MX module encoders

  Transducer MX840B‑R
Incremental encoder (timer, TTL)

Notes on wiring encoder inputs:

  • Always check encoder data sheet for maximum supply voltage. Supplying 12-volt transducer power to a 5-volt encoder may damage it.
  • Transducer power is limited to 3 W. Check encoder data sheet to ensure the encoder and any necessary pull-up resistors use less than 3 W total.
  • If using a differential encoder in a single-ended (ground referenced) configuration, connect only the positive inputs (f1(+), f2(+) and Z(+)) or only the negative inputs (f1(-), f2(-) and Z(-)).
  • Check encoder data sheet for output low and high voltages and set thresholds accordingly.

For applications requiring long cable runs or more than 200K pulses per second, use the differential wiring diagram below. Place the 120-Ohm termination as close to the input as possible to dampen reflections.