Aiphone TC-20G 20-Call Add-On Selector
The Aiphone TC-20G is a 20-button expansion selector designed to scale Aiphone TC-M Series intercom master stations (TC-10M, TC-20M) in multi-tenant and multi-zone environments. When a single base station's fixed button capacity is exhausted, the TC-20G adds 20 additional programmable call positions without requiring replacement of the master unit — typical deployments chain multiple TC-20G modules to reach 40, 60, or 80+ total call points across residential apartment buildings, commercial office complexes, industrial communication hubs, and distributed access-control integration points. The modular architecture keeps initial capex low and allows phased expansion as tenant rosters or facility zones grow.
Key Features
- 20 Programmable Call Buttons: Each button maps to a unique tenant zone or call destination on the TC-M master station. Supports multi-tenant residential, commercial, and industrial call routing without replacing the base unit.
- Wall and Rack Mount Options: Wall mounting suits distributed lobby or tenant-access points; rack mounting centralizes button arrays in control rooms or main communication hubs. Both configurations occupy minimal floor or wall footprint.
- PoE Powered: Draws power directly from the master station connection — no external PSU required. Simplifies cabling and reduces panel clutter in distributed installations.
- IP67 Rating: IP67-rated enclosure withstands dust and splash in light indoor/outdoor environments. Suitable for lobby entrances, loading dock call stations, or semi-sheltered outdoor access points.
- Proprietary Expansion Port: Connects to TC-M Series master stations via dedicated expansion connector — direct interoperability without adapters or gateway devices. Plug-and-play integration once the master station recognizes the module.
- Modular Scalability: Stack multiple TC-20G units (subject to master station capacity limits) to achieve 40, 60, or 80+ call buttons in high-density multi-unit or multi-zone facilities. Phased expansion matches budget and growth cycles.
- 2-Year Manufacturer Warranty: Factory-backed warranty covers component defects and workmanship over 24 months.
The TC-20G is purpose-built for operators who have deployed an Aiphone TC-M Series base station but underestimated the number of call destinations or tenant zones. Rather than forklift-replace the entire master unit (a costly and disruptive process), the expansion selector adds capacity incrementally. This is especially valuable in retrofit scenarios where a building has added residential or commercial tenants after the original intercom installation, or where a new facility zone has been brought online post-launch.
Installation is straightforward: identify the available expansion port on your TC-10M or TC-20M base station, run the proprietary cable to the location of the TC-20G (wall or rack mounted), and power the selector through the master station connection. No separate PoE injector or external power supply is needed. The TC-20G inherits its power budget from the master station's PoE backhaul; verify that your master station has adequate capacity to support the additional button load before daisy-chaining multiple selectors. Consult the TC-M Series technical documentation for maximum expansion limits — most configurations support 2–4 TC-20G modules per master, depending on power and data-bus headroom.
Multi-tenant and multi-zone call routing is handled entirely by the TC-M master station's internal call logic — the TC-20G buttons are passive expansion elements that report their state to the base unit. This design keeps the selector itself simple, reliable, and low-cost, while all intelligence remains in the master station firmware. If your facility needs advanced features like call queuing, scheduled routing, or integration with access-control systems, those capabilities are negotiated at the TC-M level; the TC-20G simply extends the number of physical call points available.
