Access Control Systems | Commercial Door Access & Credentials

Plan Your Deployment

Door count and expansion requirements
Reader type (card, keypad, biometric) and credential format
Fail-safe vs fail-secure hardware design
Power, cabling, and network connectivity planning
Multi-site governance and consistent standards

Sub categories

Showing Results for Access Control

Compare

Add to Cart The item has been added
SDC

SKU: 45-7RV

SDC 45-7RV Dual-Voltage Electric Strike

Networked electric strike with dual-voltage operation for retrofit and new builds
- Selectable 12VDC or 24VDC operation reduces inventory and simplifies field wiring
- TCP/IP connectivity integrates directly into IP access control platforms without relay modules
- HID credential system compatible; fits standard 1¾" to 2⅛" door frames
In stock · Ships same business day

$209.00 $119.99 Save $89.01

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 45-A

SDC 45-A Electric Strike 24VDC Access Control

24VDC electric strike for HID access control with fail-safe/secure modes
- 24VDC operation integrates directly with HID readers and existing panel power
- Selectable fail-safe or fail-secure locking to match building code and security needs
- Installs in retrofit and new construction door frames without special modifications
In stock · Ships same business day

$159.99

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 453PV

SDC 453PV Push Switch Pneumatic Controller

Pneumatic controller with NFC/13.56MHz for proximity and keypad readers
- 30VDC wired operation with OSDP protocol for access control integration
- NFC/13.56MHz credential support compatible with proximity and keypad readers
- Pneumatic strike actuation for door control in integrated security systems
Special Order · Ships in 2-3 weeks

$337.99 $304.99 Save $33.00

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 45F-4SU

SDC 45F-4SU Electric Strike 4-Door 12/24VDC

4-door electric strike with OSDP/TCP/IP for networked access control
- Controls up to 4 doors from one unit on 12/24VDC dual voltage
- OSDP and TCP/IP connectivity integrates with HID-compatible readers
- Supports 250,000 user records for mid-to-large facility deployments
Special Order · Ships in 2-3 weeks

$299.99 $269.99 Save $30.00

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 463NU

SDC 463NU Integrated 1-30 Sec Timer Lock/Strike

Integrated lock/strike with proximity & keypad, 1-30 sec timer, OSDP native
- Dual authentication—NFC/13.56MHz proximity + keypad entry in single unit
- Adjustable 1-30 second timed release for controlled access workflows
- OSDP protocol over wired 30VDC for direct integration without gateways
Special Order · Ships in 2-3 weeks

$104.99 $94.99 Save $10.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 463U

SDC 463U Vandal-Resistant I/O Switch for Access Control

Wired vandal-resistant I/O switch with OSDP for NFC and keypad access
- OSDP protocol with encrypted credential transmission for vendor-neutral integration
- 30VDC powers door strikes and electric latches without separate control relay
- NFC/13.56MHz proximity and keypad credential support in single outdoor unit
In stock · Ships same business day

$108.99 $99.99 Save $9.00

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 474MU

SDC 474MU Touchless Sense Switch Exit Controller

Network controller for up to 10 doors with touchless exit and multi-credential support
- Manages 250,000 user profiles across proximity, NFC, and MIFARE credentials
- Touchless sense switch exit for hands-free operation in high-traffic areas
- OSDP protocol integration with 24VDC wired connectivity for enterprise deployments
Special Order · Ships in 2-3 weeks

$159.99 $152.99 Save $7.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 474U

SDC 474U Touchless Exit Switch Controller

Wired touchless controller with NFC, proximity, and keypad for OSDP systems
- 24VDC wired operation—no batteries, direct panel power integration
- OSDP protocol compatible with Salto, Genetec, Kantech, Lenel, Vanderbilt
- Multi-credential support: NFC/13.56 MHz, proximity cards, keypad PIN entry
In stock · Ships same business day

$220.99

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 482A4RU

SDC 482A4RU Round Handicap Push Switch Controller

Multi-credential controller for up to 63 doors, 250K users
- Supports DESFire, MIFARE, NFC, and 125kHz proximity cards
- OSDP and TCP/IP communication for standards-based integration
- 28VDC round handicap push switch reader with wired connectivity
Special Order · Ships in 2-3 weeks

