SSR Add-on for Shelly The Pill – Control Interface for Solid State Relays (SSR), Power Automation

The SSR Add-on for Shelly The Pill is a control interface with two solid-state relay (SSR) channels, each rated 30V DC / 300mA, designed for safe switching of low-power loads in automation applications. As solid-state relays, they switch without any moving mechanical parts, which ensures a much longer service life than conventional electromechanical relays.

The add-on provides two fully galvanically isolated (potential-free) outputs, LOAD1 and LOAD2, plus a configurable digital input/output channel IO3 at 3.3V logic level, useful for reading the state of an external contact or controlling a third device. Optional 5V and GND terminals allow auxiliary modules to be powered directly from the add-on.

It is suitable for automating low-power systems such as solenoid valves, auxiliary relays, industrial signalling LEDs or control circuits in DIY applications and automation projects for greenhouses and plant rooms.

Please note: the add-on requires the 5-Terminal Add-on module (sold separately) to connect to The Pill by Shelly; the maximum load per channel is 300mA at 30V DC and must not be exceeded.

Practical use cases

• Controlling low-voltage solenoid valves for irrigating a greenhouse, within the limit of 30V DC / 300mA per channel.
• Signalling with industrial LEDs or control of auxiliary relays via the galvanically isolated LOAD1 and LOAD2 outputs.
• Reading the state of an external contact via the IO3 channel (3.3V), for automations in technical rooms.
• Powering an auxiliary module directly from the optional 5V and GND terminals.

Technical specifications

Reliable and free of mechanical parts, the SSR Add-on extends The Pill with two solid-state switching channels for low-power automation in technical and industrial applications.