Lifesafety Power RD250/250-16 Rackmount Dual Voltage DC Power Supply

Overview

The RD250/250-16 is a rackmount DC power supply delivering simultaneous 12V at 20A and 24V at 10A — solving the mixed-voltage problem in access control and surveillance infrastructures where door locks, readers, and cameras operate on different rails. The 16 dedicated egress lock outputs simplify wiring and reduce relay clutter by eliminating the need for external distribution panels. This is the core power backbone for mid-sized security installations combining IP cameras, magnetic locks, electric strikes, and request-to-exit devices on a single rack.

Compatibility

The RD250/250-16 pairs with any 24V magnetic lock, electric strike, or door controller rated for continuous duty. The 12V output supports legacy surveillance equipment and 12V access control readers. The 16 egress outputs are field-configurable for fail-secure (power-down locks) or fail-safe (spring-release latches) operation, making it compatible with standard request-to-exit (RTE) circuits in access control systems from major vendors including Honeywell, Lenel, and Salto. Verify your lock voltage and amperage draw before installation — 24V outputs are current-limited to 10A total.

Installation Notes

Mount horizontally in a standard 19-inch rack; depth is approximately 6–8 inches depending on enclosure variant. The unit draws AC input power (typically 120/240V switchable) and requires a dedicated circuit breaker rated for the total load. Wire the 12V and 24V commons to the same ground bus to avoid floating-ground issues that cause nuisance locks. The 16 egress outputs are normally open relay contacts rated for resistive loads up to 2A per contact; inductive loads (solenoid coils) require external suppression diodes to prevent relay damage. Test lock release time under full load before finalizing wiring — voltage drop across long runs to remote readers can exceed 3V and prevent solenoid actuation.