3A power supply in a box for BUS modules of the hybrid alarm system; maximum backup battery capacity 7Ah; 1 siren output; supports cascade connection; double tamper protection; Power supply: 100-240V 50/60Hz. PVC box with dimensions: 360x260x96.3 mm

DS-PR531-3A

Bus Power Supply Unit (3A)

Delivers stable power to all connected system devices

3A AUX output (shared with bus power) for detectors and peripherals

3A dedicated siren output for reliable alarm notification

Total combined output up to 4A (AUX/Bus + Siren)

Built-in bus extender for extended bus range

Supports expander slots for flexible system expansion

Backup battery support (7Ah) for uninterrupted operation

Outputs

Auxiliary Power Output1

On-board sounder output1

Bus interconnection

Bus-extenderYes

Bus technologyHalf-Duplex RS-485

Bus wiring4-Core Alarm Cable (at least 2×0.5mm²+2×0.22mm²)

Power supply - general

PS typeType A

Quiescent current75 mA @15VDC (when on battery without external load)

Power supply - primary power supply

Mains Input~ 100-240V 50/60Hz, 1.4 A typ. @115 VAC, 0.85 A typ. @ 230 VAC

Power supply capacity15 VDC 5 A (0.5 A dedicated to battery)

Power supply - auxiliary power supply

Battery pack1 × rechargeable sealed lead-acid (SLA) battery (not included by default)

Battery capacity12VDC, up to 7Ah (≥ 5600 mAh in charged state)

Recommended batteryOUTDO OT7-12 (7Ah), Yuasa NP7-12FR (7Ah)

Battery stand-byUp to 12 hrs

Recharge period24 hrs to 80% (5600 mAh)

Floating voltage13.8VDC

Low energy voltage11.60±0.5 V (Restore when rise above 11.74±0.5 V)

Cut-off voltage11.0 VDC for deep-discharge protection

Power supply - general output

Total output capacityNominal 14.5VDC 4 A, range 10.7-15 VDC with up to 120 mV ripple (VPP)

Total output protection4 A resettable eFuse

Power supply - auxiliary power output

Output protection3 A resettable eFuse

Power supply - Bus power output

Output protection(Shared AUX power output)

Power supply - sounder power output

Output protection3 A resettable eFuse

Environmental

Operating temperature-10°C to 50°C (14°F to 122°F), indoor use only

Storage temperature -20°C to 60°C (-4°F to 140°F)

Relative humidity10% ~ 90% non-condensing

Physical

Dimension (W × H × D) 360 mm × 260 mm × 96.3 mm

1500 g

Tamper-proofFront and Rear

Installation methodWall mount

Compliance

Electrical conformityCE, CB

EN 50131Security Grade 2, Environmental Class II