$73.99

Add to Cart
The item has been added
Compare

Out of stock
SDC

SKU: 482R-KIT

SDC 482R-KIT ADA SPDT Blue 4.5 Round 630 Door Controller

4-door controller with OSDP/TCP/IP for HID-based access systems
- Manages up to 250,000 users across 4 doors with 28VDC operation
- OSDP and TCP/IP protocols integrate with enterprise access platforms
- ADA-compliant 4.5" blue enclosure fits retrofit and new installations
Special Order · Ships in 2-3 weeks

$489.99 $441.99 Save $48.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 482S-KIT

SDC 482S-KIT 4-Door Access Control Controller

4-door controller with 250K credentials and native OSDP + TCP/IP
- Manages 4 independent door lines in single 28VDC unit for multi-door sites
- 250,000 user credential capacity handles enterprise deployments without sprawl
- OSDP native support integrates directly with HID readers, no converters needed
In stock · Ships same business day

$489.99 $426.99 Save $63.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 491

SDC 491 Blue Break Glass Emergency Door Controller

10-door controller with blue break-glass emergency override and dual OSDP/TCP/IP
- Manages up to 10 doors on single 30VDC supply with redundant network and hardwired egress
- OSDP + TCP/IP connectivity eliminates dedicated serial runs and locks in vendor-neutral readers
- Multi-tech credential support: DESFire, MIFARE, NFC 13.56MHz, and 125kHz proximity cards
In stock · Ships same business day

$145.99 $139.99 Save $6.00

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 491-BB

SDC 491-BB Surface Mount Access Control Enclosure

4-door wired access controller with 250K credential capacity
- Manages up to 4 doors simultaneously with HID card, fob, or PIN readers
- Stores 250,000 user records locally for mid-scale commercial deployments
- OSDP and TCP/IP connectivity for networked, real-time access verification
In stock · Ships same business day

$50.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 491GL4

SDC 491GL4 Replacement Glass Plates

Replacement glass plates for SDC 491GL4 10-door access controllers
- Compatible with DESFire, MIFARE, NFC 13.56MHz, and 125kHz proximity readers
- Supports up to 250,000 user records across multi-door deployments
- 30VDC operation integrates with existing OSDP access control networks
In stock · Ships same business day

$24.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 492-BB

SDC 492-BB Surface Mount Back-Box Access Control Controller

4-door surface-mount controller with 250K user capacity and OSDP/TCP/IP
- Manages up to 4 independent doors per unit with 250,000 user profiles stored locally
- OSDP and TCP/IP protocols for networked readers and enterprise VMS integration
- HID credential format support for proximity cards, smart cards, and mobile credentials
In stock · Ships same business day

$34.99

Add to Cart
The item has been added
Compare

Add to Cart The item has been added
SDC

SKU: 55-BU

SDC 55-BU Mortise Lockset and Electric Strike

Mortise lockset with 24VDC electric strike, OSDP/TCP/IP wired control
- Manages up to 250,000 HID credentials per controller with real-time networked verification
- Single controller operates 4 doors, ideal for floor-level or small building deployments
- OSDP and TCP/IP protocols integrate directly into existing LAN infrastructure
In stock · Ships same business day

$540.00 $405.99 Save $134.01

Add to Cart
The item has been added

What to Look For When Buying

The six decisions that matter most before you spec.

Fail-Safe vs Fail-Secure

Fail-safe locks (power-to-lock) unlock on power loss — required for egress routes by most fire codes. Fail-secure (power-to-unlock) stays locked on power loss — used on office and storage doors where security trumps egress. Life-safety code interpretation varies by jurisdiction; consult your AHJ before specifying. See our fail-safe vs fail-secure guide.

OSDP vs Wiegand

Wiegand is the legacy reader-to-controller protocol (unencrypted, one-way, limited to 26-bit formats). OSDP (Open Supervised Device Protocol) is the modern replacement — bidirectional, encrypted, supervised, and future-proof for Seos/mobile credentials. New deployments should be OSDP; plan a Wiegand-to-OSDP migration path in legacy systems before adding mobile credential support.

