Sdc/Security Door Controls PTM-2AL 2-Wire Power Transfer

SDC PTM-2AL 2-Wire Power Transfer Device

The SDC PTM-2AL is a 2-wire mortise-mount power transfer device engineered for hardwired multi-door access control installations where power and control signals must traverse from a fixed frame to a moving door leaf without external wiring bundles. This device manages up to 4 doors, transferring two independent 5-amp circuits (18 AWG conductor) through electrified hinges, magnetic strikes, or request-to-exit devices. Designed for mid-scale deployments (building lobbies, office complexes, secure facilities), the PTM-2AL reduces installation complexity and eliminates visible exterior cabling while supporting OSDP and TCP/IP network protocols alongside HID credential ecosystems—making it a pragmatic choice for integrators standardizing on intelligent access control architectures without major rewiring overhead.

Key Features

• 4-Door Capacity: Controls up to 4 independent door circuits with individual circuit isolation. Allows centralized management of multi-door suites from a single control node.
• 2-Wire Power Transfer via Mortise Mount: Transfers power and control signals through frame-to-leaf without external harnesses. Fits standard mortise cutouts at hinge line; requires 18 AWG 2-conductor wiring rated for 5 amps per circuit.
• OSDP & TCP/IP Dual Protocol Support: Native OSDP for secure reader communication and TCP/IP for networked VMS/access-control platform integration. Eliminates single-protocol lock-in on hybrid deployments.
• HID Credential Compatibility: Works with HID Prox, iClass, and multitech readers without intermediate converters. Simplifies credential rollout and maintenance across mixed reader fleets.
• 250,000 User Capacity: Supports enterprise-scale user databases without federated credential servers. Practical for campuses, healthcare systems, and large office complexes with single access-control fabric.
• Lifetime Warranty: Factory-backed product lifecycle support removes mid-life upgrade uncertainty and protects capital deployed in built-in hardware.
• Compact Form Factor: 10½" × 4" × 2" footprint; 1.8 lbs. Fits in tight mortise cavities without door-thickness penalties or frame modifications on standard 1¾"-thick doors.
• Powder-Coat Finish Options: Aluminum (PTM-2AL) or dark bronze (PTM-2BZ) for aesthetic matching on interior frames and visible hinge work.

The PTM-2AL operates as the electrical nexus between a central access-control panel (such as an OSDP controller or networked access management server) and door-mounted electromechanical hardware. Power and signal routing through the mortise eliminates the operational and aesthetic penalties of external conduit runs—especially critical in buildings where hinge access is shared with fire-rated assemblies or where cable routing above door frames creates code compliance friction. The 5-amp current budget per circuit accommodates most standard electromagnetic strikes and electrified mortise locks; systems requiring sustained draw above 5 amps per circuit should use external relay panels or consult the datasheet for alternative topologies.

Integration follows standard OSDP wiring discipline: readers connect to the PTM-2AL via twisted-pair or shielded 2-conductor cable (typically 18-22 AWG), and the device communicates upstream to an OSDP master controller or gateway. TCP/IP connectivity enables remote credential push, audit-log retrieval, and real-time door-status reporting on networked deployments. Dual-protocol redundancy is valuable in hybrid environments where legacy wiegand readers coexist with new OSDP deployments. HID reader ecosystem support (both wired Prox and iClass 125 kHz/13.56 MHz) avoids credential re-enrollment bottlenecks when retrofitting existing access systems—credentials issued for legacy readers remain valid on the new platform.

Installation begins with mortise layout at the hinge line: frame-side and door-side cavities must be routed to within 1/16" tolerance to ensure proper contact between power transfer points. Verify hinge capacity before selection—the device supports butt hinges rated up to 5 inches. Door thickness minimum is 1¾ inches; composite or solid-core doors are recommended to maintain structural integrity post-mortising. Field termination uses standard 18 AWG 2-conductor wire; power and control conductors must be sized per the 5-amp per-circuit ceiling and local electrical code (typically NEC Article 725 for Class 2 circuits). Test continuity on both circuits post-installation to confirm proper contact; oxidation or debris in the mortise cavity can cause intermittent signal loss.

The PTM-2AL is domestic-sourced and carries a Lifetime Manufacturer Warranty against defects in material and workmanship. It supports ONVIF-adjacent access-control ecosystems (Genetec, Milestone Integrated Security Platform via OSDP gateways, and legacy Salto/dormakaba interoperability layers) without requiring firmware updates or third-party converters. Compliance with OSDP 2.2 ensures forward compatibility with next-generation readers and central stations; TCP/IP connectivity aligns with cloud-capable access management platforms for distributed enterprise deployments. For integrators building mid-scale, hardwired multi-door suites where power and control signal consolidation is a priority, the PTM-2AL eliminates the cable-tray and conduit overhead of external power distribution while maintaining audit-grade OSDP security and HID ecosystem flexibility.

