Altronix MAXFIT33E Dual-Channel 12/24VDC Power Supply

Altronix MAXFIT33E Dual Power Supply Expandable Power System

Overview

The Altronix MAXFIT33E is a dual-channel expandable power distribution system designed for security integrators and IT professionals deploying distributed access control, surveillance, and intercom infrastructure. The MAXFIT33E delivers selectable 12VDC or 24VDC output on two independent 6-ampere channels, allowing simultaneous operation of mixed-voltage loads from a single compact enclosure. The system ships pre-assembled in the BC750 steel enclosure, providing DIN-rail or wall-mount deployment flexibility for both retrofit and new-build installations.

Key Features

• Dual Independent Outputs: Two isolated 6-ampere channels, each selectable for 12VDC or 24VDC operation, eliminating the need for separate single-channel supplies in mixed-voltage deployments
• Expandable Architecture: MaxFit33E design enables stacking and daisy-chaining for scalable power distribution across multi-floor or multi-zone security systems
• Output Current Rating: 6A per channel supports access control readers, door strikes, intercoms, camera modules, and auxiliary control circuits simultaneously
• Voltage Selection: Per-channel voltage selection accommodates legacy 12VDC and modern 24VDC IoT and IP device standards without requiring external converters
• BC750 Enclosure: Steel powder-coat construction with DIN-rail mounting provision; compact form factor fits standard electrical closets and equipment racks
• Ready-to-Deploy: Ships fully assembled and wired, reducing field labor and commissioning time on projects with tight installation schedules

Integration & Compatibility

The MAXFIT33E is widely deployed in Altronix integrated access control and CCTV ecosystems. Each 6A output channel is compatible with Altronix VertiLine intercom modules, card readers, electric strikes, and mag-locks operating at 12VDC or 24VDC. The expandable design makes the MAXFIT33E suitable for phased rollouts and system upgrades where additional power channels can be added without full system replacement. Integrators commonly pair the MAXFIT33E with Altronix supervision modules and battery backup systems for mission-critical door control and alarm circuits.

Ted Perry

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

I've specified the Altronix MAXFIT33E on multiple multi-building access control projects where voltage standardization was a challenge. The dual independent 6A channels and per-channel voltage selection eliminate costly converter modules and redundant supply units. The expandable MaxFit33E platform scales cleanly as facilities add reader banks or intercom zones over time.

Technical Highlights:

• Dual 6A Channels: Two independent power rails eliminate voltage conflicts when mixing 12VDC and 24VDC loads in the same control cabinet
• Expandable Design: MaxFit33E stacking capability allows linear power scaling without cabinet re-engineering or UPS battery resizing

Deployment Considerations:

• Plan cable gauge for 6A continuous draw per channel; use 12 AWG minimum for runs exceeding 50 feet to minimize voltage sag
• Position the BC750 enclosure close to high-current loads (electric strikes, mag-locks) to reduce voltage drop and improve response reliability

The MAXFIT33E is a practical choice for integrators who need voltage flexibility without adding enclosure real estate. Specify it when your bill of materials includes both legacy 12VDC and modern 24VDC devices in the same access control or intercom subsystem.