Signal types

Supported encoders / signal types

Possible encoder connections are single-ended signals from TTL encoders and signals from Open Collector encoders through internal pull-up resistors.

The following signal types are supported:

Encoder

Signal type

Setting in
index 0x80n1:1D "Counter mode"

Cut-off frequency

Comments

Encoder
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 broken wire detection

Counter/pulse generator
without zero pulse track C

3

Encoder
without zero pulse track C

open collector

4

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

No broken wire detection

Counter/pulse generator
without zero pulse track C

5

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

Signal type TTL (single-ended) and Open Collector

With the following settings in "Counter mode" (0x80n1:1D), a voltage level of nominally 2.0 V to 6.0 V with a current of 2.1 mA or higher is expected:

For TTL encoders a cut-off frequency of up to 4 million increments per second is permissible with 4-fold evaluation. This corresponds to 1 MHz.

For Open Collector encoders, a cut-off frequency of up to 400.000 increments per second is permissible with 4-fold evaluation. This corresponds to 100 kHz.

Signal types 1:
TTL, Open Collector signal level (single-ended signal)

Key:

VIN

Single-ended input voltage

A, B

Encoder signals A, B

Notice

Open circuit detection

Open circuit detection inherently does not work with single-ended lines: TTL and Open Collector encoders and counters/pulse generators.

Notice

Open Collector wiring

When selecting an Open Collector encoder under "Counter mode" (0x80n1:1D), the inputs A, B are connected to 5 V via pull-up resistors (1 kΩ).