Bell 840 12V DC 4 Amp Backup Power Supply

Bell 840 Power Supply with Battery Backup is a high-capacity 13.8V nominal unit designed for large-scale door entry and video intercom systems, ensuring continuous security during main power failure.

The Model 840 power supply delivers a regulated 13.8V DC nominal output, providing 3A of continuous current with a 4A peak capacity. Designed for protected indoor environments, it features an integrated management system for a lead-acid standby battery (shipped separately). In the event of a power outage, the unit ensures an instant transition to battery power to maintain system integrity. The robust metal cabinet is vented to prevent gas build-up and must be securely wall-mounted. For safety, the unit includes high-breaking capacity (HBC) ceramic fuses for the mains and glass fuses for the battery circuit to protect against overcurrent and short circuits.

Features

• High-Current Performance: Delivers 3A continuous and up to 4A peak current, making it ideal for powering multiple entrance panels and heavy-duty locking hardware.
• Advanced Battery Management: Includes dedicated leads with spade terminals for easy connection to a standby battery, featuring correct polarity marking and a vented cabinet design.
• Comprehensive Circuit Protection: Equipped with a T2A HBC ceramic mains fuse and an F4A glass battery fuse to ensure compliance with BS EN 60127 safety standards.
• Regulated Output Stability: Maintains a 13.8V nominal supply to protect sensitive intercom electronics from voltage fluctuations and noise.
• Durable Vented Enclosure: The 350mm wide cabinet provides ample space for wiring and heat dissipation, ensuring reliable operation within a 0 ºC to 50 ºC temperature range.

Dimensions
• 350 x 330 x 80 (hwd mm)