Comelit 1622 Speaker Unit for Simplebus 2 Entrance PA

We've installed the Comelit 1622 across a range of residential complexes and boutique office buildings, and it remains a solid choice if your infrastructure is already committed to Simplebus 2. The native integration — no protocol translation, no middleware polling delays — makes it operationally simpler than systems that attempt to bridge proprietary audio to IP-based VMS platforms. The 2MP video capture at the entrance point is the real lift here: it lets residents or security verify visitors in real time before buzzing them in, and that decision loop is measurably faster than audio-only call systems. Where integrators sometimes stumble is forgetting that the 1622 requires its own dedicated 33Vdc power supply (Art. 1595); attempting to power it from a PoE injector or standard 12Vdc source will result in silent microprocessor lockup — not a dramatic failure, just a unit that stops responding to DIP switch commands and call routing. The watertight housing is adequate for rain exposure at covered entry vestibules, but not for direct spray or prolonged moisture; if your entry point has gutter drainage issues or faces coastal salt spray, consider weatherproofing the surrounding mounting area.

Technical Highlights:

• 2MP Video at Entry Point: 1920×1200 resolution enables facial recognition and package identification at the moment of call. Reduces false-door-open incidents by letting residents make confident access decisions before audio-only ring patterns arrive.
• Microprocessor with 8-Position DIP Switching: Configurable call addressing, lock release timing, and relay behavior without firmware flashing or central controller reprogramming. Changes to unit behavior can be made in field with a small flathead driver — no technician callback required.
• 10A Relay Output & 3A Lock Release: Direct integration with door electrolocks, gate operators, and buzzer circuits. Eliminates the need for external relay modules on simple two-unit or four-unit residential entries, reducing parts count and wiring complexity.
• 120,000-User Call Addressing Capacity: Simplebus 2 network architecture supports this scale natively. Integrators working on large residential campuses or mixed-use properties can deploy multiple 1622 units with coordinated ring-down logic across hundreds of entry points.
• Simplebus 2 Native Protocol — No Translation Overhead: Unlike systems bridging proprietary audio to SIP or RTSP gateways, the 1622 operates directly on the Simplebus 2 call tree. Audio latency is minimal, and call routing failures are easier to diagnose because the entire signal path is within a single, documented system.
• Compact Wall-Mount Form Factor: 4.02" wide × 2.17" tall — fits standard single-gang electrical boxes in most residential entries without requiring custom framing or surface-mounted enclosures that obstruct traffic or look institutional.

Deployment Considerations:

• Dedicated 33Vdc Power Supply (Art. 1595) is Required, Sold Separately: Do not attempt to power the 1622 from PoE, 12Vdc, or any other source. The microprocessor will fail silently, and you'll spend hours troubleshooting why DIP switch changes aren't taking effect. Verify power supply capacity before final installation, especially on long cable runs (>50m).
• DIP Switch Configuration Must Match Your System Topology: Each 1622 needs a unique address within the Simplebus 2 network. Consult the Simplebus 2 system manual for switch patterns matching your call tree. Misconfiguration results in missed calls or units that ring every time any entry point is activated — and these failures often don't surface until residents start complaining after move-in.
• Watertight Housing Tolerates Splash, Not Continuous Spray: Suitable for covered vestibules and indoor lobbies. If installed at an uncovered exterior entrance or exposed to gutter runoff, water ingress can compromise the microphone and relay contacts over 12–18 months. Plan accordingly for site drainage.
• Relay Wiring and Failsafe Behavior Require Electrical Coordination: The 10A relay and 3A lock release outputs must be wired to match your building's fire code and failsafe requirements — typically fail-secure (electrolocks default to locked on power loss). Have an electrician verify relay behavior before occupancy.
• Audio Volume Adjustment is Manual Front-Panel Knob: No remote or system-wide volume control. Install the unit at a height accessible to residents or maintenance staff without requiring ladders. Consider placing it in a location protected from direct handling if volume drift is a concern in your environment.

The Comelit 1622 is the right choice for integrators building or renovating multi-unit residential or light-commercial properties that are standardized on Simplebus 2 infrastructure. It is not a replacement for IP-based intercoms or SIP door stations if your organization requires cloud logging, remote mobile app access, or integration with third-party VMS platforms — those use cases demand an IP-native intercom and a SIP-to-Simplebus 2 gateway, which introduces latency and complexity. For traditional European-style entrance phone systems or in retrofit scenarios where Simplebus 2 is already installed, the 1622 remains a mature, low-cost audio and video entry component. See the Comelit catalog for related entrance control modules and power supplies.