The European Robotics Arm itself was designed to be serviceable with spare parts kept outside Rassvet module and allow for the exchange of large parts via EVA in case of failure or an emergency situation. There parts are called EVA Replaceable Units (ERUs), also referred to as Orbital Replacement Units (ORUs), which can all be replaced in-orbit; the ERA is composed of three ERU sections. The arm is wrapped with beta cloth blankets for thermal protection. On average the arm uses 475 Watt of power to operate while having a peak operational power consumption of 800 Watt. When on standby the arm only consumes 420 Watt, while in hibernation only uses 250 watt. End effectors Located at either end of the arm are the End Effector Subsystems (EES). The EES is designed to attach specifically with the base points located on the Russian segment of the station. Since the ROS uses different base points than the US Orbital Segment, the arm is unable to operate and access the other parts of the station. Each EES consist of two Basic End Effectors (BEE), Base Points (BP) and Grapple Fixtures (GF). During normal operations, one end effector is connected to a base point on the station, this provides a sufficiently stiff connection between the station and ERA, as well as enabling the transmitting of power, data and video signals for operation of the ERA. At the same time, the second end effector provides mechanical and electrical power to the grappled objects, and allows for data transfer. Both of the end effectors are also capable of measuring torques/forces as well as contain a Camera and Lighting Unit (CLU) which aids in the control of the arm; an additional two CLUs are located on both limbs. Integrated Servicing Tool Located within each of the end effectors' lower compartment is an integrated servicing tool. It is used to provide torque for a grappled object, acting like a wrench. It is capable of screwing and unscrewing bolts. The IST head starts with rotating slowly at first upon system comment, until popping into the IST head receptacle, which allows it to provide the mechanical power to the screw interface. Hardware and software The ERA is controlled from a central computer called the ERA control computer. Control is assisted by the additional microprocessors located in the different subsystems. ERA control computer (ECC) The ECC is located towards the