Credential Technology

125 kHz proximity (HID Prox, EM) is the legacy standard — cheap, cloneable, no security. 13.56 MHz smart cards (iCLASS SE, MIFARE DESFire EV3, Seos) use AES encryption and are the commercial standard. Mobile credentials via NFC/BLE increasingly replace physical cards — but only on OSDP-capable readers. Specify multi-technology readers for migration flexibility.

Cloud vs On-Prem Management

Traditional server-based access platforms (Lenel, Genetec, C-Cure) require IT infrastructure and maintenance contracts. Cloud-native platforms (Brivo, Openpath/Avigilon Alta, Genea) eliminate servers but add per-door monthly fees. Mid-size deployments increasingly choose cloud; enterprise + critical infrastructure still favor on-prem. Hardware choice determines which platforms you can run.

Power Supply Sizing

Every lock + reader + controller has an inrush current and a holding current — and they differ. Maglocks hold at 300-500 mA but pull 800 mA on release. UL 294 power supplies rated for total simultaneous holding + 25% headroom, with battery backup sized to code-required runtime. Undersized power supplies are the #1 cause of access-control nuisance failures.

Code Compliance (Egress)

IBC, NFPA 101, and ADA all mandate unimpeded egress. A magnetically-locked door requires a fire-alarm tie-in, a bond-sensor, and a request-to-exit device — omit any and the door is a code violation. Delayed-egress maglocks require 15-second delay + sounder per NFPA. Always confirm lock spec with the AHJ before ordering.

Technology Stack

The specs and acronyms that actually affect outdoor performance.

OSDP v2 + Secure Channel

Open Supervised Device Protocol v2 with Secure Channel Protocol (SCP) delivers AES-128 encryption between reader and controller over RS-485. Replaces unencrypted Wiegand. Required for new federal deployments and FIPS 140-2 applications. All modern HID, ASSA ABLOY, and STid readers support OSDP + SCP.

Seos + iCLASS SE Credentials

HID Seos is the current-generation credential platform: AES-128 encrypted, multi-application, supports mobile wallets, backward-compatible with iCLASS SE. Seos credentials work on Seos readers + older iCLASS SE readers — iCLASS SE credentials do not work on legacy iCLASS (non-SE) readers. Plan migrations carefully.

FIPS 201 / PIV + PIV-I

Federal Identity Verification standard — the credential format used for federal employee and contractor badges. PIV-I (Interoperable) is the commercial variant for hospitals, utilities, and critical-infrastructure contractors. Specify PIV/PIV-I-capable readers (HID pivCLASS, multiCLASS SE) for any facility that hosts government visitors.

UL 294 Listing

Underwriters Laboratories listing for access control system units — power supplies, controllers, and locks. UL 294 6th edition covers security, durability, and overcurrent/overvoltage protection. Insurance and code requirements increasingly specify UL 294 listing. Altronix access-control power supplies are UL 294 listed across the catalog.

Wiegand Protocol

Legacy reader-to-controller protocol — one-way, unencrypted, variable bit-length format. Easily cloned with <$50 hardware. Still widespread because of low cost and universal compatibility. Acceptable for low-security interior doors; should be replaced with OSDP on any external or sensitive-area door.

Request-to-Exit (REX)

Motion- or push-button-activated device that signals the access controller to unlock the door from the secure side without generating an alarm. Required for maglock-equipped egress doors per code. PIR REX sensors must be properly aimed — nuisance alarms and held-door violations trace back to bad REX placement more than any other cause.

Typical Deployment Scenarios

Multi-Tenant Office Building

Lobby turnstiles with multi-tech readers, tenant suite doors with HID Signo + Seos, parking garage with long-range readers, elevator control for floor-by-floor access. Cloud platform (Brivo, Openpath) with mobile credentials replaces physical card issuance. Integration with SIP video intercoms for visitor management.

K-12 School Secure Vestibule

Front entry vestibule with fail-secure electric strike, interior Aiphone video intercom for visitor buzz-in, badge readers for staff, lockdown button integrated with mass notification. Back-of-house doors fail-safe per code. Full VMS integration for event overlay.

