Altronix T3SPK77F24SPDQ 24-Door Siemens SiPass Access and Power Integration Wall Mount Kit

Overview

The Altronix T3SPK77F24SPDQ is a purpose-built wall mount integration kit that unifies access control power distribution for Siemens SiPass deployments at scale. Designed around the Altronix LINQ architecture, this kit delivers 24VDC at 20A from a 115VAC input and provisions 24 individually protected door outputs — each with PTC (polymeric positive temperature coefficient) resettable overcurrent protection — so a single wiring fault or shorted lock doesn't cascade and drop adjacent doors. If you're commissioning a mid-to-large SiPass installation and need a pre-engineered, rack-ready power foundation rather than assembling components piecemeal, this kit is the logical starting point.

The T3SPK77F24SPDQ pairs with Altronix's Altronix access control power products ecosystem and targets system integrators who need deterministic, supervised power for every strike, mag-lock, and electrified hardware point in a access control system.

Key Features

• 24 Fail-Safe/Fail-Secure Outputs with PTC Protection: Each of the 24 door outputs carries its own PTC resettable overcurrent protector. When a lock or hardware fault trips a circuit, the affected output resets automatically once the fault clears — no fuse replacements, no service call for a blown fuse bank. This matters on a 24-door system where manual fuse swaps mid-shift become a real operational burden.
• 8 Managed Auxiliary Outputs: Beyond the 24 door circuits, the kit includes 8 managed auxiliary outputs for readers, REX devices, door contacts, or auxiliary hardware — reducing the need for supplemental power supply modules on complex door assemblies.
• 24VDC @ 20A Primary Supply, 12/24VDC Output Flexibility: The onboard power supply delivers 24VDC at 20A total capacity, with output voltage configurable at 12 or 24VDC per zone as your hardware mix requires. At 20A across 24 doors, you have roughly 833mA average headroom per door — sufficient for mag-locks and strikes, but budget carefully if you're running high-current electrified panic hardware on multiple outputs simultaneously.
• LINQ Network Architecture with AC5102 Support: The kit integrates one AC5102 LINQ communication module, which bridges power status, output states, and fault telemetry back to the SiPass head-end over the LINQ bus. Instead of blind power distribution, you get supervised visibility — a meaningful difference when troubleshooting a door fault across a large campus deployment.
• Up to 3 ADE5300 and 3 MHUBX8 Expansion Units: The T3SPK77F24SPDQ supports up to three ADE5300 access/power interface modules and up to three MHUBX8 managed output hubs, giving the installation room to grow beyond the base 24-door count without replacing the core power infrastructure.
• Voltage Regulators Onboard: Integrated voltage regulators stabilize output to downstream hardware regardless of input fluctuations — relevant in facilities where panel voltage sags during high-draw periods are common.
• Tamper Switches and Cam Lock Included: The enclosure ships with tamper switches and a cam lock, supporting tamper-evident installation requirements that are standard on commercial access control projects.
• Wall Mount Form Factor with Mounting Hardware Included: The kit arrives with mounting hardware, wire ties, and battery leads — the mechanical installation infrastructure is accounted for out of the box, which reduces on-site parts sourcing for the commissioning crew.

Integration and Compatibility

The T3SPK77F24SPDQ is engineered specifically for Altronix/Siemens SiPass integrated deployments. The LINQ bus ties power distribution telemetry directly into the SiPass panel architecture via the included AC5102 module, enabling centralized monitoring of power faults, output states, and enclosure tamper events from the SiPass management interface. Expansion via ADE5300 modules extends door coverage; MHUBX8 hubs add managed output density for complex door assemblies. Consult current Siemens SiPass integration documentation to confirm firmware and module revision compatibility before commissioning. For projects requiring access control power distribution outside the SiPass ecosystem, evaluate Altronix standalone LINQ panels — this kit's value proposition depends on the SiPass integration being in play.

