EXP70-Q1

Quadrature Input

The Exp70-Q1 Expansion module adds one quadrature input for position feedback, and a high-speed input for homing or registration of the quadrature input. The RMC70 supports up to two Q1 modules. The Q1 is typically used to provide a reference position input.

Supported Encoders

The Q1 module interfaces only to quadrature encoders with Differential Line Driver (RS-422) signals. Single-ended line drivers (TTL) are not supported due to low noise immunity.

The Q1 supports the A and B quadrature signals. It does not support an index (Z) pulse.

Registration Input

The Registration input (Reg) input is a high-speed input for homing or registration of the quadrature input. The Registration input is compatible with 12-24V signals.

Selectable Termination for Daisy-Chaining

The A and B inputs have selectable termination allowing up to 32 EXP70-Q1 modules to be daisy-chained with only the last input terminated. This allows up to 64 slave axes (2 axes per RMC70) to be geared to one master quadrature signal.