Within the ML-525 we have implemented multiple drivers to support various sensor and data-endpoint protocols. To manage the settings for these protocols, the data logger provides up to 30 driver configuration slots.
For example, you could use all 30 slots to connect 15 MODBUS sensors and 15 SDI-12 sensors, but in that case no slots would remain for configuring a data endpoint or output driver.
You can use the tool below to check whether your application fits within the 30-slot limit.