R665 – DP840 Pulse Counter S/R 8 ch Description Description R665 – DP840 Pulse Counter S/R 8 ch Pulse Counter or Frequency Measurement Module. Redundant or single. 0.5Hz – 20kHz. Use Module Termination Unit TU810, TU812, TU814, TU818, TU830, TU833, TU842, TU843, TU844, TU845, TU852, TU854. Related products ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE088386R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE053241R1 Read more ABB - 1.3 800xA 6.1 Hardware (3BSE088708/E)3BSE088382R1 Read more