162 Optional I/O extension modulesCMOD-02 multifunction extension module(external 24 V AC/DC and isolated PTC interface) Safety instructionsWARNING! Obey the safety instructions for the drive. If you ignore the safetyinstructions, injury or death can occur. Hardware descriptionProduct overviewThe CMOD-02 multifunction extension module (external 24 V AC/DC and isolated PTCinterface) has a motor thermistor connection for supervising the motor temperature andone relay output, which indicates the thermistor status. To trip the drive, the user mustconnect this overtemperature indication back to the drive, for example, to its Safe torqueoff input.In addition, the extension module has an external power supply interface, which can beused to power up the drive control unit in case the drive power supply fails. If you do notneed the back-up power supply, you do not have to connect it because the module ispowered from the drive control unit by default.There is reinforced insulation between the motor thermistor connection, the relay outputand the drive control unit interface. Thus, you can connect a motor thermistor to the drivethrough the extension module.WARNING! Do not connect the +24 V AC cable to the control unit ground whenthe control unit is powered using an external 24 V AC supply.
