Defines real-time optical serial interface for equipment from different manufacturers operating in torque, velocity, or position interface operating modes.
BS EN 61491:1999 history
2014BS EN 61158-2:2014 Industrial communication networks. Fieldbus specifications. Physical layer specification and service definition
2010BS EN 61158-2:2010 Industrial communication networks. Fieldbus specifications. Physical layer specification and service definition
2009BS EN 61158-2:2008 ED 4 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
1999BS EN 61491:1999 Electrical equipment of industrial machines - Serial data link for real-time communication between controls and drives