Safe/reliable operating temperature

The temperatures you’re seeing in SLCC (48–56 °C) are internal device temperatures, not the ambient air temperature inside the enclosure. These values are measured at the internal ICs and power electronics, so they will always be higher than the cabinet air temperature.

Based on the values you’ve quoted, everything is well within normal operating range for SpaceLogic LED dimmers.

A few key points worth clarifying:

• The temperatures shown in SLCC are not used to assess enclosure ventilation or ambient conditions.
• The dimmers are designed to operate safely at these internal temperatures.
• There is no need for fans at this point based on the numbers you’ve provided.

What does matter for long‑term operation is the ambient air temperature around the dimmers:

• Channel de‑rating is based on ambient air temperature, not internal readings.
• De‑rating typically starts around 35 °C ambient and continues progressively up to around 55 °C ambient (see the User Guide).
• While 55 °C is the upper limit, it would not be recommended to operate a cabinet anywhere near this in normal use.
• From a reliability perspective, keeping the cabinet below ~35 °C ambient is preferable.

Lower ambient temperature directly improves lifespan—particularly of components like electrolytic capacitors, which are sensitive to heat. This is true for all electronic equipment, not just C‑Bus dimmers.

For completeness:

• The dimmers will automatically reduce output as internal chip temperatures rise (starting well above your current levels).
• Protective shutdown occurs only at much higher internal temperatures (≈100 °C), so the devices actively protect themselves.

In summary:

• 48–56 °C internal temperature = completely normal
• No additional cooling required at present
• Focus on reasonable cabinet ambient temperature, not the SLCC readings

I strongly recommend reviewing the SpaceLogic C‑Bus Digital Dimmers User Guide—particularly pages 17–18, which explain thermal behavior, de‑rating, and protection mechanisms very clearly.

SpaceLogic C-Bus Digital Dimmers User Guide

One additional point worth mentioning is that SpaceLogic dimmers can be enabled to actively report temperature information onto C‑Bus, which gives you options beyond just observing values in SLCC.

• Device and channel temperatures can be exposed via the C‑Bus Measurement Application, allowing regular temperature updates to be published on the bus.
• Thermal warnings and fault conditions can be reported using the C‑Bus Error Application, with configurable thresholds for setting and clearing alarms automatically.

This means that if you wanted to implement some form of automated response (as suggested earlier in the thread), you absolutely can — using:

• Automation Controllers
• PAC / Wiser / Home Controller
• Or any logic engine capable of processing Measurement or Error Application messages on C‑Bus

Typical uses might include:

• Alerting or logging when temperatures exceed a defined limit
• Triggering ventilation or load reduction logic
• Producing a temperature trend over time, which can be useful for validating cabinet design and confirming long‑term stability

Alternatively, you may simply choose to log the temperature data and trend it over days or weeks to build confidence that everything is operating normally.

These configuration options can be found in SLCC under the “Measurement” and “Error Reporting” sections for the dimmer, where both reporting behavior and alarm thresholds can be configured.