Unipi Extension xS52 is an extension module communicating via the RS-485 serial interface (Modbus RTU). The module is a simple and inexpensive method of extending your project by additional inputs & outputs. The xS52 features a set of analog inputs, but also digital inputs and outputs. This makes it suitable for implementation in more complex projects involving the measurement of analog components. The module is designed for installation on a DIN rail and is compatible with Unipi controllers, as well as PLCs from other vendors.
Inputs & outputs description
Digital inputs (DI) are designed to read binary logic states represented by direct voltage levels. That makes them suitable for reading data from various binary sensors and devices such as switches (on/off), motion sensors (movement detected/not detected), liquid level sensors (full tank/empty tank), etc. All digital inputs also feature counter functionality by default.
Relay outputs (RO) are primarily used for switching two-state devices with higher current draw such as lightbulbs, thermoelectric valve drives, water heaters, pumps, etc.
Analog inputs (AI) are designed to measure resistance and are ideal for reading values from analog sensors (e.g., temperature sensor PT1000).
Communication interfaces
Extension modules communicate through the RS-485 interface (Modbus protocol). Instructions for connection and commissioning, including a description of SW and HW configuration of communication parameters, can be found on this link.
Other functions
Along with standard inputs and outputs, the module also features other functions broadening its possible uses.
Direct Switch
Default settings
Master Watchdog