Access Control Systems | Commercial Door Access & Credentials

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: 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.

Q: 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.

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

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SDC

SKU: Z7252GQ6PKA

SDC Z7252GQ6PKA 7252 12/24VDC Electronic Strike Lock

Electronic strike lock for 63-door systems with 12/24VDC dual voltage
- Supports 250,000 user credentials across DESFire, MIFARE, NFC, and 125kHz
- OSDP and TCP/IP protocols for direct controller integration and event reporting
- Wired connectivity eliminates battery dependency across multi-door installations
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SDC

SKU: Z7252GQR

SDC Z7252GQR 12/24VDC GALAXY 626 Lock Strike

12/24VDC electric strike for GALAXY 626 systems, 63-door capacity
- Supports DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity credentials
- OSDP and TCP/IP communication for networked access control integration
- Wired connectivity rated for up to 250,000 user credentials per deployment
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SDC

SKU: Z7550LRCHLG

SDC Z7550LRCHLG 24VDC Electric Strike Lock

24VDC electric strike for networked access control up to 63 doors
- Supports DESFire, MIFARE, NFC, and 125kHz proximity credentials
- OSDP and TCP/IP protocols for integration with enterprise systems
- Handles 250,000 user credentials in left-hand reverse configuration
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SDC

SKU: Z7632LQE

SDC Z7632LQE 24VDC Electronic Strike Lock

24VDC electronic strike for multi-door access control systems
- Supports 250,000 credentials across 63 doors via OSDP and TCP/IP
- Compatible with DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity cards
- Left-hand configuration with 626 finish for standard door frame mounting
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SDC

SKU: Z7652LQE

SDC Z7652LQE 24VDC Electronic Strike Lock

24VDC electronic strike lock with multi-credential support for enterprise access control
- Supports DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity credentials in one device
- OSDP and TCP/IP network integration scales to 63 doors and 250,000 user records
- Left-hand satin chrome (626) finish compatible with standard access control architectures
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SDC

SKU: Z7652LQRE

SDC Z7652LQRE MLR Mortise Lock

Networked mortise lock with multi-credential support for 63-door systems
- Reads DESFire, MIFARE, NFC 13.56MHz, and 125kHz proximity cards in one lock
- Wired OSDP and TCP/IP connectivity integrates with enterprise access control
- Manages up to 250,000 users across distributed door deployments
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SDC

SKU: Z7652LRQEE

SDC Z7652LRQEE ELR ML FSECURE LHR 626 Electronic Lock Strike

Electronic strike for multi-credential access across 63 doors
- Supports DESFire, MIFARE, NFC 13.56MHz, and 125kHz proximity cards
- OSDP and TCP/IP wired connectivity for standard access control integration
- Scales to 250,000 users across enterprise multi-door deployments
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SDC

SKU: Z7652LRQRE

SDC Z7652LRQRE 24VDC Electronic Strike Lock

24VDC electronic strike for networked access control up to 63 doors
- Supports OSDP and TCP/IP protocols for integration with modern control systems
- Accepts DESFire, MIFARE, NFC, and 125kHz proximity credentials from one device
- Manages up to 250,000 users across mid-to-large multi-door installations
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SDC

SKU: Z7652RQE

SDC Z7652RQE 24VDC Electronic Strike Lock

24VDC electronic strike for multi-door access control deployments
- Supports up to 63 doors and 250,000 user credentials for enterprise facilities
- OSDP and TCP/IP wired connectivity with DESFire, MIFARE, and 125kHz prox support
- Right-hand satin chrome finish rated for new and retrofit installations
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SDC

SKU: Z7652RQRE

SDC Z7652RQRE 7600 Series Controlled Lock/Strike

Multi-door controlled lock/strike for up to 63 doors and 250K users
- Supports DESFire, MIFARE, NFC, and 125 kHz proximity credentials
- OSDP and TCP/IP communication for integration with standard platforms
- Wired connectivity for stable, centralized access control deployments
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SDC

SKU: Z7850LRQG

SDC Z7850LRQG Selectric Pro Electrified Deadbolt Strike

Electrified deadbolt strike with multi-credential support for 63-door networks
- Accepts DESFire, MIFARE, NFC, and 125kHz Prox on single strike
- Manages up to 250,000 user accounts across networked deployment
- 24VDC operation with OSDP and TCP/IP integration
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SDC

SKU: Z7850RRQRE

SDC Z7850RRQRE 7850 RR Deadbolt Strike Lock

Enterprise deadbolt strike for 63-door networked access control systems
- Supports 250,000 users with DESFire, MIFARE, NFC, and 125kHz proximity credentials
- Dual protocol (OSDP and TCP/IP) integrates with legacy and modern access platforms
- 12/24VDC wired operation for large-scale commercial and institutional deployments
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SDC

SKU: Z7852LQEE

SDC Z7852LQEE Failsecure Electronic Strike Lock

Networked failsecure deadbolt strike for 12/24VDC access control
- Supports up to 250,000 users across 63 networked doors via OSDP/TCP/IP
- Accepts DESFire, MIFARE, NFC, and 125kHz Prox credentials from most readers
- Factory-set left-hand configuration; 12/24VDC wired power supply
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SDC

SKU: Z7852LQG

SDC Z7852LQG Security Door Control Deadbolt Strike

24VDC deadbolt strike for 63-door enterprise access control
- Supports up to 250,000 user credentials across DESFire, MIFARE, NFC, and 125kHz formats
- OSDP and TCP/IP connectivity for integration with modern access control platforms
- Wired 24VDC operation suitable for large commercial and institutional deployments
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SDC

SKU: Z7852LQR

SDC Z7852LQR Deadbolt Electronic Strike

24VDC deadbolt strike with multi-credential support for networked access control
- Supports DESFire, MIFARE, NFC/13.56MHz, and 125kHz Prox credentials on one strike
- Scales to 63 doors and 250,000 user accounts via TCP/IP and OSDP protocol
- Wired integration with SDC systems and third-party OSDP-capable access panels
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SDC

SKU: Z7852LQRE

SDC Z7852LQRE 12/24VDC Deadbolt Strike Lock

12/24VDC deadbolt strike with multi-credential support for enterprise access control
- Supports DESFire, MIFARE, NFC/13.56MHz, and 125kHz proximity in one strike
- OSDP and TCP/IP protocols rated for up to 63 doors and 250,000 users
- Left-hand satin chrome deadbolt strike for high-security door frame installations
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$633.99 $606.99 Save $27.00

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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

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Showing Results for Access Control

SDC Z7252GQ6PKA 7252 12/24VDC Electronic Strike Lock

SDC Z7252GQR 12/24VDC GALAXY 626 Lock Strike

SDC Z7550LRCHLG 24VDC Electric Strike Lock

SDC Z7632LQE 24VDC Electronic Strike Lock

SDC Z7652LQE 24VDC Electronic Strike Lock

SDC Z7652LQRE MLR Mortise Lock

SDC Z7652LRQEE ELR ML FSECURE LHR 626 Electronic Lock Strike

SDC Z7652LRQRE 24VDC Electronic Strike Lock

SDC Z7652RQE 24VDC Electronic Strike Lock

SDC Z7652RQRE 7600 Series Controlled Lock/Strike

SDC Z7850LRQG Selectric Pro Electrified Deadbolt Strike

SDC Z7850RRQRE 7850 RR Deadbolt Strike Lock

SDC Z7852LQEE Failsecure Electronic Strike Lock

SDC Z7852LQG Security Door Control Deadbolt Strike

SDC Z7852LQR Deadbolt Electronic Strike

SDC Z7852LQRE 12/24VDC Deadbolt Strike Lock

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