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.
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Wire break detection (open circuit) Wire break detection (open circuit) inherently does not work with single-ended cables: TTL and open collector encoders, as well as counters and pulse generators. |
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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). |