Powerbox 13.8VDC 3.5A Power Supply with Battery Charging – AC Fail and Low Battery Monitoring – PBB2S-13-3.5 MKII
The Powerbox PBB2S MKII Series DC-UPS battery charger is engineered for security and access control systems requiring reliable regulated direct current power with uninterrupted battery backup capability.
Designed as a direct replacement for earlier PBB2S models, the MKII series maintains identical mounting points, footprint and electrical characteristics, ensuring seamless upgrades in existing installations.
The unit provides mains monitoring, battery supervision and fault indication outputs, making it suitable for critical security applications.
Key Features
- 13.8VDC regulated output.
- 3.5A maximum load capability.
- Integrated battery charging circuit.
- AC fail and battery monitoring outputs.
- Overcurrent, short circuit and overvoltage protection.
- Form-C relay outputs for status signalling.
- Natural convection cooled aluminium enclosure.
- Indoor installation only.
Specifications
| Parameter | Specification |
|---|---|
| Output Voltage | 13.8VDC |
| Output Current | 3.5A Maximum |
| AC Input | 115 to 240VAC Nominal |
| Monitoring Outputs | Mains/DC OK, Battery OK, Battery Fuse Fail |
Dimensions
| Measurement | Size (mm) |
|---|---|
| Height | 219 |
| Width | 114.7 |
| Depth | 62 |
PDF Resources
Frequently Asked Questions
- Does this unit provide battery backup?
Yes. It automatically switches to battery operation during mains failure. - Can it replace older PBB2S units?
Yes. The MKII maintains identical mounting points and electrical performance. - Is this suitable for outdoor use?
No. The PBB2S series is designed for indoor installation only.
Additional Information
- Status relay outputs allow integration with monitoring systems.
- Commonly installed in alarm, access control and communications cabinets.
- Installation should be completed by a licensed technician.
Technical Drawing
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