Heidenhain ROD 426 1250 rotary encoder retrofit

The Heidenhain ROD 426 1250 is an incremental rotary encoder with integral bearing, designed for use with a separate shaft coupling. It belongs to the ROD 426 product family of incremental rotary encoders and is used in metrology applications, typically in CNC machines and drive systems. The encoder features a line count of 1250 and outputs signals via a TTL interface. The maximum scanning frequency is 300 kHz at a supply voltage of 5 V (±10%). The flange design is a synchro flange with an outer diameter of 58 mm, a centering collar of 50 mm, a bolt circle of 42 mm, and three M4 mounting holes. The solid shaft has a diameter of 6 mm and a length of 9.5 mm. The degree of protection is IP 64 according to EN 60529, protecting the encoder against dust and splash water. The permissible operating temperature range extends from -40 °C to +100 °C. The rotary encoder is available in various connection variants: with coupling M23, pin, 12-pole (usable axially and radially, cable length 0.25 m) or with flange socket M23, pin, 12-pole (radial). Depending on the version, different pin assignments (D322806 or D294999) are used. The full product designation is: ROD 426 1250 – available under manufacturer IDs 376846-1X and 376846-LY.