The TD5207 from Micronor Inc., Newbury Park, CA, is a nonmetallic fiber-optic rotary encoder that operates in extreme electromagnetic fields, such as occur in MRI/NMR medical facilities and industrial process plants. The encoder offers 200 ppr resolution in a 3.0 in. square flange housing and connects to an MR310 remote encoder interface module via a simplex fiber link. The module provides conventional digital/analog position and speed feedback signals for the motion control system. Outputs include A/B quadrature, 4–20 mA, 0–10 V, and RS-232/422.