What's in the Box

• 1x T3SPK77F24SPDQ Wall Mount Kit (enclosure with integrated power supply and LINQ architecture)
• 1x AC5102 LINQ Communication Module
• Voltage Regulators
• Cam Lock
• Tamper Switches
• Battery Leads
• Wire Ties
• Mounting Hardware

Frequently Asked Questions

Q: How many doors can the T3SPK77F24SPDQ support natively, and can it expand?

A: The T3SPK77F24SPDQ natively supports 24 doors via its 24 fail-safe/fail-secure outputs. The architecture supports expansion through up to 3 ADE5300 access/power interface modules and up to 3 MHUBX8 managed output hubs, allowing the installation to grow beyond the base 24-door footprint without replacing the core power infrastructure.

Q: What access control platform is the T3SPK77F24SPDQ designed to integrate with?

A: The T3SPK77F24SPDQ is purpose-engineered for Altronix/Siemens SiPass integrated deployments. The included AC5102 LINQ communication module bridges power status and fault data back to the SiPass head-end. It is not a general-purpose power kit intended for arbitrary access control panels.

Q: What overcurrent protection does each door output use?

A: Each of the 24 door outputs is protected by a PTC (polymeric positive temperature coefficient) resettable overcurrent protector. Unlike fuses, PTCs reset automatically after a fault clears, eliminating the need for fuse replacement during troubleshooting or after a wiring fault.

Q: What output voltage options does the T3SPK77F24SPDQ provide?

A: The kit supports 12VDC or 24VDC output, with the primary supply delivering 24VDC at 20A. This dual-voltage flexibility accommodates mixed hardware environments where some devices require 12V and others 24V.

Q: Does the T3SPK77F24SPDQ include enclosure security features?

A: Yes. The kit includes tamper switches and a cam lock, which support tamper-evident installation requirements standard on commercial access control projects.

Q: What auxiliary outputs does the T3SPK77F24SPDQ include beyond the 24 door circuits?

A: In addition to the 24 fail-safe/fail-secure door outputs, the kit provides 8 managed auxiliary outputs for powering readers, REX devices, door contacts, and other accessory hardware.

Ted Perry

The T3SPK77F24SPDQ is one of the more complete pre-packaged power solutions I've seen for a SiPass rollout at 24-door scale. The fact that it ships with the AC5102 LINQ module already accounted for matters — integrators sometimes spec the panel and forget to price the LINQ communication module separately, which creates a parts-gap at commissioning. Here, it's included, and the LINQ bus gives you real supervisory feedback on output states and enclosure tamper rather than the silent power-distribution black box you get with some competitive kits.

Technical Highlights:

• 20A @ 24VDC Supply Capacity: At 20 amps across 24 door circuits, you're working with roughly 833mA average per output — enough for most mag-locks and electric strikes, but plan your load schedule before assigning high-draw electrified panic hardware to multiple adjacent outputs simultaneously.
• PTC Resettable Overcurrent Protection: Each of the 24 outputs carries its own PTC device. On a 24-door system, an auto-resetting fault protector is the correct choice — manual fuse management at that door count during a shift creates unnecessary service exposure.
• 8 Managed Auxiliary Outputs: The additional 8 managed aux outputs handle reader and REX power without requiring a supplemental supply module on typical door assemblies, keeping the overall parts count and conduit fill tighter.

Deployment Considerations:

• This kit is SiPass-specific. Before purchasing, confirm your SiPass panel revision is compatible with the AC5102 LINQ module — Siemens has updated SiPass integration requirements across versions, and a module mismatch will require additional engineering at commissioning.
• The 115VAC input is US single-phase standard, which is fine for domestic deployments, but verify local panel capacity if you're installing in a building with constrained panel space — 20A at 24VDC draws meaningful AC current and warrants a dedicated circuit.

This kit is the right call for a SiPass-integrated mid-size commercial facility — a corporate campus, hospital wing, or government building in the 20–28 door range where you need LINQ-supervised power distribution, PTC-protected outputs, and a single pre-engineered enclosure rather than a custom-assembled solution.