Installation manual

The validated revision-specific drawing will be added here. Until then, use the following functional terminal groups together with the markings on the installed product; do not infer terminal order or orientation from photographs.

Power

12–24 V DC, positive and negative terminals as marked

Relay outputs

R1–R2, each with COM / NO / NC contacts

Digital inputs

I1–I4 with the dedicated input common on the final COM terminal

Input configuration

Enabled/disabled, contact or voltage logic, normal/reversed state and alarm/restore delays

Mount the IP20 controller on a 35 mm DIN rail (EN 60715) inside a closed electrical panel or another enclosure that provides the protection required by the installation environment.

• Keep the installation free from moisture, conductive dust, corrosive substances and flammable gases or vapours.
• Avoid direct sunlight, heat sources, abrupt temperature changes and strong electromagnetic fields.
• Respect the occupied width, operating temperature and clearances stated for the selected model and revision.

Supply the controller with 12–24 V DC from a certified class-2 limited-power source (LPS), protected against reverse polarity and short circuit.

• Observe polarity and the maximum consumption stated for the installed model.
• Keep the power cable shorter than 2.9 m unless revision-specific documentation states otherwise.
• Keep low-voltage wiring separated from hazardous-voltage circuits according to the applicable installation rules.

Wire each SPDT output using the COM, NO and NC markings shown on the terminal diagram. Select NO or NC according to the required de-energized state; never infer the terminal order from a photograph.

• Protect and size every load circuit within the rating stated for the installed hardware revision.
• For hazardous-voltage loads, switch only the phase conductor and keep the same voltage category across adjacent relays.
• Use an external contactor or interface relay when the load type, inrush current or required isolation exceeds the product rating.

Connect the four or six programmable digital inputs only as shown by the terminal diagram for the selected model. SBIOT360 and SBIOT240 do not provide analogue inputs.

• Use the dedicated input common at the final common terminal shown in the diagram; do not substitute the power-supply negative terminal.
• Do not apply a voltage or signal type unless it is explicitly permitted by the revision-specific electrical data.
• Keep input cables shorter than 2.9 m and use suitable shielding near strong electromagnetic fields.

The controller is not a certified safety thermostat and must not replace a compliant physical thermostat, temperature limiter or other mandatory protective device.

• Provide the independent thermostat or limiter required by the heating system design.
• Define the safe relay state for loss of sensor data, loss of connectivity and controller restart.
• Have the complete circuit and its fail-safe behaviour verified by qualified personnel before operation.

The controller communicates with switchButler IoT over 2.4 GHz Wi-Fi. The radio implementation and conformity documentation are model- and revision-specific.

• Remote connectivity is an operational service and must never form the only safety chain.
• Local behaviour during an Internet or platform outage follows the applied device configuration and firmware revision.
• Install the antenna area away from metal screening and interference sources where required by the product documentation.

SBIOT240 has no display. Commissioning, configuration, monitoring and authorised commands are handled through switchButler IoT and the documented front-panel indications.

• Do not follow SMSB240EX instructions for pairing, expansion channels or association with another controller.
• Do not follow legacy switchButler instructions concerning SIM, GSM/LTE, antennas or SMS commands.
• Use only the SBIOT240 firmware, product label and revision-specific terminal documentation.