Introduction
Fig.9: EL1262‑00102-channel digital input/output terminal (5 V DC, 100 ns, 0.1 A, RS422/RS485, with oversampling)
The EL1262-0010 is a universal, high performance oversampling terminal for digital input and output signals. As an EtherCAT oversampling terminal, it increases with this XFC process the temporal resolution of the digital signals many times compared to the EtherCAT bus cycle. The time base of the terminal can be synchronized precisely with other EtherCAT devices via distributed clocks. For the input data it generates a set of process data in each EtherCAT bus cycle, which is collected and transmitted in the next bus cycle. Conversely, it expects a set of output data for the outputs in each EtherCAT bus cycle. With the EtherCAT oversampling principle the output/read time can not be set freely, it results from the continuous rhythm. This distinguishes "oversampling" from the "EtherCAT timestamp principle" where the output/read time can be freely selected (compare EL1252, EL2252).
The terminal contains 2 input and 2 output channels. All 4 channels can be used simultaneously at up to 10 Mbit/s. This allows it to read and output binary states with up to 100 ns fineness. It thus extends the application range of the previous EL1262/EL2262 with its 1 Mbit/s by a factor of 10.
Electrically, it offers both differential RS422 (full duplex)/RS485 (half duplex) and 5 V single-ended in both directions. Termination and bias is electronically switchable for serial operation.
This makes it suitable for the most demanding high-speed applications such as
- laser control
- reading or generating serial protocols (emulating protocols)
- PWM control of converters