Incremental Modular Rotary Encoders without Integral Bearing

From left to right: ERO 1400, ERO 1200, ERO 1300, ERM 180

ERO incremental modular rotary encoders from HEIDENHAIN consist of a disk/hub assembly and a scanning unit. They were conceived particularly for applications with limited mounting space or when all friction must be avoided. HEIDENHAIN's ERM incremental rotary encoders consist of a magnetized circumferential scale drum and a scanning unit with magnetoresistive sensor. Typical applications include machines and systems with large hollow-shaft diameters where protection from dust and splashwater is required.

Selection aid: ERO and ERM product families

	Series or model	Protection
Disk/hub assembly (radial grating on glass)	Series ERO 1200 Series ERO 1300 Series ERO 1400	IP 00 IP 00 IP 40
Scale drum (magnetized axial grating)	ERM 180	IP 66