Name: SDC 631 Series 1.5 Amp Regulated & Filtered DC Power Controller with Dual Voltage Selection
Brand: SDC
SKU: 631RFXPS-1XPCXKL
Price: 314.81 USD
Availability: InStock

Product Overview
FAQs

SDC 631RF Series 1.5 Amp Regulated & Filtered DC Power Controller with Dual Voltage Selection

Professional DC Power Controller for Access Control Systems

The SDC 631RF Series DC Power Controller delivers highly regulated and filtered low-voltage DC output specifically engineered for electronic access control systems. This 1.5 amp power controller features dual voltage field selectable operation (12VDC or 24VDC) with hybrid linear/switching power supply design to provide steady, clean power for electric locks, maglocks, door hardware, and life safety equipment. Available in three configurations including cabinet models (631RF, 631RFA) and panel integration model (631RFL), this power controller addresses voltage spikes and current instability issues responsible for up to 85% of access control technical support calls.

Professional Features & Benefits

Dual Voltage Operation: Field selectable 12VDC or 24VDC output provides flexibility for various access control system requirements and device compatibility.
1.5 Amp Current Capacity: Reliable 1.5A output delivers sufficient power for multi-door access control systems and high-current locking devices.
Regulated and Filtered Output: Hybrid linear/switching power supply design provides highly regulated and filtered DC power to protect sensitive circuitry in access control panels and locking devices.
Surge Protection: Built-in surge protection on both input and output lines prevents damage from voltage spikes and transients that cause system failures.
Fire/Emergency Release Integration: Dedicated fire/emergency release input enables automatic override during fire alarm activation for life safety compliance.
Class 2 Power Output: UL Class 2 rated output suitable for low-voltage system installations with simplified wiring requirements.
Battery Backup Support: Isolated battery charging circuit with low battery disconnect ensures continued operation during power outages.
Multiple Configuration Options: Available as 631RF with cabinet, 631RFA with large cabinet, or 631RFL less cabinet for panel integration flexibility.

Technical Specifications

Commercial/Residential: Commercial
Current: 1.5A
Department: Door Hardware
Electronic: Yes
PDF:SDC Full Catalog: https://zensupply.com/content/pdf/lcn/CondensedHardwareBrochure
Product Category: Electronic Access Controls
Product Group: Electronic Access Controls
Product Model: 631RF, 631RFA, 631RFL
Product Subgroup: Controllers, Power Supplies and Transformers
Product Type: Power Supplies
Product Voltage: 120V
Series: 631 Series
Subcategory: Power Supply
Tags: sdc 631rf

Professional Applications

Multi-Door Access Control Systems
Commercial Building Security Systems
Healthcare Facility Access Control
Educational Institution Safety Systems
Industrial Facility Monitoring
Fire Alarm and Life Safety System Integration
Electric Lock and Maglock Power Distribution

Why Choose SDC Quality?

SDC 631RF Series power controllers deliver professional-grade reliability with hybrid linear/switching power supply design and surge protection on both input and output lines. UL 294, UL 603, and ULC-S318 certified for access control and burglar alarm system applications. Engineered specifically to address the demanding power requirements of access control systems where clean, regulated power is essential for optimal performance and hardware longevity.

Manufacturer Resources

SDC Full Catalog

Product Specs

Subcategory:: Power Supply
Series:: 631 Series
Product Group:: Electronic Access Controls
Product Subgroup:: Controllers, Power Supplies and Transformers
Commercial/Residential:: Commercial
Product Type:: Power Supplies
Electronic:: Yes
Current:: 1.5A
Tags:: sdc 631rf
Product Model:: 631RF, 631RFA, 631RFL
Product Voltage:: 120V
Product Category:: Electronic Access Controls
Department:: Door Hardware

SDC 631RFXPS-1XPCXKL – Frequently Asked Questions

1) Can the SDC 631RF power supply run 12VDC and 24VDC locks?

The 631RF is field selectable between 12VDC and 24VDC output, so you set it on site to match whatever lock you are feeding. It is one output voltage at a time, though, not both at once. If you have 12V strikes on some doors and 24V maglocks on others off the same supply, you either standardize the locks or add the X12VR voltage control regulator module to pull a regulated 12VDC leg. Input is 120V.

2) Is 1.5 amps enough to run my maglocks and electric strikes?

1.5A total is the ceiling on the 631 Series, and that is the number to budget against. Typical single maglocks and strikes draw a few hundred milliamps each, so a small cluster of doors fits; motorized latch retraction devices and larger mag arrays do not. If your load math runs past 1.5A, step up to something like the Von Duprin PS902 at 2A, the RCI DKPS-2A at 12/24VDC 2A, or the BEST PS161-6 at 6A. Add up the inrush draw of every device on the supply, not just the holding current.

