Technical properties

The EL5101-00xx series incremental encoder interface terminals enable incremental encoders with A/B/C track to be connected to bus couplers or the PLC. The terminals are supplied as a 4-fold quadrature decoder with complementary evaluation of the sensor signals A, B, C. Differential signals according to RS422 (for EL5101 and EL5101-0090 also TTL) are intended as encoder connection.

In addition to the encoder inputs A, B, C, an additional latch input (24 V) and a gate input (24 V) for locking the counter during operation are available (not for EL5101-0011).

If the incremental encoder has an alarm output, it can be connected to the INPUT 1 status input of the EL5101-00x0.

EL5101

In “normal operation mode”, a 16 bit counter with a quadrature decoder and a 16 bit latch can be read, set, or enabled.
In “extended operation mode”, a switchable 16/32 bit counter and a 32 bit latch can be read, set, or enabled.
The EL5101 features “extended operation mode” in addition to “normal operation mode” only starting with firmware 14/hardware 09. The differences are explained in the chapter “EL5101 – Enhanced operation mode as of FW14/HW09”.

Internal pull-up resistors also allow for 5 V single-ended signals (on the EL5101, starting with hardware version 09).

The terminal can optionally be operated as a bidirectional counter terminal on channel A.

EL5101-0010

The EL5101-0010, with a resolution of 20 million increments/s at 5 MHz and 4-fold evaluation, can only be used in “extended operation mode” and can process only differential signals according to RS422 at the encoder connection.

The microincrement mode is not available for the EL5101-0010.

EL5101-0011

The EL5101-0011, with a resolution of 20 million increments/s at 5 MHz and 4-fold evaluation, can only be used in “extended operation mode” and can process only differential signals according to RS422 at the encoder connection.

The microincrement mode is not available for the EL5101-0011.

The EL5101-0011 supports the oversampling principle.

The terminal does not have additional latch and gate inputs.

EL5101-0090

The EL5101-0090 offers the full range of functionalities of the EL5101.

In addition, the EL5101-0090 supports TwinSAFE SC technology.