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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
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Data Sheet
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Available models:

DS-PR531-3A
DS-R5PSU-3A
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DS-PR531-3A
Data Sheet

Specification

  • 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
*Product performance is based on testing in a controlled environment. Your results may vary due to several external and environmental factors.

Specification

Outputs
Auxiliary Power Output
1
On-board sounder output
1
Bus interconnection
Bus-extender
Yes
Bus technology
Half-Duplex RS-485
Bus wiring
4-Core Alarm Cable (at least 2×0.5mm²+2×0.22mm²)
Power supply - general
PS type
Type A
Quiescent current
75 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 capacity
15 VDC 5 A (0.5 A dedicated to battery)
Power supply - auxiliary power supply
Battery pack
1 × rechargeable sealed lead-acid (SLA) battery (not included by default)
Battery capacity
12VDC, up to 7Ah (≥ 5600 mAh in charged state)
Recommended battery
OUTDO OT7-12 (7Ah), Yuasa NP7-12FR (7Ah)
Battery stand-by
Up to 12 hrs
Recharge period
24 hrs to 80% (5600 mAh)
Floating voltage
13.8VDC
Low energy voltage
11.60±0.5 V (Restore when rise above 11.74±0.5 V)
Cut-off voltage
11.0 VDC for deep-discharge protection
Power supply - general output
Total output capacity
Nominal 14.5VDC 4 A, range 10.7-15 VDC with up to 120 mV ripple (VPP)
Total output protection
4 A resettable eFuse
Power supply - auxiliary power output
Output protection
3 A resettable eFuse
Power supply - Bus power output
Output protection
(Shared AUX power output)
Power supply - sounder power output
Output protection
3 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 humidity
10% ~ 90% non-condensing
Physical
Dimension (W × H × D)
360 mm × 260 mm × 96.3 mm
1500 g
Tamper-proof
Front and Rear
Installation method
Wall mount
Compliance
Electrical conformity
CE, CB
EN 50131
Security Grade 2, Environmental Class II
For better user experience, we highly recommend you to update your device to the latest firmware asap.
Specification
Outputs
  • Outputs
  • Outputs
Bus interconnection
  • Bus interconnection
  • Bus interconnection
  • Bus interconnection
Power supply - general
  • Power supply - general
  • Power supply - general
Power supply - primary power supply
  • Power supply - primary power supply
  • Power supply - primary power supply
Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
  • Power supply - auxiliary power supply
Power supply - general output
  • Power supply - general output
  • Power supply - general output
Power supply - auxiliary power output
  • Power supply - auxiliary power output
Power supply - Bus power output
  • Power supply - Bus power output
Power supply - sounder power output
  • Power supply - sounder power output
Environmental
  • Environmental
  • Environmental
  • Environmental
Physical
  • Physical
  • Physical
  • Physical
  • Physical
Compliance
  • Compliance
  • Compliance
*Product performance is based on testing in a controlled environment. Your results may vary due to several external and environmental factors.

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