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:

2: Encoder TTL (single ended)
3: Counter TTL (single ended)
4: Encoder open collector
5: Counter open collector

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 type TTL (single-ended) and Open Collector 1: — TTL, Open Collector signal level (single-ended signal)

Key:

V_IN	Single-ended input voltage
A, B, C	Encoder signals A, B, C

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, C are connected to 5 V via pull-up resistors (1 kΩ).