RS422 mode

Notice

Differential and single-ended connection

The RS422 signal transmits a differential voltage, which makes the signal less sensitive to interference compared to a single-ended signal.

  • If the encoder signal is to be transmitted over longer distances or at higher frequencies, an encoder with RS422 signals is recommended.
  • Shielded and twisted pair cables should be used.

Connection of RS422 encoders with or without zero pulse

RS422 mode 1:Fig.28: Connection of RS422 encoders with zero pulse in single-channel mode
RS422 mode 2:

Connection instructions

  • When using an encoder without zero pulse C, the terminal points for the C track are not connected.

Connection of RS422 counters / pulse generators with or without zero pulse

RS422 mode 3:Fig.29: Connection of RS422 counter / pulse generators with zero pulse in single-channel mode
RS422 mode 4:

Connection instructions

  • If a counter / pulse generator is connected, the B track determines the counting direction.
    In RS422 mode a differential signal is expected on the B̅ track.
  • When using a counter / pulse generator without zero pulse C, the terminal points for the C track are not connected.