Hospital & Healthcare

Unit doors with HID multiCLASS SE + PIV-I compatibility, medication rooms with dual-authentication (card + biometric), ER ambulance bays with ruggedized readers, delayed-egress on behavioral health wards. Lenel or Genetec server-based platform with HIPAA-compliant audit logging. High-cycle-count electric strikes required.

Data Center & Critical Infrastructure

Biometric readers at server-room entries, mantrap doors with anti-tailgating sensors, cage-level access with OSDP + SCP, 7x24 audit logging. FIPS 201 / PIV-I credentials. Integration with IP cameras for tailgating review and infrastructure monitoring for physical-layer security.

Frequently Asked Questions

What's the difference between fail-safe and fail-secure locks?

Fail-safe locks (also called "power-to-lock") unlock on power loss — required for egress routes by most fire and life-safety codes. Fail-secure locks ("power-to-unlock") stay locked on power loss — typically used on office, storage, and supply doors where security trumps egress. Always confirm lock selection with the local AHJ; see our fail-safe vs fail-secure guide.

Is OSDP required for new access control installations?

Not legally required in most jurisdictions — but strongly recommended and effectively mandatory for federal deployments. OSDP with Secure Channel provides AES-128 encryption between reader and controller, bidirectional supervision, and future-proof support for mobile credentials. Legacy Wiegand is unencrypted and easily cloned. New deployments should be OSDP-capable from day one; legacy systems should plan a migration path.

Are HID card readers NDAA compliant?

Yes. HID Global is headquartered in Austin, TX, manufactures in multiple allied countries, and is fully NDAA Section 889 compliant. HID Signo, multiCLASS SE, iCLASS SE, and pivCLASS reader families are all eligible for federal, state government, and critical-infrastructure procurement. Credential cards are manufactured to the same compliance standard.

How do I size an access control power supply?

Add up holding current for all locks + reader standby current + controller standby current, then add 25% headroom for inrush and aging. Battery backup should provide code-required standby runtime (typically 4 hours for fire-alarm tie-ins; 15 min for access-only). Altronix UL 294 power supplies post clear spec sheets for total and per-output current — match to your actual load, don't guess.

Can mobile credentials replace physical access cards?

In most modern deployments, yes — but the reader has to support it. Readers need NFC and/or BLE (Bluetooth Low Energy) plus a partnership with the mobile credential platform (HID Mobile Access, Openpath, Kastle, etc.). Older proximity-only readers cannot read mobile credentials. Mobile adoption is usually mixed with physical cards during a multi-year transition — plan for both.

What's the difference between iCLASS SE and Seos credentials?

iCLASS SE was HID's previous-generation secure credential (AES-128, 2013-era). Seos is the current generation (2016+) — same AES-128 security, but multi-application, mobile-wallet capable, and future-proof. Seos credentials work on Seos-capable readers and on older iCLASS SE readers. iCLASS SE credentials do not work on legacy (pre-SE) iCLASS readers. See our HID Global catalog for current Seos SKUs.

Access Control

Plan Your Deployment

Sub categories

Showing Results for Access Control

SDC 45-7RV Dual-Voltage Electric Strike

SDC 45-A Electric Strike 24VDC Access Control

SDC 453PV Push Switch Pneumatic Controller

SDC 45F-4SU Electric Strike 4-Door 12/24VDC

SDC 463NU Integrated 1-30 Sec Timer Lock/Strike

SDC 463U Vandal-Resistant I/O Switch for Access Control

SDC 474MU Touchless Sense Switch Exit Controller

SDC 474U Touchless Exit Switch Controller

SDC 482A4RU Round Handicap Push Switch Controller

SDC 482R-KIT ADA SPDT Blue 4.5 Round 630 Door Controller

SDC 482S-KIT 4-Door Access Control Controller

SDC 491 Blue Break Glass Emergency Door Controller

SDC 491-BB Surface Mount Access Control Enclosure

SDC 491GL4 Replacement Glass Plates

SDC 492-BB Surface Mount Back-Box Access Control Controller

SDC 55-BU Mortise Lockset and Electric Strike

Browse by Product Family

What to Look For When Buying

Technology Stack

Typical Deployment Scenarios

Top Brands for Outdoor Deployments

Frequently Asked Questions

Related Categories

Engineering Reading