Altronix SMP7PMCTX Supervised Power Supply/Charger

The Altronix SMP7PMCTX is a commercial-grade, supervised switching power supply and battery charger designed to provide reliable 12VDC or 24VDC power for access control, security, and video surveillance equipment. Part of the Altronix SMP7CTX Series, the unit converts 115VAC, 60Hz input power into a field-selectable 12VDC or 24VDC output rated at 6 amps continuous. It features a single filtered, electronically regulated DC output, integrated sealed lead-acid battery charging, and automatic transfer to standby battery power without an intentional voltage drop. Built-in AC failure and low-battery supervision with Form C relay contacts allows compatible monitoring systems to detect power-related trouble conditions. Additional features include short-circuit protection, thermal overload protection, an onboard power switch, and AC input/DC output LED indicators. The SMP7PMCTX is housed in a BC300 indoor wall-mount steel enclosure with space for up to two 12V, 7Ah backup batteries, sold separately. Backed by an Altronix lifetime manufacturer warranty, the SMP7PMCTX provides centralized, supervised low-voltage power for commercial access control panels, CCTV equipment, security system accessories, and related electronic installations.

Altronix SMP7PMCTX 12/24VDC 6A Supervised Power Supply and Battery Charger

The Altronix SMP7PMCTX Supervised Power Supply and Charger provides regulated low-voltage DC power with integrated battery backup and fault supervision for commercial electronic security installations. Manufactured by Altronix as part of the SMP7CTX Series, this enclosed power supply converts standard 115VAC electrical input into a field-selectable 12VDC or 24VDC output with a maximum continuous load capacity of 6 amps. The single-output design supports compatible access control panels, electronic locking equipment, video surveillance accessories, intrusion alarm equipment, and other security devices requiring a stable DC power source. Unlike basic power supplies that provide only voltage conversion, the SMP7PMCTX incorporates automatic battery charging, standby power transfer, AC power failure monitoring, and low-battery supervision to support continuous equipment operation and remote notification of electrical trouble conditions. Its integrated transformer, regulated power supply board, and lockable indoor metal enclosure create a centralized power solution for offices, warehouses, educational facilities, commercial buildings, and institutional security systems.

The SMP7PMCTX operates from a 115VAC, 60Hz input rated at 2.5 amps and delivers a filtered, electronically regulated DC output selectable between 12 volts and 24 volts, with a maximum continuous output current of 6 amps at either voltage. The selected output voltage is configured through an onboard switch, allowing installers to match the supply to compatible connected equipment. The switching power supply incorporates short-circuit protection and thermal overload protection to help protect its output circuitry during abnormal electrical conditions. Its integrated battery charging circuit supports sealed lead-acid or gel-cell rechargeable batteries and provides a maximum charging current of 0.7 amps. The unit includes a dedicated power ON/OFF switch, an AC input status indicator, and a DC output LED indicator for local troubleshooting. The standard BC300 steel enclosure accommodates up to two 12V, 7Ah backup batteries and includes combination electrical knockouts for field wiring. Altronix's current product page lists approximate enclosure dimensions of 13 inches high, 12.5 inches wide, and 3.25 inches deep, with a product weight of approximately 8.3 pounds. The power supply is specified for indoor operation at temperatures from 32 F to 120 F (0 C to 49 C), making it suitable for controlled commercial equipment rooms and electrical or security closets.

For supervised security power applications, the Altronix SMP7PMCTX provides Form C relay contacts for AC failure and low-battery status monitoring, allowing compatible security panels, access control systems, and supervisory equipment to detect abnormal power conditions. These dry-contact outputs can be connected to appropriately configured monitoring inputs to generate trouble notifications when the primary AC supply is lost or the backup battery reaches the manufacturer's defined low-voltage threshold. The power supply also supports battery presence supervision as described in the SMP7CTX Series installation documentation. During a primary power interruption, the integrated backup circuit transfers the connected load to the installed standby batteries without an intentional voltage drop during switchover, reducing interruption to compatible connected devices. The battery charger automatically maintains the rechargeable battery arrangement when AC power is available. The single 6-amp DC output is intended for direct connection to compatible equipment or to a separately specified power distribution module. Unlike the SMP7PMP4, SMP7PMP8, and SMP7PMP16 configurations, the standard SMP7PMCTX does not include factory-installed four-, eight-, or sixteen-output distribution boards. Its supervised design is particularly useful for commercial security installations requiring fault reporting, battery-backed power, and integration with existing monitoring systems.

Installation of the Altronix SMP7PMCTX enclosed switching power supply involves securely mounting the BC300 cabinet in an appropriate indoor location, connecting the designated 115VAC branch circuit, selecting the required DC output voltage, and wiring compatible electrical loads to the regulated output terminals. The manufacturer recommends verifying the configured output voltage with a meter before connecting sensitive electronic devices to avoid damage from an incorrect voltage setting. The unit includes wiring provisions for AC power, grounding, supervised trouble contacts, and backup battery connections. For 12VDC applications, an appropriate 12V battery arrangement is used; for 24VDC operation, two compatible 12V batteries are connected in series to provide the required standby supply voltage. The enclosure accommodates up to two 7Ah batteries, while battery capacity and backup runtime must be selected according to the connected load and required standby duration. Installers can wire the AC failure and low-battery Form C contacts to compatible monitoring equipment and confirm supervisory operation during system commissioning. Routine maintenance includes checking DC output voltage, battery condition, connection integrity, status indicators, and the transfer to standby operation. The SMP7PMCTX differs from the board-only SMP7PM, which requires a separate low-voltage AC transformer, because the enclosed SMP7PMCTX includes the transformer assembly for connection to a 115VAC supply. Backed by an Altronix lifetime warranty, the SMP7PMCTX combines regulated 12/24VDC power delivery, 6-amp continuous capacity, automatic standby battery operation, and supervised power monitoring for commercial electronic security systems.