Introduction

Incremental encoder interface, RS422, 5 MHz

The EL5101-0010 EtherCAT Terminal is an interface for direct connection of incremental encoders with differential inputs (RS422). With a maximum input frequency of up to 5 MHz it is particularly suitable for dynamic applications.

The EL5101-0010 with a resolution of 20 mio. increments/s at 5 MHz and 4-fold evaluation is only applicable for the enhanced operating mode. The microincrement mode is not available for the EL5101-0010.

A switchable 16/32-bit counter with a quadrature decoder and a 32-bit latch for the zero pulse can be read, set or enabled. The measurement of period and frequency with a resolution of 100 ns is possible.

Two additional 24 V digital inputs are available for storing, blocking and setting the counter status. The gate input allows the locking of the counter, alternatively with a high or low level. The latch input is similarly configurable and evaluates high or low levels

Incremental encoders with alarm output can be connected at the negative switching status input of the interface. The 5 V and 24 V supply of the encoder can be provided directly via the terminal connection points.

The EL5101-0010 supports distributed clocks in the enhanced operating mode, i.e. the input data can be recorded synchronously with other data that are also linked to Distributed Clock slaves. The accuracy across the system is < 100 ns.

A timestamp for the last-registered incremental edge is also available. The use of encoder profiles enables simple and fast linking of the process data for Motion Control applications.