Patent-family-89430444

A pump device comprising a rotational pump mechanism (P) arranged for pumping a fluid between a fluid inlet and a fluid outlet, and with an electric motor (MT) arranged to rotate a shaft connected to rotate the rotational pump mechanism (P). A motor drive (MD) is connected to the electric motor MT for driving the electric motor (MT) according to a variable frequency drive scheme. A safety circuit (STO) is connected to the motor drive (MD) and with first and second electric inputs (I1, I2) for connection to external electric switches (SW1, SW2). The safety circuit (STO) can enter a Safe Torque Off state causing the motor MT to stop generating torque, and safety circuit (STO) is designed with a redundancy to enter the Safe Torque Off state also in case of a fault, preferably complying with EN ISO 13849-1:2015, category 3. A housing (H) forms an enclosure in which the motor drive (MD) and the safety circuit (STO) are positioned. The housing (H) is attached to the electric motor MT, e.g. to a conductive motor casing of the electric motor (MT). The housing (H) may encircle partly of fully the electric motor (MT) and pump mechanism (P). The pump device provides a compact pump device with integrated safe function which allows for easy installation in applications with safety requirements, and further the pump device allows quick restart after safe mode.