The Extension Box modules cover the full spectrum of I/O signals: digital inputs with different filters, digital outputs with 0.5 and 2 A output currents, analog inputs and outputs with a 16 bit resolution, thermocoupler and RTD inputs, serial interfaces and encoder inputs.
Similarly to the Compact Box modules, the digital inputs and outputs can be connected either through 8 mm snap type connectors or screw type connectors (M8 and M12). Analog signal types are provided with the M12 version. The snap type connectors lock in place positively, forming a vibration-proof connection, while the screw type connectors offer the advantage of high resistance to being pulled out.
The extension modules are connected to the process level via the fieldbus coupler. Up to 120 extension modules can be connected at distances of 15 m from box to box via the IP-Link communication connection.