This article describes the wiring architecture for a standard single-phase Hybird installation using RCBO breakers.
Components
A standard single-phase installation consists of:
One or more Hybird RCBO breakers (HY-RCBO, 2-pole) mounted on DIN rail.
One Hybird Edge Controller mounted on DIN rail in the same panel.
One PSU power supply (230V AC to 24V DC) to power the controller.
Optional: one UPS (3.7V / 20Ah Li-Polymer) for battery backup.
RS485 communication wiring between all breakers and the controller.
Power wiring
Each RCBO breaker is wired into its circuit as a standard 2-pole breaker: phase (L) and neutral (N) in, phase and neutral out to the protected circuit. The breaker provides both overcurrent and earth leakage protection for that circuit.
The PSU connects to 230V AC mains and provides 24V DC to the controller. If a UPS is fitted, it connects between the PSU and the controller via the supplied IDC cable, providing battery backup.
The required mounting order from left to right on the DIN rail is:
PSU only: PSU → Edge Controller
PSU + UPS: PSU → UPS → Edge Controller
The Edge Controller must always be positioned to the right of both the PSU and UPS. When both are present, the UPS must always be in the middle between the PSU and the Edge Controller.
RS485 communication wiring
All Hybird breakers communicate with the controller over a two-wire RS485 bus operating at 500 Kbps using the Modbus protocol.
The RS485 bus uses a daisy-chain topology: a pair of wires runs from the controller to the first breaker, then from the first breaker to the second, and so on. Each Hybird installation includes pre-cut RS485 wire rated for 110°C and 600V, cut to the length needed to connect breakers to each other on the DIN rail.
Key wiring rules:
The bus is a daisy chain - do not use star or T-tap topology.
Maximum 80 breakers per controller.
Each breaker must have a unique Modbus ID.
The included pre-cut wire should be used to connect adjacent breakers. For longer runs between panels, use twisted-pair cable suitable for RS485 (confirm cable specification with Hybird support if using non-supplied cable).
Ethernet / network connection
The controller connects to the local network via an Ethernet cable to a switch or router. Alternatively, it can use Wi-Fi or LTE as fallback. Only one network connection is needed - the controller manages the fallback sequence automatically.
Commissioning after wiring
After physical wiring is complete:
Power on the PSU and verify the controller boots (LED indicates startup).
Verify the controller connects to the network (LED indicates connected state).
In Hybird OS, perform a breaker scan to discover all connected breakers on the RS485 bus.
Verify each breaker appears with its correct Modbus ID and is reporting measurements.
Label each breaker with its circuit name in Hybird OS.
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