Robotic surgical assemblies

A robotic surgical system comprising:

• a surgical instrument including an end effector;
• a robotic surgical assembly;
• and
• a sterile interface module positionable between the robotic surgical assembly and the surgical instrument to couple the surgical instrument to the robotic surgical assembly, the sterile interface module including:
• a body member configured to selectively couple the surgical instrument to the robotic surgical assembly;
• a first drive transfer assembly supported by the body member and including a drive coupler and a transfer shaft extending from the drive coupler, the drive coupler engagable with the robotic surgical assembly and the transfer shaft engagable with the surgical instrument, the drive coupler and the transfer assembly robotically movable to operate the end effector of the surgical instrument;
• and
• a rotatable collar supported on the body member and operably associated with the first drive transfer assembly, the rotatable collar movable relative to the body member to manually operate the end effector of the surgical instrument.

A method for manually operating an end effector of a surgical instrument coupled to a robotic surgical assembly, the method comprising:

• rotating a rotatable collar of a sterile interface module to axially move a ring coupler relative to an idler coupler;
• selectively engaging the ring coupler with the idler coupler;
• rotating the idler coupler with the ring coupler to manually rotate a first drive transfer assembly while the ring coupler is engaged with the idler coupler;
• and
• manipulating the end effector of the surgical instrument in response to the manual rotation of the first drive transfer assembly.