Altronix T3SPK77F24SPQ 24-Door Altronix/Siemens SiPass Access Control Power Integration Wall Mount Kit
The T3SPK77F24SPQ is a purpose-built wall-mount integration kit that bridges Altronix power distribution with Siemens SiPass access control — delivering 24VDC at 20A across 24 fail-safe/fail-secure door outputs plus 8 managed auxiliary outputs from a single, fused enclosure. If you're deploying SiPass in a mid-to-large commercial or institutional building and need power and access control to coexist in a clean, auditable architecture, this is the kit designed for exactly that. For background on the full Altronix access control power line, including companion products and enclosures, the brand catalog covers the range well.
Overview
Large-scale access control deployments routinely hit a friction point where the access controller vendor and the power distribution vendor each assume the other has solved integration. The T3SPK77F24SPQ eliminates that friction for Siemens SiPass environments: it supports one AC5102 controller, up to three ADE5300 door controllers, and up to three MHUBX8 hubs — pre-engineered to match the hardware topology SiPass integrators actually deploy at the 24-door tier. Instead of sourcing power supplies, enclosures, and wiring separately, this kit ships as a validated assembly ready for wall-mount installation.
Key Features
- 24 Fail-Safe/Fail-Secure Door Outputs: Every output is individually configurable for fail-safe or fail-secure operation, which matters when fire code and security policy point in opposite directions on the same floor. You can assign egress paths as fail-safe (door unlocks on power loss) and high-security doors as fail-secure (door stays locked) without splitting into separate power supplies.
- 24VDC @ 20A Power Rating: At 20A of continuous output capacity on a 24VDC bus, this kit handles the current draw of a fully loaded 24-door system without throttling. That headroom also means you're not running the supply at its ceiling — a real factor for 24/7 commercial buildings where thermal stress on undersized supplies shortens service life.
- 8 Managed Auxiliary Outputs: The eight managed aux outputs give you supervised control over ancillary devices — REX sensors, request-to-exit loops, supplemental locks, or alarm shunts — without pulling a separate power distribution panel. Managed outputs let the system report status back to SiPass rather than operating blind.
- Fused Protection: Individual fuse protection per output means a short or overload on one door circuit doesn't cascade to adjacent doors. In a 24-door system, that's the difference between a single nuisance trip and a floor-wide lockout during an audit or emergency response.
- 115V Input Voltage: Standard North American mains input simplifies installation — no step-down transformer, no special circuit requirements beyond a dedicated 20A breaker appropriate for the load.
- 12/24VDC Output Flexibility: The dual-voltage output (12 or 24VDC) means this kit can power a mixed hardware environment if your door hardware or readers operate at 12V rather than 24V — useful when door hardware standardization hasn't kept pace with controller upgrades.
- Wall-Mount Form Factor: The wall-mount enclosure keeps the power/control hardware co-located in an IDF or security closet rather than requiring a dedicated rack space. For buildings without raised-floor infrastructure, wall-mount simplifies the as-built drawing and the inspection walkthrough.
- Validated Siemens SiPass Device Support: The kit is sized and configured for 1× AC5102, up to 3× ADE5300, and up to 3× MHUBX8 — the specific controller, door controller, and hub lineup that SiPass integrators use at the 24-door scale. Pre-validated device support reduces commissioning risk on large projects where field-substituting power infrastructure mid-install is expensive.
Integration & Compatibility
The T3SPK77F24SPQ is engineered specifically for access control power in Altronix/Siemens SiPass environments. Confirmed compatible devices include the Siemens AC5102 access controller (1 unit), ADE5300 door controllers (up to 3 units), and MHUBX8 managed hubs (up to 3 units). This combination covers the standard architecture for 24-door SiPass installations. Outside of this validated device list, compatibility with other SiPass hardware or third-party access control systems is not confirmed by the available evidence — integrators adding non-listed hardware should verify power draw and output compatibility against the Altronix documentation before committing to the bill of materials. If your project requires a broader device mix or a higher door count, review the Altronix LINQ and SiPass integration family for alternative configurations before finalizing the design.
Frequently Asked Questions
Q: How many doors does the T3SPK77F24SPQ support?
A: The T3SPK77F24SPQ supports up to 24 doors via its 24 fail-safe/fail-secure outputs. It is designed to work with one AC5102, up to three ADE5300 door controllers, and up to three MHUBX8 hubs in a Siemens SiPass architecture.
Q: What is the output voltage and current capacity?
A: The kit outputs 24VDC at 20A continuous. It also supports 12VDC output for mixed door hardware environments. Input is standard 115V AC mains.
Q: Can the fail-safe and fail-secure outputs be configured independently per door?
A: Yes. Each of the 24 door outputs is individually configurable for either fail-safe or fail-secure operation, allowing you to assign egress paths and high-security doors differently within the same system.
Q: What are the 8 managed auxiliary outputs used for?
A: The 8 managed auxiliary outputs support ancillary devices such as REX sensors, request-to-exit loops, supplemental locks, or alarm shunts. Managed outputs provide supervised status reporting back to the SiPass system rather than operating without feedback.
Q: What type of protection does the T3SPK77F24SPQ include?
A: The kit includes fuse protection. Individual fusing per output circuit prevents a single door circuit fault from affecting adjacent outputs — an important consideration for maintaining door access across an entire floor during a fault event.
Q: Is the T3SPK77F24SPQ compatible with Siemens SiPass controllers other than the AC5102?
A: Based on available evidence, the T3SPK77F24SPQ is validated for use with the Siemens AC5102 (1 unit), ADE5300 (up to 3 units), and MHUBX8 (up to 3 units). Compatibility with other SiPass controllers not listed should be verified against Altronix documentation prior to ordering.
The T3SPK77F24SPQ addresses one of the more persistent headaches in large commercial access control: getting Altronix power distribution and Siemens SiPass to operate as a unified, auditable system rather than two separate products that happen to share a closet. The 24VDC @ 20A output capacity is the spec I'd zero in on first — at 20A you have real headroom for a fully loaded 24-door configuration without running the supply anywhere near its thermal limits on a site that's staffed around the clock.
Technical Highlights:
- 24 Individually Configurable Door Outputs: Fail-safe and fail-secure are set per output, not per enclosure — critical when a single floor has both fire-egress-compliant doors (must unlock on power loss) and secured server room doors (must stay locked).
- 8 Managed Auxiliary Outputs: Supervised aux outputs feed status back to SiPass rather than operating in a feedback void — you'll see REX sensor and supplemental lock status in the SiPass event log, which simplifies incident review.
- Fuse Protection Per Circuit: Individual fusing means a wiring fault at door 14 doesn't interrupt doors 1–13 or 15–24. On a 24-door system, that containment is what keeps a maintenance event from becoming a security incident.
Deployment Considerations:
- Device support is validated for a specific SiPass topology: 1× AC5102, up to 3× ADE5300, up to 3× MHUBX8. Confirm your hardware bill of materials matches this list before ordering — substituting unlisted SiPass hardware introduces unvalidated power assumptions.
- The 115V input requires a dedicated circuit sized for the 20A load. Sharing this circuit with other closet equipment is a common field mistake that causes nuisance trips under full door load — plan the panel schedule accordingly.
This kit is the right specification for a 24-door Siemens SiPass rollout in a mid-rise commercial office, hospital wing, or campus building where the integrator needs Altronix power and SiPass control to commission as a single, inspectable system rather than two independently sourced assemblies bolted together after the fact.
