SDC 631 Series - 1.5 Amp Regulated & Filtered Low Voltage Power Supply

SDC 631RF Series Power Controllers – Filtered DC Power for Access Control Systems

The SDC 631RF series of DC power controllers is specifically engineered to meet the unique and demanding power requirements of electronic access control systems. With a hybrid linear/switching power supply design, the 631RF provides highly regulated and filtered low-voltage DC output—ideal for supporting electric locks, maglocks, door hardware, and life safety equipment.

Unlike traditional power supplies, the SDC 631RF addresses common issues such as voltage spikes and current instability—responsible for up to 85% of technical support calls and access control failures. This model delivers steady, clean power to protect sensitive circuitry in access control panels and locking devices.

Models Available

• SDC 631RF – 1.5 Amp DC Power Controller with Cabinet

• SDC 631RFA – 1.5 Amp DC Power Controller with Large Cabinet

• SDC 631RFL – 1.5 Amp DC Power Controller Less Cabinet (for panel integration)

Standard Features

• Regulated and filtered linear DC power output

• Dual voltage field selectable (12VDC or 24VDC)

• Class 2 power output – suitable for low-voltage system installations

• Surge protection on both input and output lines

• Fire/emergency release input for override during fire alarm activation

• Visual LED status indicator

• Isolated battery charging circuit with low battery disconnect

• Enclosures include pre-configured control module mounting holes (RF and RFA models only)

Ideal Applications

• Multi-door access control systems

• Maglocks, electric strikes, and electric latch retraction devices

• Fail-safe / fail-secure electric locking hardware

• Integration with fire alarm and life safety systems

Access Control Power Insight

Access control systems differ from video or security alarm systems in that they draw significantly more current during locking and access cycles. The SDC 631RF provides reliable, regulated current to prevent issues caused by "dirty power," transients, or load surges—ensuring optimal system performance and hardware longevity.

CERTIFICATIONS

UL 294 Access Control System Units
UL 603 Power Supplies for Use with Burglar-Alarm Systems
ULC-S318 Power Supplies for Buglar Alarm Systems

RESOURCES

631RF-Datasheet.pdf (sdcsecurity.com)

SDC WEBSITE