Planning the electrical installation363ADW000462R0101 DCS880 Hardware Manual e aConnection of a motor temperature sensor to the drive I/OWARNINGIEC 60664 requires double or reinforced insulation between live parts and thesurface of accessible parts of electrical equipment which are either nonconductive orconductive but not connected to the protective earth.To fulfill this requirement, the connection of a thermistor (or other similarcomponents) to the inputs of the drive can be implemented by 3 alternate ways:1. There is double or reinforced insulation between the thermistor and live parts ofthe motor.2. Circuits connected to all digital and analogue inputs of the drive are protectedagainst contact and insulated with basic insulation (the same voltage level as thedrive main circuit) from other low voltage circuits.3. An external thermistor relay is used. Rate the insulation of the relay for the samevoltage level as the main circuit of the drive.Also see section Fault Tracing / Motor Protection in DCS880 Firmware Manual.
