Introduction
Digital input/output terminals with timestamp
The 8-channel digital input terminal EL1258 records fast binary control signals from the process level and transfers them electrically isolated to the controller. In contrast to the EL1252 with two channels the EL1258 has eight channels and a lower sampling rate. In addition, the EL1258 offers the option of logging several changes of the input signal per PLC cycle and to transfer these to the controller (MultiTimeStamping). The EL1258 is synchronized with other EtherCAT devices through the distributed clocks system, so that events in the whole system can be measured with a uniform timebase. An EL1258-0010 (ground switching) is available as a variant.
The 8-channel digital output terminal EL2258 switches the binary output signals of the controller electrically isolated from the process level. Up to 10 switching orders per PLC cycle can be transferred to the terminal. These are output with an accuracy of up to 10 µs (depending on the selected process image). The distributed clocks are used as time reference. In conjunction with timestamp input terminals the EL2258 enables responses at equidistant intervals that are largely independent of the bus cycle time.
The 16-channel digital EtherCAT Terminal EL1259 combines the function of the EL1258 – eight timestamp inputs – with those of the EL2258 – eight timestamp outputs. The high channel density in conjunction with time stamping of the signals enables fast, efficient processes through optimized sensor and actuator control. The EL1259 is also synchronized with other devices through the distributed clocks system, so that events in the whole system can be measured with a uniform timebase.