Key Features
- Intelligent “On-Demand” Load Sharing
- Advanced Battery Impedance Monitoring
- Electronic “E-Fuse” Technology
- Optional Real-Time Performance Monitoring
- Temperature-Compensated Charging
Overview
The Dycon D234x Series isn’t just a power source; it’s the heart of a dependable fire alarm system. Fully certified to EN54-4:1997 +A1:2002 +A2:2006 and EN54-2, these switch-mode power supply units (PSUs) offer unparalleled reliability for fire detection, voice alarm, and smoke control systems across the UK and Europe.
Why Choose the Dycon D234x Series?
Maintaining a fire system requires precision and maximum uptime. The D234x series is engineered to minimise “nuisance” service calls and protect your battery investment through sophisticated microprocessor control.
- Intelligent “On-Demand” Load Sharing
- The PSU dynamically shifts power between the system load and battery charging. If the system requires a sudden burst of current, the PSU prioritises the load without compromising the battery health.
- Precision Battery Care
- By monitoring Battery Impedance rather than just voltage, the unit identifies failing batteries before they cause a system fault. This proactive approach significantly reduces emergency maintenance costs and site visits.
- Self-Healing E-Fuse Technology
- Forget the hassle of blown glass fuses. Our intelligent electronic fuses (E-Fuses) automatically reset once a fault is cleared, keeping the system online and saving engineers from unnecessary component replacements.
- Real-Time Monitoring
- Customise your setup with the optional digital display for instant diagnostics—check voltage, current, and resistance at a glance without needing a multimeter.
Turntable
D2431-7 & D2433-7
D2433-17 & D2435-17
Approvals
The Dycon D234x Series is rigorously tested and independently certified to meet the highest European standards for fire detection and fire alarm systems. This ensures full compliance with building regulations and insurance requirements.
- EN54-4:1997 +A1:2002 +A2:2006: Power supply equipment for fire detection and fire alarm systems.
- EN54-2: Control and indicating equipment (where applicable to power requirements).
- CE & UKCA Marked: Fully compliant with all relevant European and UK safety and electromagnetic compatibility (EMC) directives.
Tech Specs
| Voltage | 230Vac +10% -15%; 50Hz ± 15% |
| Max. AC Input Continuous Current | D2431: 0.45A D2433: 0.9A D2435: 1.5A |
| Recommended Fused-Spur Input Fuses | D2431: 250V T1A D2433: 250V T3.15A D2435: 250V T3.13A |
| Output Voltage with AC Power | Minimum: 26Vdc Maximum: 29.5Vdc Nominal |
| Output Ripple | <0.07V Peak-to-Peak at Full Rated Output |
| Maximum Output Current at Full Load | D2341: 1.5A D2343: 3A D2345: 5A |
| Battery Charging Voltage & Charging Current | 27.6Vdc On-Demand (Maximum) D2431: 1.5A D2343: 3A D2345: 5A |
| Type of Batteries Required | D2431-7 & D2433-7: 2 x 12Vdc 7 or 8Ah Sealed Lead Acid Batteries D2433-17 & D2435-17: 2 x 12Vdc 17Ah Sealed Lead Acid Batteries |
| Standby Output Voltage | Minimum: 21Vdc Maximum: 27.6Vdc |
| PSU Standby Current | 32mA |
| Over-Voltage Cut-Out Threshold | 30Vdc 2% |
| Low-Voltage Power Output Fault | <22Vdc ±2% Low Voltage Restore >23Vdc ±2% |
| Battery Deep Discharge Voltage Limit | 21Vdc ±2% |
| Output Monitoring Threshold | Battery Charging Voltage <±2% |
| Battery Fuse | 6A PTC Non-replaceable |
| Fault Opto-Relays | 3 x Normally Closed (NC) or NO with Jumper Setting, 100mA at 60V On-Resistance 16 Ohms Maximum 1500VRMS Isolation Voltage AC Power Fail, Battery Fault, PSU Fault |
| Operating Temperature Range | -10˚C to +40˚C |
| Humidity | 95% Non-condensing |
| Dimensions (W x H x D) | D2431-7 & D2433-7: 295mm x 330mm x 90mm D2433-17 & D2435-17: 379mm x 394mm x 90mm |