3) What is the difference between the SDC 631RF, 631RFA and 631RFL?

All three are the same 1.5A regulated and filtered DC supply; the difference is the housing. 631RF ships in a cabinet, 631RFA in a large cabinet (the extra room is what lets you mount add-on relay modules and batteries), and 631RFL is the board less cabinet for dropping into an existing access control panel or an enclosure you already have. Pick RFL only if you have somewhere UL-appropriate to put it, since it arrives with no enclosure of its own.

4) Will an SDC 631 power supply drop the mags on a fire alarm signal?

There is a dedicated fire/emergency release input on the 631RF that kills power to the locks when the alarm system trips it. That is what gets maglocks released for egress. How the doors come back is an ordering choice: specify the fire/emergency release manual reset switch and the supply stays down until somebody physically resets it at the cabinet, which is what a lot of AHJs want on a mag-locked opening. Without that option it restores automatically when the alarm input clears.

5) How do I control multiple doors off one SDC 631 power supply?

Relay modules mount into the 631 cabinet and do the switching. The choices are XUR-1 (microprocessor controller, two relays), XUR2-4 (four relays), XUR4-8 (eight relays), XCR4 four station control relay, XACM-1 six station input control relay, XFB4 multiple fused output relay for splitting the supply into protected legs, and XEMC exit device sequencer for sequencing electrified exit hardware. All of them share the same 1.5A budget, so the relay count is about how many doors you switch, not how much power you have.

6) Is the SDC 631RF UL listed for access control?

UL 294, UL 603 and ULC-S318 certified, which covers access control and burglar alarm system use, and the DC output is UL Class 2. Class 2 is why the low-voltage runs off this supply do not need conduit under most installations. For a healthcare, school or government job where the submittal has to name a standard, those are the listings to put on it.

7) Can I use the SDC 631RF to power a motorized latch retraction exit device?

Use a supply built for that duty instead. The BEST RPSMLR2 Series is a power supply for motorized latch retraction exit devices, and the BEST PS161-6 is a 120V input, 12/24V output supply with 6A capacity for delayed egress exit devices. The SDC 631 Series is a 1.5A regulated and filtered DC controller for access control locking hardware and life safety equipment - motor latch retraction inrush is a different current profile than that rating addresses.

8) What is the closest 12/24VDC field-selectable substitute for the SDC 631RF at a higher current rating?

The Von Duprin PS902 base power supply is the nearest step up in the same job: it is field selectable 12 or 24 VDC like the SDC 631 Series, and it is rated 2A where the SDC 631 delivers 1.5A. Both are built to power access control locking hardware from a boxed supply. If you have already sized the load and 1.5A is tight, the PS902 covers the same dual-voltage selection with more headroom.

9) I need a 12/24VDC supply with battery backup instead of the SDC 631 - what else does that?

Two peers carry battery backup in the model description. The Adams Rite PS-1 is a regulated 1 amp 12/24 volt DC supply with battery backup. The Command Access PS204/204B is a linear supply with 2A at 24VDC and battery backup. The SDC 631 Series runs 1.5A with dual voltage field selection between 12VDC and 24VDC, so the PS-1 matches its voltage flexibility at lower current and the PS204/204B is a 24VDC-only path at higher current.

10) The SDC 631RF is not enough current for my maglock bank - what do I use for a large multi-door run?

For a heavy 24VDC run the Altronix AL1024ULACMCB is a power supply and access power controller with 115VAC 60Hz input at 4.2A, eight PTC outputs and 24VDC at 10A. For a 12VDC bank the Securitron AQS1210 is a switching supply at 12 VDC 10 Amp. The SDC 631 Series is a 1.5A supply with 120V input, so once the summed lock current passes that, those two are the distribution-scale options.

11) Which peer products look like a substitute for the SDC 631RF but are not power supplies for locks?

Two to rule out. The ROFU 10305-LA/10306-LA is a tamper resistant power transfer hinge rated 1.5A at 42V - the 1.5A figure matches the SDC 631 Series rating but the hinge carries power through the door edge rather than generating it. The Command Access CAT Field Tester is a portable 12-24VDC supply that runs off DeWalt, Makita and Milwaukee batteries, which is a bench and jobsite test tool rather than a permanently installed 120V input controller.

12) Does the SDC 631RF keep the doors powered during an outage?

Battery backup is supported. The 631RF has an isolated battery charging circuit with low battery disconnect, so it charges standby batteries and cuts them loose before they are damaged by deep discharge. Batteries are a separate purchase, sized to the runtime you need against the 1.5A output. If you want the batteries inside the same box, order the 631RFA large cabinet.

