Wiring Diagram for Tegui 2-Wire System: 1 Outdoor Panel and 16 Apartments on 1 Riser

May 7, 2026

Esquema de conexionado sistema 2 hilos Tegui SFERA New - 1 placa exterior 16 viviendas 1 montante con derivador 346841

Wiring diagram: 1 SFERA New outdoor panel and 16 homes on 1 riser

This is the most common wiring diagram in Spanish residential buildings: a single street panel Tegui SFERA New connected to 16 homes distributed in 1 riser, with the BTicino 346841 floor tap on each floor (2 homes per floor, 8 floors).

Wiring diagram for Tegui SFERA New 2-wire system - 16 homes 1 riser tap 346841

System components

Component	Reference	Quantity	Installer price
SFERA New outdoor panel	351500 + fronts	1	View price
Floor tap	346841	8 (one per floor)	€32.13 each
Indoor monitor	Classe 100 / Series 8	16 (one per home)	View kits

👉 View product: Tegui 2-Wire Floor Tap (BTicino 346841) — €32.13

How the 1 riser scheme works

In the 1 riser configuration, all floor taps are chained in series from the street panel to the top floor. Each 346841 tap connects the 2 monitors of that floor to the main 2-wire BUS:

The SFERA New panel connects to the first 346841 tap (ground floor or 1st floor)
The taps are chained in series floor by floor
Each tap powers 2 monitors (left and right homes on each floor)
The last riser tap ends the section with the DIN micro switch

Jumper configuration — Attention!

⚠️ WARNING: Configure and insert the jumpers with the system POWERED OFF. If the configuration is changed with the system running, power must be cut and restored to the system, waiting approximately 1 minute.

Optional actuator for additional function commands: stair lights, additional locks, various activations
Check the device datasheet for exact connection and configuration
For the outdoor panel, SFERA panels with push-button call, digital call as main and secondary PE, and the Linea 5000 panel can be used interchangeably
Switch ON the DIN micro switch located on the back of the last video door phone or doorman that ends the section

MASTER / SLAVE function in each home

If 2 monitors are installed in the same home (for example Classe 300, Classe 300X with Netatmo or Classe 300X), the system operates in MASTER-SLAVE mode:

When the call arrives, the MASTER turns on and rings; the SLAVE only rings
When answering from the SLAVE, the MASTER turns off and the SLAVE monitor turns on
Allows having 2 monitors per home with coordinated behavior without interference

Comparison: 16 homes on 1 riser vs 2 risers

Feature	1 Riser (this diagram)	2 Risers
Number of homes	Up to 16-20	Up to 32-40
Splitters needed	8 (one per floor)	16 (one per floor per riser)
Installation complexity	Simple, 1 chain	Medium, 2 parallel chains
Typical use	Small/medium building	Large building or 2 staircases
Outdoor panel	1 common	1 common for both risers

👉 See diagram for 32 homes on 2 risers →

Frequently Asked Questions (FAQ)

How many 346841 splitters do I need for 16 homes on 1 riser?

With 2 homes per floor and 8 floors, you need 8 splitters 346841, one per floor.

Can I connect more than 16 homes on 1 riser?

Yes, the system supports up to 98-100 calls depending on the panel module. For buildings with more homes per riser, additional splitters are added. For buildings with 2 staircases or entrances, the 2-riser diagram is recommended.

Is it mandatory to terminate the BUS on the top floor?

Yes. The DIN micro switch on the last device of the section must be in the ON position to properly terminate the BUS and avoid signal issues.

What is the maximum distance between the panel and the farthest monitor?

It depends on the type of cable: with triplex cable up to 140 m, with Cat.5 UTP up to 200 m (24-unit configuration). Check the maximum distance table in our home composition guide.