Multifunctional Data Acquisition Expansion Module

The module uses standard industrial protocols over RS-485 or CAN, so it works with most Campbell Scientific, Geokon, and RST loggers, as well as generic Modbus masters. For a specific model, we recommend sending us the logger make and firmware version—our support team will confirm the wiring and protocol settings.

Yes, each channel is independently configurable. You might have a string of vibrating wire piezometers on channels 1–4, a thermistor on channel 5, and a 4–20 mA displacement sensor on channel 6. The module auto-detects the sensor type from your configuration file and applies the correct excitation and scaling.

Typically up to 16 modules can be addressed on a single RS-485 bus, which translates to several hundred channels. Power and cable length limitations usually become the deciding factor before the addressing limit. Our engineers can review your layout to confirm the feasibility.

The channel circuitry is protected by resettable fuses and TVS diodes, but if a surge takes out a channel, the module can still be serviced in the field. A spare I/O board can be swapped with a screwdriver, and the calibration constants are stored in non-volatile memory on the main board, so you don’t need to send it back for recalibration.

Almost everything can be adapted: channel count, sensor excitation ranges, logging interval, enclosure material, cable entry, and even the communication protocol. For bulk orders, we can pre-configure and label each module per your sensor schedule. Just share the project specifications and we’ll return a proposal within a few days.