SICK DFS60B-BDEK00500 Incremental encoders. SICK DFS60B-BDEK00500 is a incremental encoders in the DFS60 family. SICK identifies this exact configuration as manufacturer article 1055378. The official technical record specifies MTTF D (mean time to dangerous failure): 300 years (EN ISO 13849-1) 1); Pulses per revolution: 500 1); Measuring step: 90°, electric/pulses per revolution; Measuring step deviation at non binary number of lines: ± 0.01°; Error limits: ± 0.05°; Communication interface: Incremental. The linked SICK data sheet is specific to DFS60B-BDEK00500.