Incremental encorders: FG 4

The FG 4 optical incremental encoder is a mechanically and electrically robust and reliable unit for use under the harshest ambient conditions. Its features include:
• Designed for heavy duty application.
• High mechanical resistance to shock and vibration.
• Oversized, sealed ball bearings.
• Precision nickel or glass pulse disk, providing high disk segmentation accuracy.
• Substantial separation between disk and scanner unit.
• Standard degree of protection IP 55
• Higher degrees of protection IP 66 or IP 67 (optional).
• Can be fitted with second free shaft extension (option).
• Combined versions with tacho/overspeed switch, absolute encoder possible.
• Resistant to sustained short circuit.
• Unaffected by incorrect polarity.
• High immunity to external pulses, EMI approved.