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 without zero pulse in 2-channel mode

RS422 mode 1:
Fig.11: Connection of RS422 encoders without zero pulse in 2-channel mode
RS422 mode 2:

Connection instructions

  • In 2-channel mode only encoders without zero pulse C can be used. The terminal points for the C track are assigned the signals of the second A track.

Connection of RS422 counters/pulse generators without zero pulse in 2-channel mode

RS422 mode 3:
Fig.12: Connection of RS422 counters/pulse generators without zero pulse in 2-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.
  • Only counters/pulse generators without zero pulse are suitable for use in 2-channel mode. The terminal points of the C track are assigned the signals of the second A track.