13) How do I stop tenants or staff from switching off the access control power supply?

Two options on the 631 cabinet handle this. A key lock cover locks the enclosure shut so nobody gets at the board. For the power switch you choose where it lives: on/off inside the cabinet enclosure (hidden behind the locked door) or on the cabinet enclosure cover (reachable without opening it). In a mechanical room or a corridor where the public can reach it, the inside switch plus the key lock cover is the combination you want. On a supply you service often, the cover-mounted switch saves opening the box.

14) Switching or linear power supply for electric locks, which should I use?

The 631RF uses a hybrid linear/switching design with regulated and filtered output plus surge protection on both the input and output lines, so it is aimed at electronics that misbehave on dirty power. Pure switching supplies are the other common approach, and ZenSupply carries several: the Securitron AQD1 at 12/24 VDC 1 Amp is a close switching equivalent on current, and the Securitron AQL4 gives 12/24VDC at 4/3 Amp when you need more headroom. If you want a straight linear supply instead, the Command Access PS210 is 1.5A at 24VDC with boost circuitry, and the Command Access PS1 is 1 Amp at 24VDC.

15) What is a comparable 12/24VDC access control power supply to the SDC 631 with battery backup?

The closest straight equivalents ZenSupply carries are the Adams Rite PS-1, a regulated 1 Amp 12/24 volt DC supply with battery backup, and the Von Duprin PS902 base power supply at 2A 12/24 VDC field selectable for access control. The Command Access PS204/204B is a linear 2A at 24VDC with battery backup if 24V is all you need. Where the 631 differs is the packaging: it is sold with cabinet, with large cabinet, or less cabinet for panel mounting, and it takes SDC relay and controller modules inside that cabinet.

16) I need one power supply to feed eight doors with individually fused outputs. Is the SDC 631 the right box?

You can get fused distribution on the 631 by adding the XFB4 multiple fused output relay module, but every one of those legs still shares a single 1.5A supply, and eight openings will usually outrun that. For a job that size the Altronix AL1024ULACMCB is built for it: 115VAC 60Hz input at 4.2A, eight PTC outputs, 24VDC at 10A in a grey enclosure. Use the 631 where the door count is small and you want SDC controller modules in the same cabinet.

17) How does the SDC 631RF differ from the Securitron AQD1 and AQL4?

All three cover 12/24VDC. The Securitron AQD1 is a switching power supply at 12/24 VDC 1 Amp and the AQL4 is a switching supply at 12/24VDC rated 4 amps at 12V and 3 amps at 24V. The SDC 631 Series uses a hybrid linear/switching design rated 1.5A with field selectable 12VDC or 24VDC, and it is ordered with the cabinet as 631RF or 631RFA, or less cabinet as 631RFL. The AQD1 sits just under it on current, the AQL4 well above.

18) I need multiple fused or switched outputs from one supply - is the SDC 631RF the right choice?

The SDC 631 Series reaches multiple outputs through add-on door control modules such as the XFB4 multiple fused output relay, the XCR4 four station control relay, and the XUR2-4 and XUR4-8 microprocessor controllers with four and eight relays. If you would rather buy the outputs built in, the RCI DKPS-2A is a power supply with 8 outputs at 12/24VDC and 2A, and the Altronix AL1024ULACMCB provides 8 PTC outputs at 24VDC 10A.

19) I need logic and sequencing, not just power - what covers that alongside the SDC 631RF?

The Detex 10-800 Series is a universal logic controller with a 120VAC/24VDC power supply and battery backup, and the BEST ELR150 Series is a power supply control module for electronic access control. On the SDC 631 Series the equivalent is added at order time through modules such as the XEMC exit device sequencer and the XUR-1 microprocessor controller with two relays, with the 631RFL less cabinet version available when the assembly is going into an existing panel.

20) Is the SDC 631RF rated for commercial buildings or is it a residential supply?

Commercial. The 631 Series is a commercial-duty DC power controller and carries UL 294, UL 603 and ULC-S318 listings, which is what gets it accepted on healthcare, education, government and multi-family access control work. Standard supply is 120V input with the DC side set to 12 or 24 volts in the field.

How fast can I get the SDC 631RFXPS-1XPCXKL delivered?

Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.

Can I return it if it doesn’t work for me?

Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.

Does the SDC 631RFXPS-1XPCXKL come with a warranty?

Absolutely. The SDC 631RFXPS-1XPCXKL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

How do I get technical support or installation help for the SDC 631RFXPS-1XPCXKL?

You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us

Why buy the SDC 631RFXPS-1XPCXKL from ZenSupply?

ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

SDC 631 Series 1.5 Amp Regulated & Filtered DC Power Controller with Dual Voltage Selection

Write a Review

SDC