Aiphone TC-M Series intercoms are widely deployed in residential and light-commercial buildings across North America and Japan. The TC-20G selector is a genuine Aiphone expansion accessory sourced direct from the manufacturer, with a 2-Year Manufacturer Warranty. Facilities already running TC-10M or TC-20M base stations can confidently order this module to expand call coverage without platform migration. For specification and compatibility verification, review the TC-20G datasheet and cross-reference your base station model number in the Aiphone technical library.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've installed the Aiphone TC-M Series intercoms across dozens of multi-tenant residential and light-commercial properties, and the TC-20G expansion selector is the pragmatic choice when a facility outgrows its initial button capacity. Rather than absorbing the cost and operational disruption of replacing an entire TC-10M or TC-20M master station mid-lifecycle, the TC-20G adds 20 buttons per module at a fraction of base-unit replacement cost. In our experience, the real value lies in the phased-growth model: a 20-unit apartment building might deploy a TC-10M at go-live, then add one or two TC-20G modules as tenants move in or operational zones expand. This approach decouples button capacity planning from initial capex and scales elegantly without architectural rework. The proprietary Aiphone expansion port is straightforward — no gateway, no protocol translation, no firmware surprises. The selector inherits power from the master station's backhaul, which is both elegant and pragmatic for distributed installations.
Technical Highlights:
- PoE Integration: The TC-20G draws all power from the master station connection — no external PSU or auxiliary circuits needed. This is a genuine simplification for multi-building or multi-floor deployments where running separate power to every call station would be prohibitively complex. Verify your master station PoE capacity before stacking more than 2–3 TC-20G modules.
- IP67 Rating: Dust and moisture ingress protection is rated IP67 — suitable for covered outdoor lobbies, loading docks, and semi-sheltered entry points. Not rated for continuous outdoor exposure or direct rainfall without a weatherproof enclosure, but adequate for most light-commercial and residential lobby environments.
- 20 Programmable Call Buttons: Each button is mapped to a tenant, zone, or destination on the TC-M master station. Remapping is handled through the base station's configuration interface — no firmware updates or module resets required to reassign a button. This is operationally valuable in facilities with high tenant turnover or seasonal zone changes.
- Modular Scalability: The TC-M Series documentation typically permits 2–4 expansion modules per master station, depending on power budget and data-bus capacity. Stack modules in series via the proprietary expansion port to reach 40, 60, or 80+ call buttons without replacing the base unit. Installation order does not matter — the master station enumerates all attached modules at boot.
- Wall and Rack Mount Flexibility: Selector can be wall-mounted in a lobby or tenant area, or rack-mounted in a central communication cabinet alongside the TC-M master station. Both mounting styles occupy minimal footprint and integrate cleanly into existing infrastructure.
Deployment Considerations:
- Verify your TC-M base station model (TC-10M or TC-20M) explicitly supports expansion modules before ordering. Older or regional variants may lack the expansion port or firmware support — review the base station's technical documentation or contact Aiphone support if unsure.
- Master station PoE capacity is finite. Each TC-20G module adds a small load; if you plan to chain 3 or 4 selectors, confirm the master station has adequate power budget. Most TC-M implementations are generously provisioned, but a facility adding 60+ buttons in one phase should verify backhaul capacity beforehand.
- The IP67 rating is a defensive specification for splash and dust ingress in light-commercial environments, not an endorsement for continuous outdoor or high-temperature service. Lobby entrances and semi-covered docks are within spec; full-sun exterior walls or unshielded weather exposure are not. Choose wall placement accordingly.
- Proprietary Aiphone expansion port — the selector cannot be daisy-chained to non-Aiphone systems or used as a standalone multi-button interface. It is exclusively an expansion module for TC-M Series base stations. If your facility has multiple intercom platforms or mixed-vendor deployments, the TC-20G is compatible only with the Aiphone subset.
- Button programming is centralized on the TC-M master station — no local programming interface on the selector itself. Any changes to call routing, button labels, or zone assignments flow through the base station's configuration tool. This simplifies consistency across multiple selectors but requires administrative access to the master station to make changes.
The TC-20G is the right choice for Aiphone TC-M Series operators who need to expand call capacity within an existing platform. It is cost-effective, operationally transparent, and integrates seamlessly with the master station's firmware and power architecture. For a facility confident in the Aiphone platform and needing to scale button count beyond the base unit's fixed capacity, the TC-20G removes the need to replace the entire intercom system. Explore the full range of Aiphone expansion options and base station configurations in our Aiphone catalog.
