Resources

RMC200 Q4

4 Quadrature Encoder Inputs

Q4 Module

The Q4 module provides four quadrature (A, B, Z) inputs with one home input and one registration input per quadrature input. One LED per channel indicates the state of the respective input. Each A quad B input is individually software-configurable as one of the following input types:

  • RS-422 differential receiver
  • Single-ended TTL-level input
  • Differential HTL (High Threshold Logic), up to 24 Vdc signals
  • Single-ended HTL (High Threshold Logic), up to 24 Vdc signals

Each Z (index) input is individually software-configurable as one of the above input types, or a DI (discrete input) type, to support an index input that may be external to the encoder.

Termination is software-selectable for the A and B inputs, and separately for the Z inputs.

Delta recommends an RS-422 line driver output for quadrature encoders, as it provides the highest speed and very good noise immunity. The TTL and HTL input types are intended for retrofit applications where an existing encoder cannot easily be changed to RS-422. For new machine designs, Delta recommends RS-422.