Supported encoders / signal types

Differential signals according to RS422 are intended as encoder connection. Single-ended signals from TTL encoders and also signals from Open Collector encoders are also options, through internal pull-up resistances.

The following signal types are supported:

Encoder

Signal type

Setting in
Index 0x80n1:1D * "Counter mode"

Cut-off frequency

Comments

Encoder
with or without zero pulse track C

RS422
(diff. input)

0

20 million increments/s
with 4-fold evaluation,
corresponds to 5 MHz per track

Signal levels according to RS422 are expected

Detection of wire break and short circuit

Counter/pulse generator
with or without zero pulse track C

1

Encoder
with or without zero pulse track C

TTL
(single ended)

2

4 million increments/s
with 4-fold evaluation,
corresponds to 1 MHz per track

A voltage level of nominally 2.0 V to 6.0 V with a current of 2.1 mA or higher is expected.

No wire break detection

Counter/pulse generator
with or without zero pulse track C

3

Encoder
with or without zero pulse track C

open collector

4

400,000 increments/s
with 4-fold evaluation,
corresponds to 100 kHz per track

No wire break detection

Counter/pulse generator
with or without zero pulse track C

5

*) depending on the number of channels (n = 0 for channel 1 and n = 1 for channel 2)

The correct wiring for the respective encoder can be found in chapter Connection.

Further Information