic locks, and intrusion detection.
- Available in 13.8Vdc (3.25A and 6A) and 27.6Vdc (3.0A): Three model variants support both 12V and 24V lead-acid battery systems, providing flexibility for a range of low-voltage standby applications across different installation types.
- Certified to AS/NZS 61558.2.16 and AS/NZS 62368.1 standards: Complies with updated safety regulations for general use, ensuring suitability across commercial, industrial, and security applications, with full EMC compliance to CISPR 32 Class B.
- Registered and approved under EESS - Reg. No. E2025004894: Fully compliant with Australian and New Zealand Electrical Equipment Safety System requirements, simplifying compliance for installers, specifiers, and electrical inspectors.
- Backward compatible with original PBB2S Series mechanical layout: Designed with matching physical dimensions and mounting points, allowing for simple retrofit or replacement in existing enclosures without design modification or rewiring.
- Integrated safety, diagnostics, and low-maintenance operation features: Includes output overvoltage and overcurrent protection, battery reverse polarity protection, LED and form-C relay indicators, natural convection cooling, and a self-resetting battery fuse.
Specifications
| INPUT | |
|---|---|
| Nom. Input Voltage | 115 / 240Vac |
| Input Voltage Range | 90...264Vac |
| Nominal Frequency | 50/60Hz |
| Input Current |
PBB2S-13-3.5 MKII: 1.7A PBB2S-13-7 MKII: 2.3A PBB2S-28-3.5 MKII: 2.3A |
| OUTPUT - AC MAINS OPERATION | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
| Output Voltage | 13.8Vdc | 13.8Vdc | 27.6Vdc |
| Output Current | 3.25A | 6.0A | 3.0A |
| Ripple & Noise¹ | <120m Vp-p | <120m Vp-p | <150m Vp-p |
| Short Circuit Protection | Hiccup, Non-Latching | ||
| Overload Protection | Hiccup, Overcurrent Protection <175% of Rated Current | ||
|
Overvoltage Protection |
Shutdown, Latching: 16.5V - 21V | Shutdown, Latching: 33.0V - 40.5V | |
|
Notes |
¹BW = 20MHz, AC coupled, measured in parallel with a 0.1 μF ceramic capacitor and a 47μF electrlytic capacitor. | ||
| BATTERY - EXTERNAL | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
| Chemistry | Lead Acid | ||
| Battery Voltage | 12V Battery (13.8Vdc Float) | 12V Battery (13.8Vdc Float) | 24V Battery (27.6Vdc Float) |
| Charger Type | Current Limited, Taper Charger | ||
| Battery Charging Current Limit² | 0.25A | 0.5A | 0.35A |
|
Notes |
² Measured at 10.V or 20.0V (12V or 24V battery), T=25°C | ||
| OUTPUT - BATTERY OPERATION | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
|
Voltage Drop (Typ. Battery to Output) |
0.47Vdc | 0.55Vdc | 0.47Vdc |
| Short Circuit Protection | Yes - via self-resetting battery fuse | ||
| Battery Reverse Polarity Protection | Yes - Indefinite | ||
| DISPLAY / ALARMS | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
| Mains / DC OK | Green LED: ON = OK Form-C Contact, 30Vdc/7A |
||
| Battery OK | Green LED: OFF = Vbatt <10.5V ON = Vbatt >11.5V Form-C Contact, 30Vdc/7A |
Green LED: OFF = Vbatt <21.0V ON = Vbatt >23.0V Form-C Contact, 30Vdc/7A |
|
| Battery Fuse Fail | Red LED: ON = FAIL | ||
| STANDARDS | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
| Safety | AS/NZS 61558.1; AS/NZS 61558.2.16; AS/NZS 62368.1 | ||
| Short Circuit Protection | SMPS incorporating a short-circuit-proof safety isolating transformer | ||
| Electric Shock Protection | Class I | ||
| Overvoltage Category | II | ||
| Pollution Degree | 2 | ||
|
Isolation |
Input to Output - 4.0 kVac, 1min Input to Ground - 2.0 kVac, 1 min Output to Ground - 500 Vac, 1 min Alarms to Output and Grounding - 500 Vac, 1min |
||
| EMC | AS/NZS CISPR 32 Class B | ||
| MECHANICAL AND ENVIRONMENTAL | |||
|---|---|---|---|
| PBB2S-13-3.5 MK II | PBB2S-13-7 MK II | PBB2S-28-3.5 MK II | |
| Case Size | 219 x 115 x 62mm (LxWxH) | ||
| Weight | 600g | 670g | 670g |
| Operating Temperature | -10°C ≤ T ≤ 70°C | ||
| Output Power D-Rating | -2.9% / °C for T ≥ 40°C | ||
| Cooling | Via Natural Convection | ||
| Overtemperature Protection | Shutdown - Latching | ||
|
Protection Index |
IP20 |
||
| Environment | For indoor use only | ||
Selection Table
| SELECTION TABLE | ||||
|---|---|---|---|---|
| Model Number | Output Voltage | Output Current | Battery Voltage | Battery Charge Current Limit |
| PBB2S-13-3.5 MK II | 13.8Vdc | 3.25A | 12Vdc | 0.25A Typ |
| PBB2S-13-7 MK II | 13.8Vdc | 6.0A | 12Vdc | 0.5A Typ |
| PBB2S-28-3.5 MK II | 27.6Vdc | 3.0A | 24Vdc | 0.35A Typ |
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.
FAQs
Related Products
- Wall Mounted Security Enclosure
- Accepts PBB2S, PB256, PB356 and PB251A Series DC-UPS / Battery Chargers
- Designed for 7Ah to 17Ah battery
- 10x 1A Resettable PPTC Fused Outputs
- Compact DIN-Rail Mount Power Module
- LED Status Indicators for Each Output
- 8x 1A Glass Fused Outputs with status LEDs
- DIN Rail Mount with Fire Trip Interface
- Field-Selectable Fire/Standard Power Outputs
- Quick-Connect End-of-Line Module
- Multiple Resistor Values Available with Colour Coding
- Push-In Terminals for Fast Install