Dycon EN54-Certified 24V 3A Power Supply Unit (D2433-7)

The Dycon D2433-7 is a 3A, 24V DC fire alarm power supply unit that is certified to EN54-4 and meets the Construction Products Regulation (CPR). It comes in a medium steel housing with space for two 12V 7Ah (or 8Ah) sealed lead-acid batteries, which makes it suitable for smaller fire detection systems.

Key features

• EN54-4 and CPR certified, housed version
• Microprocessor-controlled operation and protection
• On-demand battery charging and load output current sharing
• Monitors the impedance of each battery, not just its voltage
• On-board temperature sensor adjusts the charge rate; optional remote sensor (D-TEMP-01)
• Two independent, electronically fused, switched 24V DC outputs
• Three opto-relay fault outputs: AC power fail, battery fault and PSU fault
• Automatic output reconnection after a short-circuit fault; no user-serviceable fuses
• Over-voltage output protection
• UK-manufactured electronics and steel housings

Technical specifications

• Input voltage: 230V AC +10% / -15%, 50Hz
• Maximum AC input continuous current: 0.9A
• Recommended fused-spur fuse: 250V T3.15A
• Output voltage with AC power: 26V DC min, 29.5V DC max
• Maximum output current: 3A
• Output ripple: less than 0.07V peak-to-peak at full rated output
• Battery charging voltage: 27.6V DC, on demand (up to 3A)
• Standby output voltage: 21V DC min, 27.6V DC max
• PSU standby current: 32mA
• Fault opto-relays: 3 x NC (or NO by jumper), 100mA at 60V
• Operating temperature: -10°C to +40°C
• Humidity: 95% non-condensing
• Batteries: 2 x 12V DC 7Ah or 8Ah sealed lead-acid (not included)
• Housing (H x W x D): 330 x 295 x 90mm
• CPR: 0359-CPR-00434