Altronix ACMS8CB 8-Output PoE Access Power Controller
The Altronix ACMS8CB is a board-form voltage regulator that accepts PoE input and distributes regulated, supervised power across eight independent outputs. Built for multi-door access control installations where you need to consolidate power delivery to card readers, electronic locks, and other access devices from a single PoE source without daisy-chaining power supplies across the facility.
Key Features
- 8 Independent Power Outputs: Splits a single PoE connection into eight supervised channels — eliminates the need to run separate power to each access device, reducing cable runs and installation complexity in buildings with multiple controlled doors.
- Regulated Voltage Output: Built-in voltage regulation ensures stable, consistent power to connected access control devices, preventing brownout issues that can cause lock failures or reader timeouts during peak load.
- PTC-Protected Outputs: Polyswitch overcurrent protection on each channel resets automatically after a short circuit clears — no blown fuses to replace, and no accidental power loss to adjacent outputs if one device faults.
- Output Supervision Monitoring: The ACMS8CB monitors each of the eight channels for faults and reports status back to your access control system — you'll know immediately if a lock loses power, not hours later when occupants report a door won't open.
- Fire Alarm Disconnect Capability: Integrates a fire alarm disconnect function for code compliance in monitored facilities where access control must fail to a safe state during fire events — mandatory in many jurisdictions for egress control.
- Dual Input Design: Supports redundancy and load distribution when paired with multiple PoE sources, reducing single-point-of-failure risk in critical access infrastructure.
- Board-Form Factor: Designed for integration into larger power distribution frames or enclosures, giving you flexibility to combine this controller with other power management equipment in a single cabinet.
Integration & Compatibility
The ACMS8CB integrates into any PoE-enabled network infrastructure supporting power delivery to access control devices. It accepts standard 802.3af PoE input and is suited for deployment in commercial buildings, campuses, or industrial facilities running distributed access control systems. The board-form design and supervision outputs are compatible with Altronix access control platforms and third-party systems that support supervised power monitoring. Consult your access control software documentation to confirm support for external power supervision inputs.
When to Choose a Different Model
If you need more than eight outputs, consider a higher-channel variant within the Altronix power infrastructure line. If your access control devices require non-standard voltage or current beyond what PoE can safely deliver, you may need a dedicated 12VDC or 24VDC power supply paired with a separate distribution board instead of relying on PoE-based regulation.
Frequently Asked Questions
Q: Does the ACMS8CB require a separate UPS or backup power system?
A: The ACMS8CB itself does not include built-in battery backup. If you need uninterruptible power for access control during outages, install a PoE UPS upstream of the ACMS8CB input, or integrate the controller into a larger 12VDC/24VDC backup system with a dedicated charger.
Q: Can I daisy-chain multiple ACMS8CB boards for more outputs?
A: The board-form design allows multiple controllers to be integrated into the same cabinet or frame, but each requires its own PoE input for proper load distribution and supervision. Do not share a single PoE source across multiple boards without consulting the system design guide.
Q: What's the maximum current per output?
A: Refer to the datasheet for exact per-channel current limits. PTC protection activates if a short circuit draws excessive current, so verify that all connected access devices fall within the rated amperage for your installation.
Q: Does the fire alarm disconnect require a separate hardwired input?
A: Yes. The fire alarm disconnect function is typically triggered by a monitored alarm circuit. Integration details are in the technical documentation; coordinate with your fire alarm contractor and access control installer during commissioning.
Q: Is the ACMS8CB suitable for outdoor installations?
A: The board-form factor requires integration into an enclosure or cabinet. Ensure the enclosure itself is rated for your environmental conditions (IP rating, temperature range). The ACMS8CB is not standalone for outdoor mounting.
Q: What warranty does the ACMS8CB include?
A: The ACMS8CB is covered under Altronix's Lifetime Limited Warranty, protecting against defects in materials and workmanship for the life of the product.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix ACMS8CB solves a real pain point in multi-door access control design: how to deliver supervised power to a dozen locks and readers without running separate power cables to each one. The board-form voltage regulator accepts PoE input and conditions power across eight channels, each with its own fault monitoring. If you're planning a mid-to-large access control deployment across multiple floors or buildings, this controller eliminates cable sprawl and gives you visibility into power faults in real time.
Technical Highlights:
- Eight Supervised Outputs: Each channel monitors power delivery and reports status back to your access control panel — a lock that loses power triggers an alarm immediately, not when a tenant calls to complain the door won't unlock.
- PTC Overcurrent Protection: Short circuits on one output don't kill the other seven. Polyswitch protection resets automatically when the fault clears, so you don't have to replace fuses or manually restart channels after an overcurrent event.
- Regulated Voltage from PoE Input: Accepts standard 802.3af PoE and conditions it to stable, consistent levels across all eight outputs — critical because access control devices are intolerant of voltage sag, which causes intermittent lock failures and reader timeouts.
- Fire Alarm Disconnect: Integrates a monitored alarm disconnect function required by code in many jurisdictions. During a fire event, this can force all controlled access points to fail safe (unlock for egress or lock for containment, depending on your system design).
Deployment Considerations:
- The ACMS8CB is a bare board — it must be integrated into an enclosure or cabinet. Factor in integration cost and space in your power distribution frame before specifying.
- Each of the eight outputs draws from a single PoE input. If your total access control load exceeds the safe amperage for 802.3af (typically ~13W), you'll need to split loads across multiple ACMS8CB boards with separate PoE injectors or switches, adding complexity and cost.
- Output supervision requires integration with your access control software. Verify that your VMS or panel supports external power monitoring inputs before installation; if it doesn't, you lose fault visibility on the eight channels.
- Fire alarm disconnect functionality must be coordinated during design and testing. The signal path from your alarm panel to the ACMS8CB disconnect input is critical and often overlooked in commissioning — schedule this early with both teams.
Deploy the ACMS8CB in campus or multi-building commercial access control systems where you need to consolidate power and gain supervised visibility into lock and reader faults. It's particularly valuable in retrofits where running new power distribution would be costly; PoE-based distribution leverages existing network infrastructure instead. Not a fit for small single-door deployments or battery-backed systems without a separate UPS upstream.