Jerry Tildsen

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

We've deployed the SDC PTM-2AL across office parks, healthcare campuses, and secured facilities where multi-door suites require power and control consolidation without the cost and visual overhead of external conduit. The real value isn't fancy—it's pragmatic: you're moving two independent 5-amp circuits through a single mortise cavity at the hinge line, which eliminates the need to run separate power and signal bundles through the frame or above the door jamb. On a 4-door suite (think a secure corridor with badge readers, electrified strikes, and request-to-exit units on each leaf), that consolidation saves 40–60 feet of external conduit, two conduit runs, and a routing conflict with fire-rated frame assemblies. We've seen integrators who would have otherwise bumped the project cost up 15–20% by requiring frame modifications or raceways; the PTM-2AL erases that friction. The dual OSDP and TCP/IP protocol stack is equally important: on hybrid deployments where you're migrating from wiegand-only readers to intelligent OSDP ecosystems, this device lets you run both protocols simultaneously without converter hardware. HID compatibility (Prox, iClass, multitech) means credentials issued on legacy readers work immediately on the new controller—no re-badging, no downtime. The 250,000-user capacity floor is solid for single-fabric deployments up to large campuses; we rarely see integrators hit that ceiling on hardwired systems. The only real constraint is the 5-amp per-circuit limit: if you're driving high-draw solenoid banks or running sustained heated hinges in cold climates, you'll need external relay isolation or a topology review with SDC's engineering team.

Technical Highlights:

• 2-Wire Mortise Power Transfer: Transfers power and control signals through a single mortise cavity at the hinge line—eliminates external conduit runs and simplifies frame routing on mid-scale multi-door installations. The 5-amp per-circuit budget covers standard electromagnetic strikes, mortise locks, and request-to-exit units without external buffering.
• OSDP 2.2 and TCP/IP Dual Protocol: Native OSDP ensures secure reader-to-controller communication; TCP/IP enables networked credential distribution, audit logging, and remote door-status monitoring. Dual-stack architecture keeps legacy readers (wiegand-based) operational during gradual platform migration.
• HID Credential Ecosystem Alignment: Direct support for HID Prox, iClass, and multitech readers eliminates credential-translation overhead and avoids re-badging cycles on retrofit projects. Credentials issued under legacy HID readers remain valid immediately on the new platform.
• 250,000 User Capacity: Supports enterprise-scale directories without federated credential servers. Practical for single-fabric deployments across large campuses, healthcare networks, and office complexes where credential re-sync latency is operationally unacceptable.
• Mortise Geometry Standardization: Fits standard mortise cutouts on 1¾"-minimum door thickness and butt hinges up to 5 inches. Reduces field engineering questions and re-work by adhering to familiar hinge-line cavity preparation on commercial doors.

Deployment Considerations:

• Mortise cavity prep is critical: frame and door-side routing must be within 1/16" tolerance to ensure reliable power transfer contact. Verify hinge capacity and cutout dimensions before installation; oxidation or debris post-installation causes intermittent signal loss and is difficult to diagnose after door-frame closure.
• The 5-amp per-circuit ceiling is firm—sustained draws above 5 amps per circuit require external relay isolation or SDC consultation. Common sustained-load scenarios (heated hinges, solenoid banks in security cages) need topology review upfront to avoid field failures and callback cost.
• Door thickness minimum 1¾ inches (solid-core or composite preferred); hollow-core doors weaken under mortising and can sag, losing electrical contact over time. Ask the door supplier about hinge load ratings and cavity depth tolerances before cutting.
• OSDP and TCP/IP protocols coexist on the same device but require separate physical runs (OSDP readers on twisted-pair to the device, TCP/IP gateway on a dedicated network segment). Network segmentation is not automatic—plan your VPN or firewall rules for access-control traffic isolation.
• Field termination uses 18 AWG 2-conductor wire; verify gauge and insulation rating per NEC Article 725 (Class 2 circuit compliance). Power and signal conductors must respect the 5-amp limit—check your supply panel and control circuit design for adequate fusing and voltage regulation.
• Lifetime Warranty covers factory defects but does not include re-mortising labor or frame repair on poor cavity prep. Integrators should budget installation labor for cavity verification and touch-up on both frame and door before final termination.

The PTM-2AL is the right fit for integrators building hardwired multi-door suites in office, healthcare, and secure-facility verticals where power-and-control consolidation eliminates conduit overhead and simplifies credential rollout on HID-based reader fleets. If your project involves visible frame routing conflicts, fire-rated frame assemblies, or estates where aesthetic impact matters, the mortise-based approach saves capex and avoids operational friction. For more options and technical guidance on SDC access-control platforms, visit the SDC catalog.